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Статті в журналах з теми "Forced Responce Analysis"

Автор: Grafiati

Опубліковано: 10 березня 2023

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1

Nikolic, M., E. P. Petrov, and D. J. Ewins. "Coriolis Forces in Forced Response Analysis of Mistuned Bladed Disks." Journal of Turbomachinery 129, no. 4 (2006): 730–39. http://dx.doi.org/10.1115/1.2720866.

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Анотація:

The problem of estimating the mutual interaction of the effects of Coriolis forces and of blade mistuning on the vibration characteristics of bladed disks is addressed in this paper. The influence of different degrees of mistuning on forced response and amplification factors are studied in the presence of Coriolis forces and then compared to their non-Coriolis counterparts using a computationally inexpensive, yet representative, model of a bladed disk. The primary objective of the study reported in this paper is to establish whether current mistuned bladed disk analyses should incorporate Cori

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2

Setúbal, Fábio Antônio do Nascimento, Sérgio de Souza Custódio Filho, Newton Sure Soeiro, Alexandre Luiz Amarante Mesquita, and Marcus Vinicius Alves Nunes. "Force Identification from Vibration Data by Response Surface and Random Forest Regression Algorithms." Energies 15, no. 10 (2022): 3786. http://dx.doi.org/10.3390/en15103786.

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Several dynamic projects and fault diagnosis of mechanical structures require the knowledge of the acting external forces. However, the measurement of such forces is often difficult or even impossible; in such cases, an inverse problem must be solved. This paper proposes a force identification method that uses the response surface methodology (RSM) based on central composite design (CCD) in conjunction with a random forest regression algorithm. The procedure initially required the finite element modal model of the forced structure. Harmonic analyses were then performed with varied parameters o

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3

Saito, Akira, and Tatsuya Suzuki. "Forced response vibration analysis of induction motor stators induced by electromagnetic forces." IFAC-PapersOnLine 55, no. 27 (2022): 155–59. http://dx.doi.org/10.1016/j.ifacol.2022.10.504.

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4

Mitra, Anirban, Prasanta Sahoo, and Kashinath Saha. "Large Amplitude Forced Vibration Analysis of Stiffened Plates Under Harmonic Excitation." International Journal of Manufacturing, Materials, and Mechanical Engineering 1, no. 2 (2011): 62–98. http://dx.doi.org/10.4018/ijmmme.2011040105.

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Large amplitude forced vibration behaviour of stiffened plates under harmonic excitation is studied numerically incorporating the effect of geometric non-linearity. The forced vibration analysis is carried out in an indirect way in which the dynamic system is assumed to satisfy the force equilibrium condition at peak excitation amplitude. Large amplitude free vibration analysis of the same system is carried out separately to determine the backbone curves. The mathematical formulation is based on energy principles and the set of governing equations for both forced and free vibration problems de

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5

david Logan, J. "Forced response of a linear hyperbolic system." Applicable Analysis 33, no. 3-4 (1989): 255–66. http://dx.doi.org/10.1080/00036818908839877.

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6

Ma, Yong Jie, Yi Du Zhang, and Xiao Ci Zhao. "Cutting Force Model of Aluminum Alloy 2014 in Turning with ANOVA Analysis." Applied Mechanics and Materials 42 (November 2010): 242–45. http://dx.doi.org/10.4028/www.scientific.net/amm.42.242.

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Анотація:

In the present study, aluminum alloy 2014 was selected as workpiece material, cutting forces were measured under turning conditions. Cutting parameters, the depth of cut, feed rate, the cutting speed, were considered to arrange the test research. Mathematical model of turning force was solved through response surface methodology (RSM). The fitting of response surface model for the data was studied by analysis of variance (ANOVA). The quadratic model of RSM associated with response optimization technique and composite desirability was used to find optimum values of machining parameters with res

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7

Jahng, Junghoon, Eric O. Potma, and Eun Seong Lee. "Nanoscale spectroscopic origins of photoinduced tip–sample force in the midinfrared." Proceedings of the National Academy of Sciences 116, no. 52 (2019): 26359–66. http://dx.doi.org/10.1073/pnas.1913729116.

