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Journal articles on the topic 'Fixed beam moving stage'

Author: Grafiati

Published: 6 September 2023

Last updated: 31 July 2025

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1

Khodadad, Iman, Nathan Nelson-Fitzpatrick, Kevin Burcham, Arsen Hajian, and Simarjeet S. Saini. "Electron beam lithography using fixed beam moving stage." Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena 35, no. 5 (2017): 051601. http://dx.doi.org/10.1116/1.4997018.

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2

Mere, Viphretuo, and Shankar Kumar Selvaraja. "Method to fabricate taper waveguide using fixed-beam moving stage electron-beam lithography." Journal of Micro/Nanolithography, MEMS, and MOEMS 18, no. 04 (2019): 1. http://dx.doi.org/10.1117/1.jmm.18.4.043503.

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3

Demessie Yallew, Henock, Jana Jágerská, and Martin M. Greve. "Long, stitch-free slot waveguide with s-bend tapered couplers for IR-sensing applications using electron beam lithography." Journal of Vacuum Science & Technology B 41, no. 1 (2023): 012601. http://dx.doi.org/10.1116/6.0002187.

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We use the fixed beam moving stage (FBMS) electron beam lithography technique to pattern a 10 mm long slot waveguide with s-bend tapered double-tip couplers. The fabrication method solves two major limitations of the FBMS mode, namely, the requirement for fixed-width structures and the incidence of stage placement drift for patterns involving elements of different widths. This has been achieved by fracturing the outline of the structure into fixed-width elements of gradually increasing width and creating intermediate overlap areas between the elements to mitigate the stage placement drifts.

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4

Roselli, Luca, Valeria Palazzari, Federico Alimenti, Paolo Mezzanotte, Matteo Comez, and Nicola Porzi. "Robust road-to-car communications by means of an active Ku-band RF Self-IDentification (RFSID) system." International Journal of Microwave and Wireless Technologies 2, no. 2 (2010): 145–52. http://dx.doi.org/10.1017/s1759078710000243.

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This paper deals with a robust RFSID (Radio Frequency Self IDentification) system for road-to-car communications. The RFSID-based system operates in Ku-band and consists of a fixed transmitter, located at the road side, and of a receiver unit placed on the moving target, i.e. a car in its first proposed application. A slotted waveguide antenna array is used to illuminate the moving object at the desired position, whereas a four-patch array antenna is adopted at the receiver side. Both the antennas have been designed using numerical simulations based on a Finite Difference Time Domain (FDTD) al

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5

Yang, Jing, Xuhui He, Haiquan Jing, Hanfeng Wang, and Sévérin Tinmitonde. "Dynamics of Double-Beam System with Various Symmetric Boundary Conditions Traversed by a Moving Force: Analytical Analyses." Applied Sciences 9, no. 6 (2019): 1218. http://dx.doi.org/10.3390/app9061218.

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Dynamics of the double-beam system under moving loads have been paid much attention due to its wide applications in reality from the analytical point of view but the previous studies are limited to the simply supported boundary condition. In this study, to understand the vibration mechanism of the system with various boundary conditions, the double-beam system consisted of two general beams with a variety of symmetric boundary conditions (fixed-fixed, pinned-pinned, fixed-pinned, pinned-fixed and fixed-free) under the action of a moving force is studied analytically. The closed-form frequencie

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6

Chawda, Denil, and Senthil Murugan. "Dynamic Response of a Cantilevered Beam Under Combined Moving Moment, Torque and Force." International Journal of Structural Stability and Dynamics 20, no. 05 (2020): 2050065. http://dx.doi.org/10.1142/s0219455420500650.

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This paper studies the dynamic response of a cantilevered beam subjected to a moving moment and torque, and combination of them with a moving force. The moving loads are considered to traverse along the length of the beam either from fixed-to-free end or free-to-fixed end. The beam is considered to have constant material and geometric properties. The beam is modeled using the Rayleigh beam theory considering the rotary inertia effects. The Dirac-delta function used to model the moving loads in the governing partial differential equations (PDEs) has complicated the solution of the problem. The

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7

Jun, Zhang, Ming Kang Gou, and Chuan Liang. "Experimental Simulation of Bridges Subjected by Moving Loads." Applied Mechanics and Materials 873 (November 2017): 208–11. http://dx.doi.org/10.4028/www.scientific.net/amm.873.208.

