摘要
根据某履带式急救车两级减振系统功能及物理特性,对减振系统进行合理简化。采用非线性等效力学模型近似描述减振系统,利用汽车试验场道路试验数据,借助动力学仿真软件ADAMS辨识非线性力学模型物理参数;通过ADAMS优化计算功能对减振系统非线性力学模型进行优化分析,获得优化后力学模型,并在ADAMS/View中对优化后力学模型冲击减振效果进行了简化计算和对比研究。分析结果表明,优化后力学模型极大地提高了系统的减振效率,尤其是低频部分减振效率,增加了系统的稳定性。并给出了优化后力学模型力-位移滞回曲线,供减振器改进时参考。
According to the function and physical properties of tracked ambulance two-grade damping system,the model for the damping system was reasonably simplified.The damping system was described by a nonlinear equivalent mechanical model.Using the test data of proving ground,data fitting of nonlinear equivalent mechanical model’s equivalent parameters was conducted by dynamics simulation software ADAMS;The optimization analysis was carried out through optimization calculation of ADAMS and a model after optimization was got.The shock absorbing property of the model after optimization was simply computed and compared in ADAMS/View.As seen from the analysis results,the new model greatly improved the system’s vibration reduction effectiveness,especially the vibration reduction effectiveness in low frequency,and enhanced the system stabilization.To improve shock absorber,the force-displacement hysteresis curve was given out.
出处
《机械设计与制造》
北大核心
2013年第4期42-46,共5页
Machinery Design & Manufacture
关键词
减振系统
参数辨识
非线性模型
减振效率
优化分析
Damping System
Parameter Identification
Nonliner Model
Vibration Reduction Effectiveness
Optimization Analysis