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Анотація:

When light illuminates the junction formed between a sharp metal tip and a sample, different mechanisms can contribute to the measured photoinduced force simultaneously. Of particular interest are the instantaneous force between the induced dipoles in the tip and in the sample, and the force related to thermal heating of the junction. A key difference between these 2 force mechanisms is their spectral behavior. The magnitude of the thermal response follows a dissipative (absorptive) Lorentzian line shape, which measures the heat exchange between light and matter, while the induced dipole respo

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8

You, Tian Qing, Jia Zhong Zhang, and Cong Wang. "Water Exit Dynamic Analysis of Underwater Vehicle." Applied Mechanics and Materials 50-51 (February 2011): 649–53. http://dx.doi.org/10.4028/www.scientific.net/amm.50-51.649.

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The cavity, formed at the nose part of underwater launched vehicle due to the high launching velocity, will collapse while crossing water free surface and has a great impact on the strength of vehicle structure. In order to study the effect of the cavity collapse to vehicle structure, water exit dynamic analysis has been conducted. Before that, the computational model has been established. The external load, caused by cavity collapse, is assumed to be concentrated pulse forces applied on the vehicle at different time. And the flight vehicle structure is simplified into a free-free Timoshenko b

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9

Alligné, S., P. C. O. Silva, A. Béguin, et al. "Forced response analysis of hydroelectric systems." IOP Conference Series: Earth and Environmental Science 22, no. 4 (2014): 042001. http://dx.doi.org/10.1088/1755-1315/22/4/042001.

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10

Zirkelback, Nicole, and Luis San Andre´s. "Finite Element Analysis of Herringbone Groove Journal Bearings: A Parametric Study." Journal of Tribology 120, no. 2 (1998): 234–40. http://dx.doi.org/10.1115/1.2834415.

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Анотація:

Currently, the herringbone groove journal bearing (HGJB) has important applications in miniature rotating machines such as those found in the computer information storage industry. Grooves scribed on either the rotating or stationary member of the bearing pump the lubricating fluid inward thus generating support stiffness and improving its dynamic stability when operating concentrically. The narrow groove theory (NGT), traditionally adopted to model the concentric operation of these bearings, is limited to bearings with a large number of grooves. A finite element analysis is introduced for pre

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11

He, Jian, Yu Jiang, Qichao Xue, Chunwei Zhang, and Jingcai Zhang. "Energy response analysis of adjacent structures with polymer bumpers under seismic loadings." Advances in Mechanical Engineering 10, no. 12 (2018): 168781401880915. http://dx.doi.org/10.1177/1687814018809157.

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Insufficient gap between adjacent buildings may lead serious poundings under seismic loadings. Installing polymer bumpers may decrease the pounding forces between colliding buildings, which can prevent column yielding from overlarge shearing forces. This article focuses on the analysis on energy responses of adjacent structures equipped with polymer bumpers. Based on a novel pounding analysis method, systematic comparisons of structural pounding performance are conducted and specific results are obtained and discussed. First, time history responses for pounding force, displacements, and yieldi

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12

Cenedese, Mattia, and George Haller. "How do conservative backbone curves perturb into forced responses? A Melnikov function analysis." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 476, no. 2234 (2020): 20190494. http://dx.doi.org/10.1098/rspa.2019.0494.

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Анотація:

Weakly damped mechanical systems under small periodic forcing tend to exhibit periodic response in a close vicinity of certain periodic orbits of their conservative limit. Specifically, amplitude-frequency plots for the conservative limit have often been noted, both numerically and experimentally, to serve as backbone curves for the near resonance peaks of the forced response. In other cases, such a relationship between the unforced and forced response was not observed. Here, we provide a systematic mathematical analysis that predicts which members of conservative periodic orbit families will

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13

Yao, Donghui, Yongsheng Ren, Yuhuan Zhang, and Bole Ma. "Nonlinear Dynamics of Cutting Process considering Higher-Order Deformation of Composite Cutting Tool." Shock and Vibration 2021 (December 2, 2021): 1–23. http://dx.doi.org/10.1155/2021/8699218.