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The effect of bridge vibrationinduced bylive loads such as vehicles and pedestrians is an important factor of bridge fatigue damage. It takes much labor and material resource to perform vibration experiments on bridges subjected by real moving loads in field. In order to carry out laboratory experiments on bridges subjected by moving loads, a fixed load with harmonic vibration simulates a moving load on bridge in the beam theory. A simply supported bridge is considered in the present study. The dynamic responses of bridge under different loads are established by the analytic method. Amplitude

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8

Berkani, Amirouche, and Nasser-eddine Tatar. "Stabilization of a viscoelastic Timoshenko beam fixed into a moving base." Mathematical Modelling of Natural Phenomena 14, no. 5 (2019): 501. http://dx.doi.org/10.1051/mmnp/2018057.

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In this paper, we are concerned with a cantilevered Timoshenko beam. The beam is viscoelastic and subject to a translational displacement. Consequently, the Timoshenko system is complemented by an ordinary differential equation describing the dynamic of the base to which the beam is attached to. We establish a control force capable of driving the system to the equilibrium state with a certain speed depending on the decay rate of the relaxation function.

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9

Ye, Wei, Xiao Zhen Li, Hong Duan, Chun Sheng Shan, and Xiao Han Liu. "Analytical Solution for Vertical Dynamic Response of Railway Simply Supported Beam Bridge under Bidirectional Moving Loads." Advanced Materials Research 594-597 (November 2012): 1552–56. http://dx.doi.org/10.4028/www.scientific.net/amr.594-597.1552.

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In this thesis, the dynamic responses of simply supported beam bridge in a double-line railway under bidirectional moving loads are mainly studied. To study the characteristics of Euler- Bernoulli beam, a train is simplified as a series of concentrated forces with fixed wheelbase.Structural dynamics is used to deduce the analytical expressions of vertical vibration of simply supported beam under bidirectional moving loads. By simulation software MATLAB, the numerical result of the dynamic responses of simply supported beam bridge could be obtained. Then the 48 meters simply supported beam brid

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10

Lu, Lei, Xiao-Dong Yang, Wei Zhang, and Siu-Kai Lai. "On Travelling Wave Modes of Axially Moving String and Beam." Shock and Vibration 2019 (December 12, 2019): 1–13. http://dx.doi.org/10.1155/2019/9496180.

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The traditional vibrational standing-wave modes of beams and strings show static overall contour with finite number of fixed nodes. The travelling wave modes are investigated in this study of axially moving string and beam although the solutions have been obtained in the literature. The travelling wave modes show time-varying contour instead of static contour. In the model of an axially moving string, only backward travelling wave modes are found and verified by experiments. Although there are n − 1 fixed nodes in the nth order mode, similar to the vibration of traditional static strings, the

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11

Zhang, Xian Min, and Ya Dong Wang. "Research against the Effect of Inertia Loads on Dynamic Responses of a Simply Supported Beam." Advanced Materials Research 790 (September 2013): 283–86. http://dx.doi.org/10.4028/www.scientific.net/amr.790.283.

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In order to quantitative study the loads inertia on the effect of dynamic response on a simply supported beam, a simply supported beam with a fixed section forms and different span has been calculated under two different loading modes including moving load and moving mass by numerical method by MATLAB program. The calculated results shows the exact solution of beam vibration differential equation can be calculated and a quantitative description can be made about the load inertia effects on dynamic responses of the simply supported beam. These results provide guidance to the project practice.

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12

Kong, Lingyuan, and Robert G. Parker. "Vibration of an axially moving beam wrapping on fixed pulleys." Journal of Sound and Vibration 280, no. 3-5 (2005): 1066–74. http://dx.doi.org/10.1016/j.jsv.2004.02.037.

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13

Mustafa, Aalim M., Muhammad A. Hawwa, and David E. Hardt. "Vibration of an axially moving beam supported by a slightly curved elastic foundation." Journal of Vibration and Control 24, no. 17 (2017): 4000–4009. http://dx.doi.org/10.1177/1077546317717886.

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The vibration of an axially moving beam following a slightly curved path was studied. The simply supported beam was travelling axially on a curved frictionless foundation with nonlinear elastic characteristics. The main objective of this work was to investigate the effect of the moving beam path curvature on its vibration, and the effect of different parameters on the system’s dynamic response. These parameters include axial speed, applied tension, and stiffness of the supporting foundation. A Galerkin decomposition approach with four-term truncation accuracy was used to realize a mathematical

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14

Zhang, Zhi Xin, and Zhen Dong Hu. "An Analysis of the Lateral Dynamic Response of an Axially Moving Cantilever Beam under a Moving Mass." Applied Mechanics and Materials 215-216 (November 2012): 934–40. http://dx.doi.org/10.4028/www.scientific.net/amm.215-216.934.

