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Relevant bibliographies by topics / Trucks – Dynamics

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Academic literature on the topic 'Trucks – Dynamics'

Author: Grafiati

Published: 30 June 2021

Last updated: 3 February 2022

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Journal articles on the topic "Trucks – Dynamics"

1

NAGATANI, TAKASHI. "CHAOS AND DYNAMICS OF CYCLIC TRUCKING OF SIZE TWO." International Journal of Bifurcation and Chaos 15, no. 12 (December 2005): 4065–73. http://dx.doi.org/10.1142/s0218127405014507.

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We study dynamical behavior of a few trucks which shuttle between an origin and a destination repeatedly. One loads goods on to trucks at the origin and the truck unloads at the destination. We present the dynamical model for cyclic trucking. The model is described in terms of only one nonlinear map defined from the vector Ti(n), i = 1,2,…,N for N trucks where Ti(n) is the arrival time of truck i at the origin on trip n. The study is limited to the case of two trucks. We clarify the time variations of time headway and tour time for the truck schedule. The distinct dynamical states (the regular, periodic, and chaotic motions) are found by varying delay time T min and loading parameter Γ. It is shown that dynamical transitions occur among the regular, periodic and chaotic motions. In periodic and chaotic motions, the tour time of trucks fluctuates highly and the carrying goods vary the tour time accordingly.

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Yin, Yu Ming, Jue Yang, and Wen Ming Zhang. "Handling and Roll Prediction of Electric Drive Mining Trucks." Advanced Materials Research 712-715 (June 2013): 1135–38. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.1135.

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A method is proposed to predict the handling and roll properties of electric drive mining trucks and evaluate their safety status. Trucksim is used to simulate the truck dynamics and Simulink is used to model the electric drive system, the truck model takes a double-lane change manoeuvre according to ISO 3888-1. A 190t mining truck is demonstrated and the understeer gradient and roll angle results respect its safety status well. Using this method, mining truck designers could make the handling and roll prediction before manufacture and modify their design.

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Yuan, Kai, and Hong K. Lo. "Multiclass Traffic Flow Dynamics: An Endogenous Model." Transportation Science 55, no. 2 (March 2021): 456–74. http://dx.doi.org/10.1287/trsc.2020.1015.

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Vehicles on roads can be distinguished, each defined by its own set of properties (e.g., fleet length and free-flow speed). The traffic states on roads can be attributed to the longitudinal heterogeneity in vehicles. Vehicles slower than prevailing vehicles are defined as moving bottlenecks. On a multilane road section with multiple vehicle types, slower vehicles create moving bottlenecks and induce overtaking by faster vehicles so as to maintain their higher desired speed. The influence of single-class moving bottlenecks has been studied in the past. However, the impacts of multiple classes of moving bottlenecks have not yet been fully explored. This paper categorizes vehicles into passenger cars, medium trucks, and heavy trucks. By defining medium trucks and heavy trucks as moving bottlenecks, we develop analytical formulas for the fundamental diagram on a multilane road section with heterogeneous moving bottlenecks. The formula confirms that the composition of traffic and the longest truck platoon length influence the fundamental diagram. We then conduct simulations using a first-order kinematic wave model in Lagrangian coordinates to validate the fundamental diagram developed with the analytical formula and obtain promising results. This study provides fundamental knowledge for multiclass traffic modeling and multilane traffic operations.

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Ramezani, Hani, Steven E. Shladover, Xiao-Yun Lu, and Osman D. Altan. "Micro-Simulation of Truck Platooning with Cooperative Adaptive Cruise Control: Model Development and a Case Study." Transportation Research Record: Journal of the Transportation Research Board 2672, no. 19 (August 29, 2018): 55–65. http://dx.doi.org/10.1177/0361198118793257.

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Cooperative adaptive cruise control (CACC) systems have the potential to improve traffic flow and fuel efficiency, but these effects are challenging to estimate. This paper reports the development of a micro-simulation model to represent these impacts for heavy trucks using CACC when they share a freeway with manually driven passenger cars. The simulation incorporates automated truck-following models that have been derived from experimental data recorded on heavy trucks driven under CACC, adaptive cruise control (ACC), and conventional cruise control (CC). The simulation includes other behavioral models for lane changing, lane change cooperation and lane use restrictions for trucks to better capture real-world traffic dynamics. The paper explains the calibration of the simulation method for a 15-mile urban freeway corridor with heavy truck traffic and significant congestion. Simulation results for different market penetration rates show that truck CACC improved traffic operations for trucks in terms of vehicle miles traveled, average speed, and flow rate. In addition, truck CACC did not adversely affect passenger car operations and in some locations it even produced considerable improvements in the general traffic conditions.

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Ding, Haitao, Amir Khajepour, and Yanjun Huang. "A novel tripped rollover prevention system for commercial trucks with air suspensions at low speeds." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 232, no. 11 (November 11, 2017): 1516–27. http://dx.doi.org/10.1177/0954407017731987.