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In this paper, the nonlinear dynamic analysis of the cutting process of composite cutting tool is performed. The cutting tool is simplified to a nonplanar bending rotating shaft. The higher-order bending deformation, structural damping, and gyroscopic effect of cutting tool are considered. It is assumed that cutting tool is subjected to a regenerative two-dimensional cutting force containing the first and second harmonic components. Based on the Hamilton principle, the motion equation of nonlinear chatter of the cutting system is derived. The nonlinear ordinary differential equations in the ge

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14

Wang, X. M., and M. L. Spaulding. "A Two-Dimensional Potential Flow Model of the Wave Field Generated by a Semisubmerged Body in Heaving Motion." Journal of Ship Research 32, no. 02 (1988): 83–91. http://dx.doi.org/10.5957/jsr.1988.32.2.83.

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Анотація:

A two-dimensional potential flow model is formulated to predict the wave field and forces generated by a sere!submerged body in forced heaving motion. The potential flow problem is solved on a boundary fitted coordinate system that deforms in response to the motion of the free surface and the heaving body. The full nonlinear kinematic and dynamic boundary conditions are used at the free surface. The governing equations and associated boundary conditions are solved by a second-order finite-difference technique based on the modified Euler method for the time domain and a successive overrelaxatio

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15

Berthillier, M., C. Dupont, R. Mondal, and J. J. Barrau. "Blades Forced Response Analysis With Friction Dampers." Journal of Vibration and Acoustics 120, no. 2 (1998): 468–74. http://dx.doi.org/10.1115/1.2893853.

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Анотація:

A multiharmonic frequency domain analysis combined with a Craig-Bampton component mode synthesis is presented to compute the dry friction damped forced response of blades. The accuracy of the analysis is established, for a cantilever beam with a dry friction damper attached, by comparison with experimental results and time domain analysis. The method has then been applied to a model fan blade damped by a blade to ground damper.

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16

Chiang, Hsiao-Wei D., and R. E. Kielb. "An Analysis System for Blade Forced Response." Journal of Turbomachinery 115, no. 4 (1993): 762–70. http://dx.doi.org/10.1115/1.2929314.

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Анотація:

A frequent cause of turbomachinery blade failure is excessive resonant response. The most common excitation source is the nonuniform flow field generated by inlet distortion, wakes and/or pressure disturbances from adjacent blade rows. The standard method for dealing with this problem is to avoid resonant conditions using a Campbell diagram. Unfortunately, it is impossible to avoid all resonant conditions. Therefore, judgments based on past experience are used to determine the acceptability of the blade design. A new analysis system has been developed to predict blade forced response. The syst

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17

HSUEH, W. J. "FORCED RESPONSE ANALYSIS FOR MULTI-LAYERED STRUCTURES." Journal of Sound and Vibration 227, no. 1 (1999): 222–29. http://dx.doi.org/10.1006/jsvi.1999.2362.

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18

Vuksanović Herceg, Iva, Vukašin Kuč, Veljko M. Mijušković, and Tomislav Herceg. "Challenges and Driving Forces for Industry 4.0 Implementation." Sustainability 12, no. 10 (2020): 4208. http://dx.doi.org/10.3390/su12104208.

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Анотація:

Industry 4.0 has been a major force framing the societal, economic and technological environment after 2010. Exposed to ongoing digital transformation, companies are able to exploit opportunities offered by Industry 4.0, and are forced to manage immanent risks and barriers. However, studies on opportunities and challenges relevant for the implementation of Industry 4.0 for companies are scarce. In response to this literature gap, the aim of this exploratory research is to provide a deeper analysis of the level of digital transformation of companies in Serbia based on a digital maturity model,

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19

Lu, Kai Bo, Min Qing Jing, Heng Liu, and Chun Xiao Cong. "Dynamic Analysis of Slender Shaft in Twin-Spindle Turning." Applied Mechanics and Materials 48-49 (February 2011): 448–54. http://dx.doi.org/10.4028/www.scientific.net/amm.48-49.448.

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Анотація:

Machining slender workpiece is still a technical difficulty. This paper investigates the dynamic behavior of a slender shaft subject to constant feedrate moving cutting forces in twin-spindle turning process. The Euler-Bernoulli theory is used to model the rotating shaft. A dynamic cutting force model is formulated considering the flexibility of workpiece and rigid machine tool. The modal analysis method is employed to solve the dynamic response of the shaft. The parametric influence to the response and natural frequencies of shaft is discussed. Finally, the results are presented and compared

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20

Li, Jun Qiang, Yi Fan Li, and Yong Peng. "Theoretical Analysis of Seismic Response for Marine Drilling Risers." Applied Mechanics and Materials 423-426 (September 2013): 1531–36. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.1531.