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From the view of flexible multibody dynamics, this paper considers not only Euler-Bernoulli beam assumption but also the effects of rotary inertia and beam’s inner tension, the equation of motion and associated boundary conditions of the dynamic model are derived by using the extended Hamilton’s principle. Converting the varying-time equation into a varying-coefficient differential equation in fixed region by substituting argument. And truncating the equation to a set of varying-time ordinary equations expressed by modal coordinates based on Assumption Modal Method and Galerkin Discrete Method

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15

Wang, Yi-Ren, Chien-Chun Hung, and Hsin Huang. "Vibration reduction of continuous moving loads on a nonlinear simple beam resting on an elastic foundation." Journal of Applied Engineering Science 20, no. 1 (2022): 53–62. http://dx.doi.org/10.5937/jaes0-30916.

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This technical note investigates a hinged-hinged nonlinear Euler-Bernoulli beam resting on an elastic foundation subjects to moving loads. The method of multiple scales (MOMS) is employed to analyze this nonlinear beam model. The fixed points plots are made to identify the system's internal resonance. The frequency ratio plot is proposed to predict the system internal resonance conditions. This study improved the author's earlier work for a wider range of prediction on internal resonance conditions. The continuous concentrated moving loads are applied to this nonlinear beam model. The dynamic

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16

Zakęś, Filip, and Paweł Śniady. "Application of Volterra Integral Equations in Dynamics of Multispan Uniform Continuous Beams Subjected to a Moving Load." Shock and Vibration 2016 (2016): 1–12. http://dx.doi.org/10.1155/2016/4070627.

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The dynamic behavior of multispan uniform continuous beam arbitrarily supported on its edges subjected to various types of moving noninertial loads is studied. Problem is solved by replacing a multispan structure with a single-span beam loaded with a given moving load and redundant forces situated in the positions of the intermediate supports. Redundant forces are obtained by solving Volterra integral equations of the first or the second order (depending on the stiffness of the intermediate supports) which are consistent deformation equations corresponding to each redundant. Solutions for the

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17

Afolabi, D. "STABILITY OF A TRANSLATING BEAM WITH FIXED AND MOVING VISCOUS DAMPING." Journal of Sound and Vibration 199, no. 4 (1997): 701–3. http://dx.doi.org/10.1006/jsvi.1995.9989.

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18

Sui, Wenwen, Zhencai Zhu, Guohua Cao, and Guoan Chen. "Dynamic behaviors of 2-DOF axially telescopic mechanism for truss structure bridge inspection vehicle." Journal of Vibroengineering 18, no. 2 (2016): 1145–56. http://dx.doi.org/10.21595/jve.2016.16436.

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Dynamic behaviors of the 2-DOF axially telescopic mechanism for truss structure bridge inspection vehicle is investigated. The telescopic mechanism is a combination of one vertical beam that can move axially, one constant beam perpendicularly fixed at the end of the vertical beam and one telescopic beam that can move along the axial direction of the constant beam during work. The Euler-Bernoulli beam theory is utilized to simplify the beams. The Lagrangian description is adopted to account for the coordinate for the telescopic mechanism. The equations of motion are derived using the Hamilton’s

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19

Gao, Hao, and Bingen Yang. "Dynamic Response of a Beam Structure Excited by Sequentially Moving Rigid Bodies." International Journal of Structural Stability and Dynamics 20, no. 08 (2020): 2050093. http://dx.doi.org/10.1142/s0219455420500935.

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A coupled dynamic system consisting of a supporting beam structure and multiple passing rigid bodies is seen in various engineering applications. The dynamic response of such a coupled system is quite different from that of the beam structure subject to moving loads or moving oscillators. The dynamic interactions between the beam and moving rigid bodies are complicated, mainly because of the time-varying number and locations of contact points between the beam and bodies. Due to lack of an efficient modeling and solution technique, previous studies on these coupled systems have been limited to

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20

Jiang, Ji-Qing. "Transient responses of Timoshenko beams subject to a moving mass." Journal of Vibration and Control 17, no. 13 (2011): 1975–82. http://dx.doi.org/10.1177/1077546310382808.