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This paper presents a novel system to avoid tripped rollovers at low-speed operations for commercial vehicles with air suspension systems. This is of particular significance since truck rollovers have become a serious road safety problem, which usually lead to severe injuries and fatalities. Several active anti-rollover systems have been proposed in the past two decades; however, most of them focus on untripped rollover prevention instead of the tripped rollovers. Up to now, very few pieces of literature discuss the approaches that are used to avoid tripped rollovers of trucks. Furthermore, the air suspension is widely used for commercial vehicles, thus it provides an opportunity to prevent rollovers when properly manipulated. Therefore, a novel tripped rollover prevention system is proposed for trucks at low-speed operations with air suspensions. A roll dynamics model with an air spring is built to investigate the dynamic behavior and the time response of the whole system. More importantly, the feasibility of this new anti-rollover system is discussed and verified by the co-simulations in TruckSim and MATLAB/Simulink under two possible tripped rollover conditions.

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Chen, Yutao, Nazar Rozkvas, and Mircea Lazar. "Driving Mode Optimization for Hybrid Trucks Using Road and Traffic Preview Data." Energies 13, no. 20 (October 14, 2020): 5341. http://dx.doi.org/10.3390/en13205341.

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This paper proposes a predictive driver coaching (PDC) system for fuel economy driving for hybrid electric trucks using upcoming static map and dynamic traffic data. Unlike traditional methods that optimize over engine torque and brake to obtain a speed profile, we propose to optimize over driving modes of trucks to achieve a trade-off between fuel consumption and trip time. The optimal driving mode is provided to the driver as a coaching recommendation. To obtain the optimal solution, the truck dynamics are firstly modeled as a hybrid controlled switching dynamical system with autonomous subsystems and then a hybrid optimal control problem (HOCP) is formulated. The problem is solved using an algorithm based on discrete hybrid minimum principle. A warm-start strategy to reduce algorithmic iterations is used by employing a shrinking horizon strategy. In addition, an extensive analysis of the proposed algorithm is provided. We prove that the the coasting mode is never optimal given the truck configuration and and we provide a guideline for tuning parameters to maintain the optimal mode sequence. Finally, the algorithm is validated using real-world data from baseline driving tests using a DAF hybrid truck. Significant reduction in fuel consumption is achieved when the data is perfectly available.

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Goenaga, Boris, Shane Underwood, and Luis Fuentes. "Effect of Speed Bumps on Pavement Condition." Transportation Research Record: Journal of the Transportation Research Board 2674, no. 9 (July 16, 2020): 66–82. http://dx.doi.org/10.1177/0361198120927005.

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Speed bumps are efficient traffic calming devices that allow transport authorities to control vehicle speeds and improve safety in specific locations. Though frequently used in residential areas, they have become increasing prevalent in other higher volume roadways (particularly in developing countries), because of their effectiveness, low-cost of implementation, and easy installation process. However, in these countries there is no proper technical guidance for speed bump design and implementation, which is why one can often find these devices placed on an arterial highway or on roads where the proportion of trucks is high. The most important consequence of placing a speed bump on a road with large numbers of trucks is that the pavement deterioration process will accelerate as a result of the induced vibrations and bouncing of a truck’s suspension. In this paper the relationship between the bump geometry—length and height—and the dynamic load transmitted to the pavement is studied. A full truck model has been used to simulate the vehicle dynamics while passing over the bump, to estimate the demand imposed over the pavement. Damage was calculated for each simulation scenario using a combination of linear-elastic analysis and empirical damage functions. The geometry that leads to less damage is the circular, with a minimum length of two meters and a maximum height of ten centimeters.

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Nowak, Andrzej S. "Load model for bridge design code." Canadian Journal of Civil Engineering 21, no. 1 (February 1, 1994): 36–49. http://dx.doi.org/10.1139/l94-004.

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The paper deals with the development of load model for the Ontario Highway Bridge Design Code. Three components of dead load are considered: weight of factory-made elements, weight of cast-in-place concrete, and bituminous surface (asphalt). The live load model is based on the truck survey data. The maximum live load moments and shears are calculated for one-lane and two-lane bridges. For spans up to about 40 m, one truck per lane governs; for longer spans, two trucks following behind the other provide the largest live load effect. For two lanes, two fully correlated trucks govern. The dynamic load is modeled on the basis of simulations. The results of calculations indicate that dynamic load depends not only on the span but also on road surface roughness and vehicle dynamics. Load combination including dead load, live load, dynamic load, wind, and earthquake is modeled using Turkstra's rule. The maximum effect is determined as a sum of the extreme value of one load component plus the average values of other simultaneous load components. The developed load models can be used in the calculation of load and resistance factors for the design and evaluation code. Key words: bridge, dead load, live load, dynamic load, load combinations.

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Satoh, Eisakul, Masayuki Miyamoto, Kazuhiko Tezuka, Katoshi Fukazawa, Takeshi Hayase, and Yasutoyo Ishiguro. "Dynamics of Railway Vehicle with independently Rotating Wheel Trucks Serving as Driving Truck." Transactions of the Japan Society of Mechanical Engineers Series C 61, no. 582 (1995): 579–86. http://dx.doi.org/10.1299/kikaic.61.579.