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With the continuous development of the marine oil industry, risers have become necessary equipment in offshore drilling engineering. On the basis of mode-superposition response spectrum method which is used commonly in anti-seismic design, the seismic responses of the marine drilling riser is analyzed on the theoretical and the related anti-seismic calculation formulas of the discrete system are promoted to the continuous system. The earthquake force and the resultant internal forces when the earthquake happening are analyzed and calculated. The calculation formulas of shear force and bending

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21

Trąbka, Arkadiusz. "Effect of Pulse Shape and Duration on Dynamic Response of a Forging System." Acta Mechanica et Automatica 13, no. 4 (2019): 226–32. http://dx.doi.org/10.2478/ama-2019-0030.

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Abstract Forging hammers are machines whose operation causes negative effects both at the place of their foundation (the soil settlement) and in their surroundings (e.g., vibrations propagating to the other devices, noise, etc.). Knowledge of the parameters characterizing the time history of the force that arises as a result of impact of a ram on a shaped material is of fundamental importance for the correct analysis of both the structure of the hammer and its impact on the surroundings. In the paper, the effect of the shape and duration of a pulse load on the dynamic response of a hammer-foun

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22

Petrov, E. P., and D. J. Ewins. "Advanced Modeling of Underplatform Friction Dampers for Analysis of Bladed Disk Vibration." Journal of Turbomachinery 129, no. 1 (2006): 143–50. http://dx.doi.org/10.1115/1.2372775.

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Advanced structural dynamic models for both wedge and split underplatform dampers have been developed. The new damper models take into account inertia forces and the effects of normal load variation on stick-slip transitions at the contact interfaces. The damper models are formulated for the general case of multiharmonic forced response analysis. An approach for using the new damper models in the dynamic analysis of large-scale finite element models of bladed disks is proposed and realized. Numerical investigations of bladed disks are performed to demonstrate the capabilities of the new models

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23

Brown, Jeffrey M., and Ramana V. Grandhi. "Reduced-Order Model Development for Airfoil Forced Response." International Journal of Rotating Machinery 2008 (2008): 1–12. http://dx.doi.org/10.1155/2008/387828.

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Анотація:

Two new reduced-order models are developed to accurately and rapidly predict geometry deviation effects on airfoil forced response. Both models have significant application to improved mistuning analysis. The first developed model integrates a principal component analysis approach to reduce the number of defining geometric parameters, semianalytic eigensensitivity analysis, and first-order Taylor series approximation to allow rapid as-measured airfoil response analysis. A second developed model extends this approach and quantifies both random and bias errors between the reduced and full models

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24

Yildirim, Kenan, and Sertan Alkan. "Dynamic Response Analysis of a Forced Fractional Viscoelastic Beam ∗." Journal of Mathematics 2021 (December 15, 2021): 1–10. http://dx.doi.org/10.1155/2021/3920937.

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In this paper, dynamic response analysis of a forced fractional viscoelastic beam under moving external load is studied. The beauty of this study is that the effect of values of fractional order, the effect of internal damping, and the effect of intensity value of the moving force load on the dynamic response of the beam are analyzed. Constitutive equations for fractional order viscoelastic beam are constructed in the manner of Euler–Bernoulli beam theory. Solution of the fractional beam system is obtained by using Bernoulli collocation method. Obtained results are presented in the tables and

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25

Wang, Haifei, and Junjie Gong. "Dynamic analysis of coupling misalignment and unbalance coupled faults." Journal of Low Frequency Noise, Vibration and Active Control 38, no. 2 (2019): 363–76. http://dx.doi.org/10.1177/1461348418821582.

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Misalignment is a common fault occurring in the rotor system. However, the response characteristics have not been understood comprehensively, especially the relation between forces or torques and displacements, accelerations, or moments. First, misalignment modeling is investigated in this paper. Two coupled rotor system is modeled by six degrees of freedom. Misalignment effects are considered at coupling location using nodal force vectors and moment vectors. Second, Newmark- β method is used to solve the nonlinear equations. Acceleration, displacement, and force or moment response characteris

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26

Goel, Rakesh K., and Anil K. Chopra. "Extension of Modal Pushover Analysis to Compute Member Forces." Earthquake Spectra 21, no. 1 (2005): 125–39. http://dx.doi.org/10.1193/1.1851545.