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The dynamic behavior of beam structures subject to a moving mass is a topic of practical importance in many research fields. In this study, the method of reverberation-ray matrix is presented to investigate the dynamic responses of an undamped Timoshenko beam subject to a moving mass. Based on Inglis’s assumption, the moving mass is simplified into a moving force and a concentrated mass fixed at the mid-span of the beam. Two dual local coordinates are introduced. Based on the theory of elastodynamics, the general wave solutions with two sets of unknown amplitude coefficients are derived in the

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21

Akintomide, Adeniyi, and Thomas Olubunmi Awodola. "Dynamic Response to Variable-magnitude Moving Distributed Masses of Bernoulli-Euler Beam Resting on Bi-parametric Elastic Foundation." Asian Research Journal of Mathematics 5, no. 1 (2017): 1–21. https://doi.org/10.9734/ARJOM/2017/33122.

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This work investigates the problem of dynamic response to variable-magnitude moving distributed masses of Bernoulli-Euler beam resting on bi-parametric elastic foundation. The governing equation is a fourth order partial differential equation with variable and singular co-efficients. This equation is reduced to a set of coupled second order ordinary differential equation by the method of Garlerkin. For the solutions of these equations, two cases are considered; (1) the moving force case – when the inertia is neglected and (2) the moving mass case – when the inertia term is retained. To solve

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22

Gao, Chong-yi, Guo-jun Du, Yan Feng, and Jian-xiong Li. "Nonlinear Vibration Analysis of Moving Strip with Inertial Boundary Condition." Mathematical Problems in Engineering 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/216197.

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According to the movement mechanism of strip and rollers in tandem mill, the strip between two stands was simplified to axially moving Euler beam and the rollers were simplified to the inertial component on the fixed axis rotation, namely, inertial boundary. Nonlinear vibration mechanical model of Euler beam with inertial boundary conditions was established. The transverse and longitudinal motion equations were derived based on Hamilton’s principle. Kantorovich averaging method was employed to discretize the motion equations and the inertial boundary equations, and the solutions were obtained

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23

Frahm, Ronald, Qianshun Diao, Vadim Murzin, et al. "Performance of nearly fixed offset asymmetric channel-cut crystals for X-ray monochromators." Journal of Synchrotron Radiation 26, no. 6 (2019): 1879–86. http://dx.doi.org/10.1107/s1600577519011123.

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X-ray double-crystal monochromators face a shift of the exit beam when the Bragg angle and thus the transmitted photon energy changes. This can be compensated for by moving one or both crystals accordingly. In the case of monolithic channel-cut crystals, which exhibit utmost stability, the shift of the monochromated beam is inevitable. Here we report performance tests of novel, asymmetrically cut, channel-cut crystals which reduce the beam movements by more than a factor of 20 relative to the symmetric case over the typical energy range of an EXAFS spectrum at the Cu K-edge. In addition, the p

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24

Kasture, Sachin, Nikesh V. V., Gajendra Mulay, and Achanta Venu Gopal. "Proximity error correction method for continuous moving stage electron beam writing." Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena 30, no. 5 (2012): 050602. http://dx.doi.org/10.1116/1.4746259.

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25

Choura, S. "Reduction of residual vibrations in a rotating flexible beam with a moving payload mass." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 211, no. 1 (1997): 25–34. http://dx.doi.org/10.1243/0959651971539669.

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The reduction of residual vibrations for the position control of a flexible rotating beam carrying a payload mass is investigated. The common practice used to find the position control of a flexible multi-link arm is to assign a torque actuator to each joint while the payload mass is kept fixed relative to the end-link during the time of manoeuvre. This paper examines the stability of the system if either the payload is freed accidentally to move along the beam during the time of manoeuvre or is allowed to span the beam in a desired path for control purposes. A candidate Lyapunov function is c

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26

Law, S. S., Tommy H. T. Chan, and Q. H. Zeng. "Moving Force Identification—A Frequency and Time Domains Analysis." Journal of Dynamic Systems, Measurement, and Control 121, no. 3 (1999): 394–401. http://dx.doi.org/10.1115/1.2802487.

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This paper addresses the problem of identifying a system of forces from vehicle crossing a guideway using only the vibration responses caused by the forces as the input without knowledge of the vehicle characteristics. The vehicle is modeled as a single axle and two-axle loads with fixed axle spacing moving on a simply supported beam with viscous damping. The equations of motion of the beam are obtained through modal coordinate transformation, and the resulting set of equations relating the Fourier transforms of the responses and the moving forces are converted into time domain by a new method

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27

G. Wang, Greg, Yichi Zhang, David Lamond, and Jie Ke. "Moving forward." Journal of Chinese Human Resource Management 5, no. 1 (2014): 2–13. http://dx.doi.org/10.1108/jchrm-02-2014-0011.

