Dynamic Response Optimization of a Nonlinear Motorcycle Structure under the Action of Engine Loads and a Half-Sine Bump Road

Yang-Tai Lin ； Te-Chang Sun

《中華民國振動與噪音工程學會論文集》 1993 (1993/06) Pp. 187-196

https://doi.org/10.30028/CSSVANNUAL.199306.0187

摘要

本文將最近所提出非線性結構動態反應之最佳化方法應用於機車結構體之減振。所考慮之振源可同時來自於引擎內不平衡之慣性力及半正弦凸起路障。而在最佳化時，以座墊處之最大加速度暫態反應為目標函數，設計變數則為懸吊系統及座墊之動態參數。為求能真實模擬機車實體，而採用全比例之有限元素模型來進行最佳化，並比較其具有線性與材料非線性反應的最佳設計其間的差異。

並列摘要

A recently proposed procedure for dynamic response optimization of nonlinear structural systems is applied to the problem of decreasing the vibration of a motorcycle structure. The source of the vibration is simultaneously coming from the unbalance inertia force of the engine and a half-sine bump on the road. The maximum acceleration of nonlinear transient response at the seat is taken as the objective function during the optimization simulation. The stiffness and damping parameters of the suspension system and the seat are considered as design variables. A full-scale finite element model for the motorcycle structure with elasto-damping elements of nonlinear material models is presented. Comparison of the optimum designs with linear and material nonlinear response are obtained and discussed.

並列關鍵字

Dynamic response optimization ； Nonlinear structural system ； Objective function ； Suspension system ； Design variable ； Finite element model ； Material nonlinear