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This paper extends the modal pushover analysis (MPA) procedure for estimating seismic deformation demands for buildings to compute member forces. Seismic demands are computed for six buildings, each analyzed for 20 ground motions. A comparison of seismic demands computed by the MPA and nonlinear response history analysis (RHA) demonstrates that the MPA procedure provides good estimates of the member forces. The bias (or error) in forces is generally less than that noted in earlier investigations of story drifts and is comparable to the error in the standard response spectrum analysis (RSA) for

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27

Petrov, E. P. "Method for Direct Parametric Analysis of Nonlinear Forced Response of Bladed Disks With Friction Contact Interfaces." Journal of Turbomachinery 126, no. 4 (2004): 654–62. http://dx.doi.org/10.1115/1.1776588.

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Анотація:

An effective method for direct parametric analysis of periodic nonlinear forced response of bladed disks with friction contact interfaces has been developed. The method allows, forced response levels to be calculated directly as a function of contact interface parameters such as the friction coefficient, contact surface stiffness (normal and tangential coefficients), clearances, interferences, and the normal stresses at the contact interfaces. The method is based on exact expressions for sensitivities of the multiharmonic interaction forces with respect to variation of all parameters of the fr

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28

Kubur, M., A. Kahraman, D. M. Zini, and K. Kienzle. "Dynamic Analysis of a Multi-Shaft Helical Gear Transmission by Finite Elements: Model and Experiment." Journal of Vibration and Acoustics 126, no. 3 (2004): 398–406. http://dx.doi.org/10.1115/1.1760561.

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A dynamic model of a multi-shaft helical gear reduction unit formed by N flexible shafts is proposed in this study. The model consists of a finite element model of shaft structures combined with a three-dimensional discrete model of helical gear pairs. Bearing and housing flexibilities are included in the model as well. Eigenvalue solution and the Modal Summation Technique are used to predict the free and forced vibrations of the system. Results of experimental study on a helical gear-shaft-bearing system are also presented for validation of the model. It is demonstrated that the predictions m

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29

Li, Qi Zhen, Hong Quan Li, and Zhi Qian Zhang. "Response Analysis of Bridge across Seismic Fault Zone." Applied Mechanics and Materials 178-181 (May 2012): 2224–27. http://dx.doi.org/10.4028/www.scientific.net/amm.178-181.2224.

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Through simulating the happening location of the fault zone, the structure model is duly simplified, analysing the forced deformation law of the bridge surface with different fault zone position. Because of statically indeterminate structure, continuous beam shall be produced larger additional moment, shear force and torque as a result of displacement in bridge pier, additional stress will be increased with the the increasement of fault zone displacement, especially for the top surface parts of bridge pier. Hence, the corresponding position of the structure and construction measures for reinfo

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30

Calleja, Renato C., Alessandra Celletti, Livia Corsi, and Rafael de la Llave. "Response Solutions for Quasi-Periodically Forced, Dissipative Wave Equations." SIAM Journal on Mathematical Analysis 49, no. 4 (2017): 3161–207. http://dx.doi.org/10.1137/151005397.

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31

Wang, Jing, Huijuan Wei, and Xindong Xu. "Response solutions for quasi-periodically forced harmonic oscillators in Gevrey class." Journal of Differential Equations 355 (May 2023): 296–333. http://dx.doi.org/10.1016/j.jde.2023.01.034.

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32

Ryu, Bong Jo, Hee Jung Kim, and Young Shik Kim. "Dynamic Response and Vibration of a Cantilevered Beam under an Accelerated Moving Mass." Advanced Materials Research 711 (June 2013): 305–11. http://dx.doi.org/10.4028/www.scientific.net/amr.711.305.

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Анотація:

In this research we investigate dynamic responses and vibration of a cantilevered beam subjected to a moving mass with variable speeds. Governing equations of motion under a moving mass are derived by Galerkin's mode summation method considering the effects of all forces acting on the beam (gravity force, Coriolis force, inertia force caused by a slope of the beam, and transverse inertia of the beam). A Runge-Kutta integration method is then applied to calculate dynamic responses of the beam. The effects of the speed, acceleration and the magnitude of the moving mass on the response of the bea

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33

Ding, Yue, Xi Bin Wang, Li Jing Xie, and Hao Yang. "Modeling and Analysis of Cutting Forces in Hard Turning T250 Steel Using CBN Tools." Advanced Materials Research 154-155 (October 2010): 694–700. http://dx.doi.org/10.4028/www.scientific.net/amr.154-155.694.