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Purpose – The purpose of this study is to review the current status of the Journal of Chinese Human Resource Management (JCHRM) in this initial stage and present a number of emerging unique Chinese phenomena for scholarly attention in relation to JCHRM entering its fifth year. Design/methodology/approach – Based on a review of JCHRM's status, we further reviewed literature and media reports to identify new research opportunities for indigenous Chinese human resource management (HRM) research. Findings – JCHRM has demonstrated its strength and uniqueness in contributing to management knowledge

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28

Shamrai, Yu A., N. V. Oshovskaya, and V. A. Sidorov. "Features of diagnostics of metallurgical machines with walking beam." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 80, no. 10 (2024): 64–74. https://doi.org/10.32339/0135-5910-2024-10-64-74.

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The main purpose of mechanisms with walking beams is the periodic movement of goods, which is carried out by alternately lifting vertically and moving horizontally, and at the same time contact with the load is excluded. The movement cycle includes four phases: lifting the load using movable beams, moving the load one step, lowering the load onto fixed beams, idling – moving the movable beams to their original position. In fact, it is a machine, since it includes two mechanisms (a vertical lifting mechanism and a horizontal movement mechanism) and a control device. Mechanisms with walking beam

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29

Jimoh, Ahamed, and Emmanuel Omeiza Ajoge. "Exponentially Varying Load on Rayleigh Beam Resting on Pasternak Foundation." JOURNAL OF ADVANCES IN MATHEMATICS 16 (July 1, 2019): 8449–58. http://dx.doi.org/10.24297/jam.v16i0.8219.

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This paper investigates the dynamic behavior of uniform Rayleigh beam resting on Pasternak foundation and subjected to exponentially varying magnitude moving the load. The solution techniques are based on finite Fourier sine transformed Laplace transformation and convolution theorem. The results show that for a fixed value of axial force, damping coefficient and rotatory inertia, increases in shear modulus and foundation modulus reduces the response amplitude of the dynamical system. It was also found that increases in axial force, rotary inertia, and damping coefficient for fixed values of sh

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30

Peng, Yu Xin, So Ito, Yuki Shimizu, and Wei Gao. "A Micro-Stage for Linear-Rotary Positioning." Key Engineering Materials 523-524 (November 2012): 650–55. http://dx.doi.org/10.4028/www.scientific.net/kem.523-524.650.

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In this paper, a novel Z-θZ micro-stage is designed and constructed by utilizing an impact friction drive. The stage is configured by two driving units, a moving element and a stage base. Each driving unit consists of two PZTs and a friction element. One end of each PZT is fixed on the stage base, and the other end is attached on a permanent magnet as the friction element. The moving element, which is a steel cylinder, is supported and moved by the friction element. Magnetic force generated by permanent magnet is utilized to stabilize the driving condition between the moving element and the fr

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31

Smyth, Noel F., and Bryan Tope. "Beam on beam control: Beyond the particle approximation." Journal of Nonlinear Optical Physics & Materials 25, no. 04 (2016): 1650046. http://dx.doi.org/10.1142/s0218863516500466.

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The all-optical control of the trajectory of a nonlinear optical beam propagating in a nematic liquid crystal cell is studied using a combination of modulation theory and full numerical solutions of the governing nematic equations. In detail, the output position of a signal beam is controlled via its interaction with a second, co-propagating control beam. The input positions of both the signal and control beams are fixed, with the output position of the signal beam determined by the input angle of the control beam. A simple modulation theory based on treating the optical beams as mechanical pa

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32

Du, Ai Hua, and He Qi Tang. "Research on Bearing Capacity of Column Underpinning Joint of Frame Structure Moving." Advanced Materials Research 243-249 (May 2011): 426–30. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.426.

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An experiment of sixteen frame column underpinning joints of frame structure moving was introduced, the experiment sample failure phenomena and failure type was obtained. The type was like “deep beam” failure type-“tension bar arch”, and the last failure place occurred on the interface of column and beam. Then, the underpinning joint stress mechanism and failure mode was determined based on the experiment’s conclusion. In addition, the failure course of joint was divided two stages which were before and after interface punching slip by theoretical analysis, for the stage before interface punch

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33

Hanke, U., E. C. Lovasz, M. Zichner, N. Modler, A. Comsa, and K. H. Modler. "Synthesis of PR-/RP-chain-based compliant mechanisms – design of applications exploiting fibre reinforced material characteristics." Mechanical Sciences 6, no. 2 (2015): 155–61. http://dx.doi.org/10.5194/ms-6-155-2015.