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Dadonov, Mikhail, Alexander Kulpin, Valery Borovtsov, and Anar Zhunusbekova. "Effect of aerodynamic loads on redistribution of normal reactions of quarry dump trucks tires." E3S Web of Conferences 174 (2020): 03018. http://dx.doi.org/10.1051/e3sconf/202017403018.

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Tires of quarry dump trucks occupy one of the leading places in the item of costs for motor transport, as they are expensive product and at the same time more than half of them do not generate their resource. The causes of premature tires failure are exceeding normal load on them. In turn, the aerodynamic forces effect on the quarry dump truck as one of the influencing factors, is the dynamic redistribution of normal loads on tires and, as a result, affects temperature modes. The determination of the load on the tire under different operating conditions will increase the service life of the tires and avoid early failure. The proposed calculation method of aerodynamic loads and their influence on redistribution of normal mine dump truck tires reactions in dynamics allows to make correction to load modes and control the tires resource, which will lead to more complete use of tires resource.

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Dissertations / Theses on the topic "Trucks – Dynamics"

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Heffernan, Matthew Evan Bevly David M. "Simulation, estimation, and experimentation of vehicle longitudinal dynamics that effect fuel economy." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Summer/Theses/HEFFERNAN_MATTHEW_41.pdf.

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Williams, Nathan A. "Drag optimization of light trucks using computational fluid dynamics." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03sep%5FWilliams%5FNathan.pdf.

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Thesis (M.S. in Mechanical Engineering and M.S. in Information Technology Management)--Naval Postgraduate School, September 2003.
Thesis advisor(s): Joshua H. Gordis, Dan Boger. Includes bibliographical references (p. 157-158). Also available online.

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Aquaro, Matthew. "Stability analysis of partially filled tanker trucks using a finite element modeling approach." Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=453.

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Thesis (M.S.)--West Virginia University, 1999.
Title from document title page. Document formatted into pages; contains x, 78 p. : ill. (some col.) Includes abstract. Includes bibliographical references (p. 46-47).

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Gao, Huaizhu. "Temporal and spatial statistical analyses of tropospheric ozone, NOx dynamics and heavy-duty truck transportation activities in southern California /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2004. http://uclibs.org/PID/11984.

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Thesis (Ph. D.)--University of California, Davis, 2004.
Degree granted in Civil and Environmental Engineering. Includes bibliographical references. Also available online. (Restricted to UC campuses)

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George, Rodney Martin, and rod george@arrb com au. "Towards performance-based route selection guidelines for heavy vehicles (the dynamics of heavy vehicles over rough roads)." Swinburne University of Technology, 2003. http://adt.lib.swin.edu.au./public/adt-VSWT20060629.100558.

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With an increasing number of transport operators seeking permits to operate nonstandard or purpose-built vehicle types, information is required to assist road authorities to determine which vehicle types could operate on the road network without compromising the safety of other road users. A project was created by ARRB TR to develop guidelines for determining route access for heavy vehicles. This project was developed in conjunction with the state road authorities, the National Road Transport Commission and the transport industry to obtain an understanding of the road space requirements for a range of common vehicle types. This project is the subject of this thesis. Two series of field experiments were conducted with six common heavy vehicle types on public roads west of Parkes NSW. Information collected during these full-scale experiments was used to increase the knowledge of the dynamic behaviour of these vehicles and to develop model route access guidelines. Data obtained from these field experiments also provided information to validate computer models and simulation outputs. This thesis showed that: 1) There was experimental evidence to demonstrate that vehicle lateral movement is excited by differences in vehicle wheelpath profiles (point-by-point pavement crossfall), which make a contribution to trailing fidelity (swept width), offtracking and swept path; 2) Vehicle type and speed are prime influences on the lateral movement of the rear trailer and therefore an important input into the model route access guidelines. Notwithstanding the practical and safety implications of applying different speed limits for various vehicle types, speed is a prime contributor to vehicle lateral movement and should be considered when determining route access; 3) Limited lateral position information suggested that one driver of two vehicle types position the vehicles so that the tyres on the rear trailer track on the sealed pavement and not on the pavement shoulder; 4) Based on a statistical analysis of the data obtained from the small sample which only considered the average crossfall of each test section the relative importance of the key parameters was (highest to lowest), IRI, vehicle speed and vehicle type. It was shown that good estimates of lateral movement can be obtained using a double integration technique of the measured lateral acceleration, without applying compensation for the trailer roll or the pavement crossfall. It is recommended that route access guidelines be developed using the lateral performance of a larger sample of vehicles in each class of heavy vehicles operating over a larger range of road types. The route access guidelines should contain a matrix of information on vehicle type/length, pavement condition roughness/profile and lane width. This would provide operators and regulators with a desk-top assessment tool for determining route access.

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Eriksson, Fredrik, Joseph Linu Kuttikkal, and Amanuel Mehari. "Parametric study of a dog clutch used in a transfer case for trucks." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-27107.