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Анотація:

The objective of this paper is to study the cutting forces in hard turning T250 steel with CBN tools. Experiments based on the Box-Behnken design were conducted to develop the cutting forces models by response surface methodology (RSM). Significance tests of the model are performed by the analysis of variance (ANOVA). It is also discussed the effects of cutting parameters (cutting speed, feed rate and depth of cut) on the cutting force components. The results show that the models can fit experimental data via analysis of variance. The most important cutting parameter is depth of cut, followed

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34

Zhang, Ningyuan, Bin Luo, Haixia Liu, and Minquan Zhang. "Prestress Self-Equilibrium Force-Finding Method for Cable-Supported Grid Structures Considering Zero-Stress State Form-Finding and the Construction Process." Buildings 12, no. 6 (2022): 749. http://dx.doi.org/10.3390/buildings12060749.

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Анотація:

The cable-supported grid structure (CSGS) is a hybrid structure combined with rigidity and flexibility. Its formed state is closely related to the zero-stress state, construction process, and prestress distribution. The prestress self-equilibrium force-finding method is proposed in this paper to continuously conduct zero-stress state form-finding, the construction process, and prestress state force-finding analysis. As the first engineering project adapting CSGS with an internal compression ring, Shanghai Pudong Football Stadium was taken as the analysis object. The structural finite element m

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35

Petrov, E. P., and D. J. Ewins. "Effects of Damping and Varying Contact Area at Blade-Disk Joints in Forced Response Analysis of Bladed Disk Assemblies." Journal of Turbomachinery 128, no. 2 (2005): 403–10. http://dx.doi.org/10.1115/1.2181998.

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Анотація:

An approach is developed to analyze the multiharmonic forced response of large-scale finite element models of bladed disks taking account of the nonlinear forces acting at the contact interfaces of blade roots. Area contact interaction is modeled by area friction contact elements which allow for friction stresses under variable normal load, unilateral contacts, clearances, and interferences. Examples of application of the new approach to the analysis of root damping and forced response levels are given and numerical investigations of effects of contact conditions at root joints and excitation

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36

Troesch, Armin W., and Jeffrey M. Falzarano. "Modern Nonlinear Dynamical Analysis of Vertical Plane Motion of Planing Hulls." Journal of Ship Research 37, no. 03 (1993): 189–99. http://dx.doi.org/10.5957/jsr.1993.37.3.189.

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When operating in a seaway, high-speed planing hulls exhibit strong nonlinearities. This paper investigates the vertical plane dynamic stability and response associated with such craft. Explicit expressions for the hydrodynamic forces are developed and modern methods of dynamical systems analysis are applied. An illustrative example is given in which the forced and unforced motions are examined. Parameter studies relating to the following topics are made: the onset of porpoising, the magnitude of motions while porpoising, and forced motions due to regular waves. It is found that while nonlinea

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37

Zhao, Dong Xiao, Jun Jie Wang, and Jun Sheng Su. "Seismic Response Analysis of Deep Water Bridges with Pile Group Foundations." Applied Mechanics and Materials 580-583 (July 2014): 1494–98. http://dx.doi.org/10.4028/www.scientific.net/amm.580-583.1494.

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In this paper, we intended to replace the fluid-structure interaction of deep water bridge piers with acceleration-dependent forces during an earthquake. The hydrodynamic pressure on bridge pier groups under seismic excitation is studied using the finite volume method. Different seismic waves with various spectrum components are selected in order to cover frequently encountered cases. The calculated forces of these cylinders are fitted into the Morison equation, and by calculation, the drag force term is negligible, thus the effect of fluid is converted into one added mass term. The paper furt

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38

Chiang, Hsiao-Wei D., and Sanford Fleeter. "Analysis of forced response of detuned blade rows." Journal de Physique III 2, no. 4 (1992): 527–44. http://dx.doi.org/10.1051/jp3:1992146.

