Steady-state response of axially moving viscoelastic beams with pulsating speed: comparison of two nonlinear models |
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| Institution: | 1. Department of Engineering Mechanics, Shanghai Jiao Tong University, Shanghai 200030, China;2. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai 200072, China;1. The University of Sheffield, Department of Computer Science, Regent Court, 211 Portobello, Sheffield S1 4DP, United Kingdom;2. Institute of High Performance Computing, 1 Fusionopolis Way, 16-16 Connexis North, 138632, Singapore;1. Univ Lyon, ENTPE, LTDS UMR CNRS 5513, Rue Maurice Audin, F-69518, Vaulx-en-Velin Cedex, France;2. CEREMA - Direction territoriale Sud-Ouest, Département Laboratoire de Bordeaux, 24 rue carton - CS 41635, Bordeaux Cedex 33073, France |
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| Abstract: | Principal parametric resonance in transverse vibration is investigated for viscoelastic beams moving with axial pulsating speed. A nonlinear partial-differential equation governing the transverse vibration is derived from the dynamical, constitutive, and geometrical relations. Under certain assumption, the partial-differential reduces to an integro-partial-differential equation for transverse vibration of axially accelerating viscoelastic nonlinear beams. The method of multiple scales is applied to two equations to calculate the steady-state response. Closed form solutions for the amplitude of the vibration are derived from the solvability condition of eliminating secular terms. The stability of straight equilibrium and nontrivial steady-state response are analyzed by use of the Lyapunov linearized stability theory. Numerical examples are presented to highlight the effects of speed pulsation, viscoelascity, and nonlinearity and to compare results obtained from two equations. |
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