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Normally the trucks with four wheel drive option will be running in rear wheel drives and the front wheels will be rotating freely. In extreme tough driving conditions, the risk for getting stopped or slipping the rear wheels in mud is high. When the driver tries to engage the four wheel drive option and due to the difference in relative rotational speed of the dog clutch parts, there is a risk for slipping off or bouncing back of the dog clutch. After studying the importance of gear geometry and a few parameters, the team ended up with a new design and the performance of the design found satisfactory when simulated in MSC ADAMS.

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Balata, Diar, and Robel Menghes. "Innovation Diffusion Dynamics and Behavior of Actors in Road Freight Transportation : A study of the market uptake dynamics and adoption of driverless trucks." Thesis, KTH, Industriell ekonomi och organisation (Inst.), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-296515.

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Technological innovations have long been a driving force of change in different industries. However, not all innovations gain widespread diffusion and adoption, regardless of it being an incremental or a radical innovation. Driverless trucks are expected to have a substantial disrupting effect on the road freight transportation sector. The commercial timeline is characterized by great uncertainty and signs are pointing towards many trucks becoming completely driverless in the coming years. As such, it is of interest to study how the market dynamics will be affected by the introduction of driverless trucks and the potential adoption rate among companies within this industry. The study was carried out using a mixed-method approach consisting of the Bass model to estimate the future adoption rate of driverless trucksand semi-structured interviews with industry actors as well as a survey distributed to haulage organizations to contextualize the model and interview results. The findings suggest that 20 percent of the organizations within road freight transportation in Sweden will have adopted driverless trucks 15 years after market introduction. In addition, the model suggests that 100 percent adoption will be reached after 40 years. However, achieving a fully driverless fleet will be difficult due to complex traffic environments and non-driving related tasks. The interview respondents acknowledge the significant impact driverless trucks are expected to have on the industry that has been operating with the same practices for many years. Furthermore, the haulage companies expressed a reluctance towards driverless trucks and a low willingness to pay, albeit being open to innovations in general. This may be due to changes in the current way of operating, the emergence of new business models challenging the status quo, and the limited financial strength among these organizations that may have a harming effect on the opportunity to adopt the innovation.
Teknologiska innovationer har länge varit en drivande faktor till förändring i olika industrier. Alla innovationer får dock inte bred spridning och adoption, oberoende om det är en radikal eller inkrementell innovation. Förarlösa lastbilar ses av många som en radikal innovation och förväntas ha en störande effekt på transportindustrin och i synnerhet inom vägtransport. Det finns en del osäkerheter gällande den kommersiella tidslinjen, men det mesta pekar på att allt fler lastbilstillverkare kommer öka sin satsning på förarlösa lastbilar. Det är därför viktigt att försöka förstå hur marknads dynamiken kommer att påverkas av introduktionen av förarlösa lastbilar och vidare hur den potentiella adoptionen av innovationen kommer se ut bland användarna. Denna studie tillämpar en “mixed-method” metodik som vidare utgör en framtagen prognos med hjälp av Bass modell, semistrukturerade intervjuer med aktörer verksamma inom vägtransport, och en enkät som distribuerades till åkeriföretag för att sätta perspektiv på resultaten från intervjuerna och den framtagna modellen. Resultaten pekar på att 20 procent av organisationerna inom vägtransport i Sverige kommer att ha adopterat förarlösa lastbilar 15 år efter marknadsintroduktion. Modellen visar vidare att 100 procent adoption kommer att uppnås efter 40 år. Att nå en fullständigt förarlös lastbilsflotta anses vara svårt på grund av den komplexitet som medförs inom trafiken, med stora skillnader mellan orter. Samtliga intervjudeltagare bekräftade att förarlösa lastbilar förväntas ha en stor påverkan på transportindustrin som historiskt varit konservativ. Samtidigt visade enkäten att åkeriföretagen i Sverige hade en motvilja att adoptera förarlösa lastbilar, men verkar däremot vara generellt öppna för nya innovationer inom industrin. Detta kan bero på dagens arbetssätt, att nya utmanande affärsmodeller uppstår och de begränsade finansiella resurserna som organisationerna har som kan ha en bromsande effekt på förmågan att adoptera innovationen.

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Lu, Ming. "System Dynamics Model for Testing and Evaluating Automatic Headway Control Models for Trucks Operating on Rural Highways." Diss., This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-01292008-113749/.

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Hou, Yunbo. "Roll and Yaw Stability Evaluation of Class 8 Trucks with Single and Dual Trailers in Low- and High-speed Driving Conditions." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/88513.