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39

Gill, M. B. "The non-consequentialist moral force of promises: a response to Sinnott-Armstrong." Analysis 72, no. 3 (2012): 506–13. http://dx.doi.org/10.1093/analys/ans072.

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40

Katrín Hákonardóttir, Guðlaug, Pablo López-Ceballos, Alejandra Donají Herrera-Reyes, Raibatak Das, Daniel Coombs, and Guy Tanentzapf. "In vivo quantitative analysis of Talin turnover in response to force." Molecular Biology of the Cell 26, no. 22 (2015): 4149–62. http://dx.doi.org/10.1091/mbc.e15-05-0304.

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Cell adhesion to the extracellular matrix (ECM) allows cells to form and maintain three-dimensional tissue architecture. Cell–ECM adhesions are stabilized upon exposure to mechanical force. In this study, we used quantitative imaging and mathematical modeling to gain mechanistic insight into how integrin-based adhesions respond to increased and decreased mechanical forces. A critical means of regulating integrin-based adhesion is provided by modulating the turnover of integrin and its adhesion complex (integrin adhesion complex [IAC]). The turnover of the IAC component Talin, a known mechanose

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41

Saatcioglu, Murat, and JagMohan Humar. "Dynamic analysis of buildings for earthquake-resistant design." Canadian Journal of Civil Engineering 30, no. 2 (2003): 338–59. http://dx.doi.org/10.1139/l02-108.

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The proposed 2005 edition of the National Building Code of Canada specifies dynamic analysis as the preferred method for computing seismic design forces and deflections, while maintaining the equivalent static force method for areas of low seismicity and for buildings with certain height limitations. Dynamic analysis procedures are categorized as either linear (elastic) dynamic analysis, consisting of the elastic modal response spectrum method or the numerical integration linear time history method, or nonlinear (inelastic) response history analysis. While both linear and nonlinear analyses re

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42

Fujii. "Prediction of the Maximum Seismic Member Force in a Superstructure of a Base-Isolated Frame Building by using Pushover Analysis." Buildings 9, no. 9 (2019): 201. http://dx.doi.org/10.3390/buildings9090201.

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It is essential for the seismic design of a base-isolated building that the seismic response of the superstructure remains within the elastic range. The evaluation of the maximum seismic member force in a superstructure is thus an important issue. The present study predicts the maximum seismic member force of five- and fourteen-story reinforced concrete base-isolated frame buildings adopting pushover analysis. In the first stage of the study, the nonlinear dynamic (time-history) analysis of the base-isolated frame buildings is carried out, and the nonlinear modal responses of the first and sec

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43

Liao, C. L., and J. S. Tsai. "Dynamic Response Analysis in End Milling Using Pretwisted Beam Finite Element." Journal of Vibration and Acoustics 117, no. 1 (1995): 1–10. http://dx.doi.org/10.1115/1.2873862.

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This paper develops an analytical model to estimate the dynamic responses in end milling, i.e., dynamic milling cutter deflections and cutting forces, by using the finite element method along with an adequate end milling cutting force model. The whole cutting system includes spindle, bearings and cutter. The spindle is structurally modeled with the Timoshenko-beam element, the milling cutter with the pretwisted Timoshenko-beam element due to its special geometry, and the bearings with lumped springs and dampers. Because the damping matrix in the resulting finite element equation of motion for

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44

Jana, Tamonash, Anirban Mitra, and Prasanta Sahoo. "Dynamic analysis of elastically and plastically graded spherical and cylindrical contact." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 233, no. 11 (2019): 1712–28. http://dx.doi.org/10.1177/1350650119841756.

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A dynamic analysis of a hemispherical and cylindrical contact, material properties of which are graded elastically and plastically along the radius, is presented. The static force–displacement behavior of a hemisphere and a semi-cylinder in contact with a rigid flat is obtained using finite element software. The force–displacement is used in a further dynamic analysis for undamped-free as well as for forced-damped vibration of the contact interface. For the undamped free vibration, variation of natural frequency w.r.t. initial displacement is furnished for different values of elastic and plast

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45

Vlahopoulos, Nickolas, Yury Kalish, and S. T. Raveendra. "Development of an Equivalent Force Method and an Application in Simulating the Radiated Noise from an Operating Diesel Engine." Shock and Vibration 6, no. 3 (1999): 113–23. http://dx.doi.org/10.1155/1999/323427.