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Abstract. Compliant mechanisms have several advantages, especially their smaller number of elements and therefore less movable joints. The flexural members furthermore allow an integration of special functions like balancing or locking. Synthesis methods based on the rigid body model (Howell, 2001; Sönmezv, 2008) or topology optimisation (Zhou and Mandala, 2012) provide practical applications from the advantages of compliant elements. Beside these methods, a much simpler approach is the geometric-based synthesis (Ehlig et al., 2013) which is focused on solving guidance tasks by using RR-chain1

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34

Dyniewicz, Bartłomiej, and Czesław Bajer. "The Gao beam under a moving inertial load and harmonic compression." MATEC Web of Conferences 285 (2019): 00003. http://dx.doi.org/10.1051/matecconf/201928500003.

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In the present work the dynamics of the system of a mass moving on the beam is investigated in detail numerically in the case of vibrations about a buckled state. The differential equation that describes the motion is strongly nonlinear. Simulations are based on the space-time finite element method. It enabled us easily determine the influence of the moving inertial particle. At the computational stage it becomes a real problem when the mass particle traverses joints of neighbouring elements. The results of representative and interesting computer simulations are enclosed.

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35

Kudryavtsev, Evgeny Mikhailovich, Alexandr Valerievich Gavrilenko, and Mostafa Jafari. "Digital simulation of load-bearing structures with movable cargo carts." E3S Web of Conferences 535 (2024): 04001. http://dx.doi.org/10.1051/e3sconf/202453504001.

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The process of digital simulation of the design parameters of load-bearing structures when moving a cargo cart on them is developed on the example of a load-bearing beam of a crane (bridge. gantry, ...). This process includes three main stages. The first stage is the creation of appropriate mathematical multiparametric equations for automated simulation of: the values of reactions in the supports of the crane load-bearing beam; bending moments; transverse forces; displacements; beam deflection angles and maximum stresses at different positions of the cargo cart on the crane beam. The second st

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36

Wolszczak, Piotr, Grzegorz Litak, and Krystian Lygas. "Analysis of dynamics of a vertical cantilever in rotary coupling to the moving frame with movement limiters." MATEC Web of Conferences 241 (2018): 01021. http://dx.doi.org/10.1051/matecconf/201824101021.

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The efficiency of the mechanical energy harvesting with the use of vibrating elements can be improved by synchronizing stimulation vibrations and own linear frequencies of systems as well as super or sub harmonics induced by non-linear phenomena. The article presents numerical cross-sectional study of the mechanical system. The system consists of an elastic beam set vertically, which the lower end is fixed in the rotary support, and is stimulated to move in the horizontal axis. The upper end of the beam is free but below its level there are bumpers limiting the free rotation of the beam. Numer

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37

HU, WEIPENG, ZICHEN DENG, and HUAJIANG OUYANG. "GENERALIZED MULTI-SYMPLECTIC METHOD FOR DYNAMIC RESPONSES OF CONTINUOUS BEAM UNDER MOVING LOAD." International Journal of Applied Mechanics 05, no. 03 (2013): 1350033. http://dx.doi.org/10.1142/s1758825113500336.

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Based on the multi-symplectic idea, a generalized multi-symplectic integrator method is presented to analyze the dynamic response of multi-span continuous beams with small damping coefficient. Focusing on the local conservation properties, the generalized multi-symplectic formulations are introduced and a fifteen-point implicit structure-preserving scheme is constructed to solve the first-order partial differential equations derived from the dynamic equation governing the dynamic behavior of continuous beams under moving load. From the results of the numerical experiments, it can be concluded

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38

Tran, Ngoc Thoai, and Thanh-Phong Dao. "Statics Analysis and Optimization Design for a Fixed-Guided Beam Flexure." Journal of Advanced Engineering and Computation 4, no. 2 (2020): 125. http://dx.doi.org/10.25073/jaec.202042.276.

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The ratchet mechanism has been used to ensure moving in one direction of rotation, i.e. either clockwise or counterclockwise. This mechanism is designed based on fixed-guided beam flexures to reduce friction and improves accuracy compared to the traditional mechanism. This paper presents a static analysis and parameter optimization for the fixed-guided beam flexures via using the pseudo-rigid-body model and a fmincon algorithm. The Finite Element Method (FEM) of the fixed-guided beam also has been used to verify the maximum stress and the x-direction displacement. Modified pseudorigid-body mod

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39

Nguyen, Quoc Chi, Nguyen Tri Giang Vu, and Phuong Tung Pham. "Input shaping control of a flexible cantilever beam excited by a moving hub." Science & Technology Development Journal - Engineering and Technology 3, no. 2 (2020): First. http://dx.doi.org/10.32508/stdjet.v3i2.605.