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A comprehensive evaluation of roll and yaw stability of tractor/semitrailers with single and dual trailers in city and highway conditions is conducted. Commercial vehicles fundamentally behave differently in city driving conditions than at high speeds during highway driving conditions. In order to closely examine each, this study offers two distinct evaluations of commercial vehicles: 1) low-speed driving in tight turns, representative of city driving; and 2) high-speed lane change and evasive maneuvers, typical of highway driving. Specifically, for city driving, the geometric parameters of the roadway in places where tight turns occur�"such as in roundabouts�"are closely examined in a simulation study in order to evaluate the elements that could cause large vehicle body lean (or high rollover index), besides the truck elements that have most often been studied. Two roundabout geometries, 140-ft single-lane and a 180-ft double-lane, are examined for various truck load conditions and configurations. The vehicle configurations that are considered are a straight 4x2 truck, a tractor with a 53-ft semi-trailer (commonly known as WB-67), and two trucks in double-trailer configurations. Five potential factors are identified and thoroughly studied: circulatory roadway cross-section, roundabout tilt, truck configurations, truck apron geometry, and truck load condition. The results of the study indicate that when the rear axles of the trailer encounter the truck apron in the roundabout, the climbing and disembarking action can cause wheel unloading on the opposite side, therefore significantly increasing the risk of rollover. Interestingly, in contrast to most high-speed rollovers that happen with fully-loaded trailers, at low speeds, the highest risks are associated with lightly loaded or unloaded trucks. For high-speed driving conditions, typical of highway driving, a semi-truck with a double 28-ft trailer configuration is considered, mainly due to its increasing use on U.S. roads. The effect of active safety systems for commercial vehicles, namely Roll Stability Control (RSC) for trailers and Electronic Stability Control (ESC) for the tractor, is closely examined in a test study. Various trailer loading possibilities are evaluated for different combinations of ESC/RSC on the tractor and trailer, respectively. The results of the study indicate that 1) RSC systems reduce the risk of high-speed rollovers in both front and rear trailers, 2) the combination of ESC (on tractor) and RSC (on trailer) reduce the risk of rollover and jackknifing, and 3) RSC systems perform less effectively when the rear trailer is empty.
PHD

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Gasparini, Ricardo Ferreira. "Dinâmica longitudinal de veículos pesados = forças resistivas e outros fatores de influência no consumo de combustível." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264373.

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Orientador: Franco Giuseppe Dedini
Dissertação (mestrado profissional) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica
Made available in DSpace on 2018-08-16T17:28:53Z (GMT). No. of bitstreams: 1 Gasparini_RicardoFerreira_M.pdf: 3191496 bytes, checksum: 30659cea3db8d634961f1bb5d3fba1fa (MD5) Previous issue date: 2010
Resumo: O principal objetivo deste trabalho é estudar a interação de veículos comerciais com o meio e a influência de suas características dinâmicas no consumo de combustível. O primeiro passo é o levantamento dos parâmetros influentes na modelagem para o desempenho veicular, seja este baseado em métodos de energia, seja baseado em métodos de forças. As relações do veículo com o ambiente serão tratadas como aspectos influentes e incluídas no modelo de desempenho. As simulações e a modelagem final foram implementadas no programa GTDrive, software comercial. Conhecendo essas interações entre veículo e meio, e a influência destas interações no consumo de combustível, deseja-se propor uma nova abordagem no desenvolvimento de projetos automotivos para futuras aplicações em veículos comerciais, visando a redução do consumo de combustível no Brasil
Abstract: The main focus of this work is the study of interaction between commercial vehicle and the environment and also the influence of their dynamic characteristics in the fuel consumption. The first step of this work is to analyze the types of vehicle dynamic modeling based on energy and based on forces (Newton). The relationship between the vehicle and it.senvironment will be considered as influent aspects and should be included into vehicle dynamic modeling. By understanding this relationships and their influence in the fuel consumption it is possible to propose an approach to develop new automotive projects for future commercial vehicle applications focus on fuel consumption and taking into account the Brazilian reality
Mestrado
Dinâmica
Mestre em Engenharia Automobilistica

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Books on the topic "Trucks – Dynamics"

1

El-Gindy, Moustafa. Influence of a trailer's axle arrangement and loads on the stability and control of a tractor/semitrailer. McLean, VA: Federal Highway Administration, 1998.

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Schorpp, Steffen. Dynamic Fleet Management for International Truck Transportation. Wiesbaden: Gabler, 2011. http://dx.doi.org/10.1007/978-3-8349-6675-9.

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Zhu, Bing. Static and dynamic analysis for a refuse truck weigh-in-motion system. Ottawa: National Library of Canada, 1996.

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Jalinier, Christian. Energy consumption of heavy road vehicles: Dynamic verifiable interactive transportation model. Pointe Claire, Que: FERIC, 1992.

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Mahendra, Vaishali Sharma. Context and dynamics of same-sex behavior among long-distance truckers in India: Findings from qualitiative research. New Delhi: Population Council, 2006.

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Azevedo, Anna Carolina. Dinamite: Uma tragédia em Curitiba. Curitiba, Paraná, Brasil: Governo do Estado do Paraná, Secretaria de Estado da Cultura, 2010.

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A dynamic foundation for fund raising: A guide to organizing or reorganizing an institutionally related foundation. Washington, DC: Council for Advancement and Support of Education, 2004.

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Wo guo hun he zhi yang lao zhi du de ji jin dong tai ping heng yan jiu: A study on dynamic balance of the fund of China's hybrid pension system in transition. Beijing Shi: Zhongguo cai zheng jing ji chu ban she, 2009.

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Bekbasarov, Isabay. Study of the process of driving piles and dies on models. ru: INFRA-M Academic Publishing LLC., 2020. http://dx.doi.org/10.12737/1074097.