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In this paper a new methodology is presented for applying measured accelerations and forces as excitation on a structural finite element model in order to perform a forced frequency response analysis. The computed vibration constitutes the excitation for an acoustic boundary element analysis. The new developments presented in this paper are associated with: the equivalent force method that can prescribe the acceleration at certain parts of the structure; the integration within a single process of test data that define the excitation, with the vibration analysis, and the acoustic prediction; th

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46

Aseel Mohammed Ali Hussein. "MECHANICAL ANALYSIS OF ORTHODONTIC WIRES." Diyala Journal of Engineering Sciences 5, no. 1 (2012): 172–80. http://dx.doi.org/10.24237/djes.2012.05114.

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Orthodontic tooth movement is a physiologic response to externally applied forces; the motive forces are primarily mechanical. The optimal application of orthodontic force enables maximum movement of teeth with minimal irreversible damage of the periodontal ligament (PDL), alveolar bone, and teeth. Since arch wires are the main force system in orthodontics, it is important in clinical practice that they deliver appropriate, predictable and repeatable forces during treatment. These specialized wires even promise shape memory properties and the possibility of super elastic behavior, which signif

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47

Park, Min Su, Young Taek Kim, Sangki Park, and Jiyoung Min. "Time Response Analysis of Caissons by Installing New Caisson on Existing Caisson Breakwater in Irregular Wave Condition." Journal of Korean Society of Coastal and Ocean Engineers 34, no. 6 (2022): 233–46. http://dx.doi.org/10.9765/kscoe.2022.34.6.233.

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The design and the construction were carried out by installing new caissons on the back or the front of existing caissons to increase the structural stability of caisson breakwaters. In this study, we used the ANSYS AQWA program to analyze the wave forces acting on individual caissons according to the effects of wave-structure interaction when new caissons were additionally installed on existing caisson breakwaters. The wave force characteristics acting on the individual caisson were analyzed according to the distance among caissons in frequency domain analysis. In addition, the dynamic wave f

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48

Zhang, Zheng Mei, Bao Liang Xing, Jing Wang, Hui Ying Cao, and Shao Hua Li. "Fractal Characterization Analysis in CNC Milling Aluminium Alloy." Key Engineering Materials 748 (August 2017): 212–17. http://dx.doi.org/10.4028/www.scientific.net/kem.748.212.

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Based on the experiment of milling aluminium alloy (7075-T651), the relations between the fractal dimensions of cutting forces with machining parameters are studied. Cutting speed, feed speed and cutting depth are considered as the process parameters. The cutting force in milling aluminium alloy operation are measured and the fractal dimension are calculated using the algorithm of correlation dimension. From main effect plots the fractal dimensions of three directions of cutting forces are reduced with the increase of cutting speed and increased with the increase of feed speed and cutting dept

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49

Maslen, E. H., C. K. Sortore, J. A. Va´zquez, and C. R. Knospe. "Synchronous Response Estimation in Rotating Machinery." Journal of Engineering for Gas Turbines and Power 124, no. 2 (2002): 357–62. http://dx.doi.org/10.1115/1.1417482.

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Synchronous response estimation attempts to determine the forced response (displacement) of a rotor at critical points which cannot be measured directly. This type of prediction, if accurate and reliable, has broad potential use in the rotating machinery industry. Many machines have close clearance points on their shafts, such as seals, which can easily be damaged by excess vibration. Accurate estimates of the actual level of vibration at these points could usefully assist machine operators in troubleshooting and in protecting the equipment from expensive damage. This type of response informat

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50

Huang, Dishan, and Hexi Shao. "Computation Method for Forced Vibration Response of a Multiple DOF Parametric System." International Journal of Structural Stability and Dynamics 20, no. 11 (2020): 2050126. http://dx.doi.org/10.1142/s0219455420501266.

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In this paper, a mathematical approach is presented for the forced vibration analysis of a multiple DOF system that is governed by ordinary differential equations with both time-periodic stiffness and external force that have different periods. Based on an equivalent dynamic system, a closed-form solution, i.e. a special trigonometric series, is presented for the forced vibration response of the system. Computation is realized by applying the harmonic balance operation, and the parametric vibration equation is converted into a set of infinite-order linear algebraic equations. Based on the phys

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