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Introduction: A cantilever beam is a well-known structural element in engineering, which is only fixed at one end. This structure can be used to describe a manipulator, whose stiffness is large to ensure rigidity and stability of the system. A flexible cantilever beam provides a light-weight structure and high cost efficiency but generates vibration under high-speed positioning. In this paper, we aim to control the vibratory behavior of a flexible cantilever beam attached to a moving hub. Method: The mathematical model of the flexible beam is described by partial differential equations (PDEs)

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Mamandi, Ahmad, and Mohammad H. Kargarnovin. "Nonlinear Dynamic Analysis of a Timoshenko Beam Resting on a Viscoelastic Foundation and Traveled by a Moving Mass." Shock and Vibration 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/242090.

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The dynamic response of a Timoshenko beam with immovable ends resting on a nonlinear viscoelastic foundation and subjected to motion of a traveling mass moving with a constant velocity is studied. Primarily, the beam’s nonlinear governing coupled PDEs of motion for the lateral and longitudinal displacements as well as the beam’s cross-sectional rotation are derived using Hamilton’s principle. On deriving these nonlinear coupled PDEs the stretching effect of the beam’s neutral axis due to the beam’s fixed end conditions in conjunction with the von-Karman strain-displacement relations is conside

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Wang, Yan, Xiu Li Liu, and You Sheng Yu. "The Mechanical Behavior Study on Reduced Beam Section and Widened Beam Section Connections of Steel Frames." Advanced Materials Research 163-167 (December 2010): 717–25. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.717.

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In the paper, finite element models are established by using numerical methods to study the mechanical behavior of these kinds of connections. By discussing the range of design parameter of reduced beam section connection and widened beam section connection, stress distribution of connections and the influence of design parameter on bearing capacity at elastic stage and plastic stage are studied. The FEM models of these two kinds of connections behaved good ductility behavior. The purpose of moving plastic hinge outward from the beam and column interface is realized. Stress concentration near

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Wang, Yuanbin, Zhimei Lou, Kai Huang, and Xiaowu Zhu. "Size-Dependent Free Vibration of Axially Moving Nanobeams Using Eringen’s Two-Phase Integral Model." Applied Sciences 8, no. 12 (2018): 2552. http://dx.doi.org/10.3390/app8122552.

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In this paper, vibration of axially moving nanobeams is studied using Eringen’s two-phase nonlocal integral model. Geometric nonlinearity is taken into account for the integral model for the first time. Equations of motion for the beam with simply supported and fixed–fixed boundary conditions are obtained by Hamilton’s Principle, which turns out to be nonlinear integro-differential equations. For the free vibration of the nanobeam, the critical velocity and the natural frequencies are obtained numerically. Furthermore, the effects of parameters on critical velocity and natural frequency are an

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Abbas, Ammar N., and Muhammad Asad Irshad. "Parallel P-PD controller to achieve vibration and position control of a flexible beam." IAES International Journal of Robotics and Automation (IJRA) 10, no. 2 (2021): 149. http://dx.doi.org/10.11591/ijra.v10i2.pp149-160.

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Robotic arms are considered as a cantilever beam fixed at one end and due to the length-to-weight ratio, it has a significant vibration-induced that needs to be controlled to achieve accurate position, speed control and to increase its efficiency. In this project, a discretized Timoshenko beam model is used to discuss the dynamics of the system. Further, to implement the control on the hardware an experimental setup is fabricated to observe the open-loop and closed-loop responses of the beam made of low-density polyethylene. An accelerometer as a feedback sensor is attached at one end of the f

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Ammar, N. Abbas, and Asad Irshad Muhammad. "Parallel P-PD controller to achieve vibration and position control of a flexible beam." IAES International Journal of Robotics and Automation (IJRA) 10, no. 2 (2021): 10.11591/ijra.v10i2.pp149–160. https://doi.org/10.11591/ijra.v10i2.pp149-160.

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Robotic arms are considered as a cantilever beam fixed at one end and due to the length-to-weight ratio, it has a significant vibration-induced that needs to be controlled to achieve accurate position, speed control and to increase its efficiency. In this project, a discretized Timoshenko beam model is used to discuss the dynamics of the system. Further, to implement the control on the hardware an experimental setup is fabricated to observe the open-loop and closed-loop responses of the beam made of low-density polyethylene. An accelerometer as a feedback sensor is attached at one end of the f

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Lou, P., G.-L. Dai, and Q.-Y. Zeng. "Modal Coordinate Formulation for a Simply Supported Bridge Subjected to a Moving Train Modelled as Two-Stage Suspension Vehicles." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 219, no. 10 (2005): 1027–40. http://dx.doi.org/10.1243/095440605x31940.