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The monograph presents the results of experimental and theoretical studies conducted using models of driven piles and tape dies. The influence of the cross-section size, length, shape of the trunk and the lower end of the piles on their submergability, energy intensity of driving and load-bearing capacity was evaluated. The design and technological features of new types of piles are considered. A method for determining the load-bearing capacity of a pile model based on the results of dynamic tests has been developed. Similarity conditions and formulas are presented that provide modeling of the pile driving process in the laboratory. The influence of the shape of the tape dies on their submersibility, energy consumption of the driving and the bearing capacity of the foundations arranged in the vyshtampovannyh pits was evaluated. The method of determining the load-bearing capacity of a belt Foundation model based on the results of pit vyshtampovyvaniya is described. Recommendations on the choice of optimal parameters of piles and foundations, arranged in vystupovani pits. Recommended for researchers, specialists of design and construction organizations, doctoral students, postgraduates, undergraduates and students of construction and water management specialties.

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Drag Optimization Of Light Trucks Using Computational Fluid Dynamics. Storming Media, 2003.

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Book chapters on the topic "Trucks – Dynamics"

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Filho, Antonio Martins Lima, and Nicolau D. F. Gualda. "Long Haul Trucks Dynamic Assignment with Penalties." In Dynamics in Logistics, 539–47. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11996-5_48.

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Lange, Ann-Kathrin, Fredrik Branding, Tilmann Schwenzow, Constantin Zlotos, Anne Kathrina Schwientek, and Carlos Jahn. "Dispatching Strategies of Drayage Trucks at Seaport Container Terminals with Truck Appointment System." In Dynamics in Logistics, 162–66. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-74225-0_21.

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Suda, Y., R. J. Anderson, and K. Yamada. "Dynamics of Unsymmetric Suspension Trucks With Semiactive Control." In The Dynamics of Vehicles on Roads and on Tracks, 480–96. London: CRC Press, 2021. http://dx.doi.org/10.1201/9781003210900-36.

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Gardella, Michele, and Alberto Martini. "Multibody Models and Simulations to Assess the Stability of Counterbalance Forklift Trucks." In Multibody Dynamics 2019, 526–33. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-23132-3_63.

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Depner, Thomas, Liu Cao, and Hagen Borstell. "PalletAssist - Concept for a Multisensor-Based Assistance System for Safe Handling of Palletized Goods with Forklift Trucks." In Dynamics in Logistics, 462–76. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44783-0_44.

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Suda, Y., R. Nishimura, N. Kato, A. Matsumoto, Y. Sato, H. Ohno, M. Tanimoto, and E. Miyauchi. "Self-steering Trucks Using Unsymmetric Suspension with Independently Rotating Wheels." In The Dynamics of Vehicles on Roads and on Tracks, 180–90. London: CRC Press, 2021. http://dx.doi.org/10.1201/9781003210924-15.

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Kumar, R. Praveen, S. A. Prabhaharan, and G. Vinayagamurthy. "Study on the Effective Platooning of Indian Trucks Using Computational Fluid Dynamics." In Lecture Notes in Mechanical Engineering, 391–98. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0698-4_42.

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Winkler, C. B., and P. S. Fancher. "Directional Dynamics of Multi-Articulated Heavy Trucks Employing Controlled Steering of Dolly Wheels." In The Dynamics of Vehicles on roads and on tracks, 525–34. London: CRC Press, 2021. http://dx.doi.org/10.1201/9781003210894-59.

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Yokose, Keiji. "An Analysis of Running Stability of High Speed Railway Trucks Connected in Series with Elastic and Frictional Forces Working Against Truck Turning." In The Dynamics of Vehicles on roads and on tracks, 543–54. London: CRC Press, 2021. http://dx.doi.org/10.1201/9781003210894-61.

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Fernstrom, Eric V., Tim R. Wank, and Kirk A. Grimmelsman. "Dynamic Testing of a Truss Bridge Using a Vibroseis Truck." In Topics on the Dynamics of Civil Structures, Volume 1, 155–63. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-2413-0_16.

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Conference papers on the topic "Trucks – Dynamics"

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Ahmadian, Mehdi. "Dynamics Analysis of Self-Steering Railway Trucks for Assessing Curving Performance." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-82621.

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The primary purpose of this study is to provide a qualitative analysis of the dynamics of the self-steering trucks that are commonly used for freight locomotives on improving curving performance and increasing adhesion in curves. Although there are a number of anecdotal statements on the ability of steerable trucks to reduce curving forces and increase adhesion in curves, to the best of our knowledge, there exists no study that provides a qualitative or quantitative analysis of these features of steerable trucks. Two aspects of locomotive trucks are essential for their ability to deliver small curving forces and high adhesion in curves. First, the ability to allow the axles to yaw sufficiently relative to the truck frames, such that they can hold a small angle of attack with the rail. Second, to provide sufficiently large longitudinal stiffness between the end axles and the axles and truck frame, in order to accommodate high adhesions. An equivalent stiffness analysis is used to show that the two steerable trucks that are considered for this study are far superior to conventional, three-axle, straight trucks in providing both a smaller angle of attack and a higher longitudinal stiffness for better curving and adhesion characteristics. The qualitative analysis of this study agrees with the experience the railroads have had with their self-steering trucks. The findings of this study indicate that self-steering trucks can result in lower lateral forces, accommodate tighter curves, and deliver higher adhesion in curves; without lowering the critical hunting speed of the locomotive. The results further show that the steering mechanism stiffness can have a large effect on the lateral, longitudinal, and yaw stiffness between the end axles; therefore, significantly lowering curving forces, and increasing adhesion and critical hunting speed of the truck.