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Modal coordinate formulation for analysing the dynamic interaction between a moving train and a simply supported bridge is presented in this article. The train is composed of a series of identical vehicles, and each vehicle is modelled as a four-wheelset mass-spring-damper multi-rigid body system with two-stage suspension having ten degrees of freedom (DOFs). A simply supported bridge, together with the track, is modelled as a Bernoulli-Euler beam. The deflection of the beam is described by superimposing modes. The train and the beam are regarded as an entire dynamic system, and then the modal

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Noda, Koji. "Development of heavy-ion radiotherapy technology with HIMAC." International Journal of Modern Physics: Conference Series 44 (January 2016): 1660219. http://dx.doi.org/10.1142/s2010194516602192.

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Since 1994, HIMAC has carried out clinical studies and treatments for more than 9000 cancer patients with carbon-ion beams. During the first decade of the HIMAC study, a single beam-wobbling method, adopted as the HIMAC beam-delivery technique, was improved for treatments of moving tumors and for obtaining more conformal dose distribution. During the second decade, a pencil-beam 3D scanning method has been developed toward an “adaptive cancer treatment” for treatments of both static and moving tumors. A new treatment research facility was constructed with HIMAC in order to verify the developed

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Kordestani, Hadi, Chunwei Zhang, and Mahdi Shadabfar. "Beam Damage Detection Under a Moving Load Using Random Decrement Technique and Savitzky–Golay Filter." Sensors 20, no. 1 (2019): 243. http://dx.doi.org/10.3390/s20010243.

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In this paper, a two-stage time-domain output-only damage detection method is proposed with a new energy-based damage index. In the first stage, the random decrement technique (RDT) is employed to calculate the random decrement signatures (RDSs) from the acceleration responses of a simply supported beam subjected to a moving load. The RDSs are then filtered using the Savitzky–Golay filter (SGF) in the second stage. Next, the filtered RDSs are processed by the proposed energy-based damage index to locate and quantify the intensity of the possible damage. Finally, by fitting a Gaussian curve to

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Takamasu, Kiyoshi. "Measurement System for Multiple Degrees of Freedom Moving Robot." Journal of Robotics and Mechatronics 5, no. 5 (1993): 453–56. http://dx.doi.org/10.20965/jrm.1993.p0453.

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The multiple degrees of freedom (multi-DOF) moving robot and its measurement system have been developed realize a positioning system with high flexibility. The multi-DOF robot is driven by six piezo-electric devices; and it moves in two modes, an absolute motion mode and a relative motion mode. In the absolute motion mode, it walks on a surface plate by a two-dimensional inchworm method having 3-DOF, in X and Y directions and a rotation. After a frame body is fixed, a center table can be positioned on 6-DOF. For measuring its position, the novel position measurement system has been developed.

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Abbas, W., Omar K. bakr, M. M. Nassar, Mostafa A. M. Abdeen, and M. Shabrawy. "Analysis of Tapered Timoshenko and Euler–Bernoulli Beams on an Elastic Foundation with Moving Loads." Journal of Mathematics 2021 (April 19, 2021): 1–13. http://dx.doi.org/10.1155/2021/6616707.

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This research studies the vibration analysis of Euler–Bernoulli and Timoshenko beams utilizing the differential quadrature method (DQM) which has wide applications in the field of basic vibration of different components, for example, pillars, plates, round and hollow shells, and tanks. The free vibration of uniform and nonuniform beams laying on elastic Pasternak foundation will be studied under three sets of boundary conditions, that is, mixing between being simply upheld and fixed while utilizing the DQM. The natural frequencies and deflection values were produced through the examination of

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Chen, Hua Wei, and Ichiro Hagiwara. "Novel Precision PZT-Driven Micropositioning Stage with Large Travel Range." Key Engineering Materials 407-408 (February 2009): 159–62. http://dx.doi.org/10.4028/www.scientific.net/kem.407-408.159.

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One novel long-travel piezoelectric-driven linear micropositioning stage capable of moving in a stepping mode is developed. The stick-slip friction effect between flexure hinge actuation tips with a sliding stage is used to drive the stage step-by-step through an enlarged displacement of piezoelectric actuator. In order to enlarge the travel range, magnifying mechanism is optimally designed by use of flexure hinge and lever beam. Moreover, dynamic model of such stage is proposed by consideration of reset integrator stick-slip model. The simulation results show that the stage has considerable g

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