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Miyajima, N., A. Matsumoto, Y. Suda, Y. Sato, H. Ohno, Y. Michitsuji, M. Komiyama, et al. "Multibody Dynamics Simulation and Bogie Structure Evaluation for Active-Bogie Steering Truck." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-43336.

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Railway truck is necessary to have excellent curving performance as well as high speed hunting stability, but generally they are contrary to each other. In order to realize the compatibility, many trucks with passive steering mechanism have been studied, and some of them are realized on service operation. In order to realize further improvement of bogie steering ability on sharp curve, active steering control can give effective performance, and is considered as the latest topic. As an example of the active steering bogie, the bogie with actuators between wheelsets and bogie frame is considered. The bogie mechanism realizes effective steering but requires many actuators results in complex mechanism. The truck treated here has simple but effective mechanism: Actuators are attached only between car body and truck frame. When railway trucks negotiate sharp curve running, the rolling radius difference between inside and outside wheels cannot be obtained sufficiently, and the attitude of the truck becomes so-called “insufficient steering condition”. Considering the phenomena, if the truck frame is steered by actuators toward “radial steering position of the truck”, the improvement of curving performance of the truck can be realized. This is the first concept of active-bogie-steering (ABS) truck. In this paper, detailed study and evaluation for ABS (Active-Bogie-Steering) bogie will be presented. Validity tests were carried out with the bogie on rolling test stand in NTSEL (National Traffic Safety and Environment Laboratory), which can simulate curve-running condition including transition curve. Bogie parameters and steering actuator characteristics are elaborately identified in order to compare the experimental results with multi-body dynamics simulation. According to the test results and numerical simulation, the effectiveness of the proposed bogie mechanism and control are proved.

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Esmailzadeh, E., L. Y. Tong, and B. Tabarrok. "Road Vehicle Dynamics of Log Hauling Combination Trucks." In International Truck & Bus Meeting & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1991. http://dx.doi.org/10.4271/912670.

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Albeaik, Saleh, Fang-Chieh Chou, Xiao-Yun Lu, and Alexandre M. Bayen. "Deep Truck : A deep neural network model for longitudinal dynamics of heavy duty trucks." In 2019 IEEE Intelligent Transportation Systems Conference - ITSC. IEEE, 2019. http://dx.doi.org/10.1109/itsc.2019.8917038.

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Williams, Nathan A., Joshua H. Gordis, and Mike Letherwood. "Drag Optimization of Light Trucks Using Computational Fluid Dynamics." In SAE Commercial Vehicle Engineering Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2004. http://dx.doi.org/10.4271/2004-01-2617.

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Sherman, Mark, and George Myers. "Vehicle Dynamics Simulation for Handling Optimization of Heavy Trucks." In International Truck & Bus Meeting & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2000. http://dx.doi.org/10.4271/2000-01-3437.

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Wasfy, Tamer M., Hatem M. Wasfy, and Jeanne M. Peters. "Coupled Multibody Dynamics and Smoothed Particle Hydrodynamics for Predicting Liquid Sloshing for Tanker Trucks." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-35191.

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Multibody dynamics and smoothed particle hydrodynamics (SPH) are integrated into one solver for predicting the dynamic response of tanker trucks. Multibody dynamics techniques are used to model the various vehicle components and connect those components using various types of joints and contact surfaces. A penalty technique is used to impose joint and normal contact constraints (between the tires and ground, and between the tank and the fluid particles). An asperity-based friction model is used to model joint and contact friction. The liquid in the tanks is modeled using an SPH particle-based approach. A contact search algorithm that uses a moving Cartesian Eulerian grid that is fixed to the tank is used to allow fast contact detection between particles. A recursive bounding box contact search algorithm is used to allow fast contact detection between polygonal contact surfaces and the fluid particles. The governing equations of motion for the solid bodies and the fluid particles are solved along with joint/constraint equations using a time-accurate explicit solution procedure. The integrated solver is used to predict the dynamic response of a typical tanker truck performing a braking test with an empty, half-full and full tank. The solver can be used in vehicle design optimization to simulate and evaluate various vehicle designs.

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Tabarrok, B., and X. Tong. "A Computer Simulation Analysis of Road Dynamics of Log Hauling Trucks." In International Truck & Bus Meeting & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1994. http://dx.doi.org/10.4271/942305.

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Vithani, Anand R., Graydon F. Booth, Anand Prabhakaran, Som P. Singh, David C. Brabb, Srinivas Chitti, Monique F. Stewart, and S. K. Punwani. "Freight Truck for Higher Speed Operations." In 2010 Joint Rail Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/jrc2010-36244.

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The current freight railroad operations are restricted to a maximum speed of 80 mph partly due to lateral instability of conventional freight trucks at higher speeds. The three-piece truck, a workhorse of the railroad industry for over 100 years, and its variations are susceptible to hunt at 50–55 mph when empty and 90–100 mph in loaded conditions. Design attempts to increase high-speed stability generally lead to diminished curving performance and increased risk of derailment. In this paper we describe a true pendulum suspension based freight truck that is designed to achieve stable operations up to 150 mph without compromising curving performance. The truck’s performance has been analyzed using an industry standard vehicle dynamics simulation tool. The AAR MSRP M-1001 Chapter 11 ‘Service-Worthiness Tests and Analyses For New Freight Cars’ were used to qualify the design where applicable. Traditional tread brakes are supplemented with axle-mounted disc brakes to provide safe braking capabilities beyond 110 mph. Two full-size 70-ton prototypes have been assembled using off-the-shelf and fabricated components. Yard tests have shown that the truck curves properly even under very tight curving conditions.

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El-Demerdash, S. M. "Improvement of Trucks Ride Dynamics Using a Hydraulic Semi-Active Suspension System." In International Truck & Bus Meeting & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2002. http://dx.doi.org/10.4271/2002-01-3039.

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Reports on the topic "Trucks – Dynamics"

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Swanson, Andrew D., Wayne Yuen, and John R. Mackaman. Space Truss Zero Gravity Dynamics. Fort Belvoir, VA: Defense Technical Information Center, March 1993. http://dx.doi.org/10.21236/ada266130.

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A STUDY OF COLLAPSE SUSCEPTIBILITY AND RESISTANCE OF LOADED CABLE-SUPPORTED PIPE STRUCTURE SUBJECT TO A SUDDEN BREAK OF CABLE MEMBER. The Hong Kong Institute of Steel Construction, September 2021. http://dx.doi.org/10.18057/ijasc.2021.17.3.7.

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Cable-supported pipe system (CSPS) provides a suitable system of structure for meeting the stringent structural requirements of pipeline bridges. However, due to a composite action of cable with truss and pipe members, the sudden failure of its structural member may lead to undesired vibratory response and collapse. The occurrence of a sudden break of the CSPS structural member is characterized by spontaneous dynamics and internal force rearrangement. The present study aims to investigate parametrically the collapse susceptibility and resistance of scaled down CSPS model in the event of a sudden break of the cable member by combined experimental and numerical procedures. The displacement of the structure, the pattern of internal force rearrangement, and dynamic responses were comparatively evaluated. Experimental results depict imminent cable failure under load and attendant dynamic response, but without a total collapse of the CSPS structure. Critical members causing large dynamic response amplitudes were identified and the mitigation of collapse was evaluated. Dynamic increasing factor (DIF) methods was utilized for the evaluation of the dynamic response of the sudden cable break resulting from the pattern of responses between the cable members and the rest of the CSPS structure. Comparison with provisions in other studies shows higher values DIF of the CSPS cable members which led to proposed evaluation using dynamic factor (DF). Thus, the dynamic factors for the sudden break of various cable members along the span and the errors were also estimated considering the parametric of design variables which will enable easy utilization during the structural process of CSPS.

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STUDY ON FORCE MECHANISM OF CABLE-TRUSS FRAME AND JUMPED LAYOUT OF ANNULAR CROSSED CABLE-TRUSS STRUCTURE. The Hong Kong Institute of Steel Construction, September 2021. http://dx.doi.org/10.18057/ijasc.2021.17.3.3.

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A new type of cable-strut tension structure named Annular Crossed Cable-truss Structure(ACCTS) comprises a series of planar cable-truss frames crossed each other. To investigate the force mechanism of ACCTS, a cable-truss frame model with 2-bar and 6-cable has been developed, and its initial stiffness formula has been derived as well. The model is further simplified to make it is upper and lower vector heights equal, and then the initial stiffness formula and the critical slack load formula are further deduced. Based on ANSYS software and cable-truss frame with a span of 60m, the influences of the number of struts and position of jumped layout on the cable-truss frame are studied. According to the former 60m span cable-truss frame's research results, the jumped layout of ACCTS with a span of 100m is studied. The static and dynamic performances of two schemes, the optimal jumped layout scheme and the original scheme, are systematically studied. It is shown that the number of struts would be about 6~8 for the planar cable-truss frame and the optimal order of jumped layout is strut 6-7→strut 4-5→strut 2-3. The optimal order of jumped layout of ACCTS agrees with that of the cable-truss frame, verifying the feasibility of conclusions. In the condition of no variation in the original structure's static and dynamic performance, the optimal scheme of the jumped layout will lower the steel consumption and enhance the buckling loads. Moreover, it also simplifies structure for easy construction.

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Context and dynamics of same-sex behavior among long-distance truckers in India: Findings from qualitative research. Population Council, 2006. http://dx.doi.org/10.31899/hiv13.1013.

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Context and dynamics of male-to-male sexual behavior of truckers in India: Findings from a multi-site qualitative research study. Population Council, 2006. http://dx.doi.org/10.31899/hiv13.1014.

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