摘要
伸缩臂的瞬态动力学分析对伸缩臂的设计和使用具有重要的指导意义。基于Rayleigh-Ritz分析法对高空作业车的伸缩臂进行瞬态动力学分析。通过定义Rayleigh阻尼系数和模态分析获得所需的频率范围,然后计算出Rayleigh阻尼系数。分别在三个工况下完成了伸缩臂的瞬态动力学分析,获得了结构Von Mises等效应力随时间变化的曲线以及伸缩臂头部位移随时间振动情况的曲线。并探讨了不同频率范围下Rayleigh阻尼系数和阻尼比对结构振动的影响,为伸缩臂的瞬态动力学分析研究提供参考。
The transient dynamics analysis of telescopic boom has an important guiding significance to the design and use.Based on the Rayleigh Ritz method analyzes the transient dynamics of the telescopic boom of aerial work platform truck.By defining the Rayleigh damping coefficient and modal analysis obtains the required range of frequencies,and then calculates the Rayleigh damping coefficient.Respectively under three conditions to complete transient dynamics analysis of telescopic boom,obtains the Von Mises equivalent stress changing with time and telescopic boom head displacement of vibration changing with time.Discusses the influence of the Rayleigh damping coefficient and damping ratio under different frequencies on the structure vibration,to provide the reference for the transient dynamics analysis of telescopic boom.
出处
《机械设计与制造》
北大核心
2015年第1期184-186,190,共4页
Machinery Design & Manufacture
基金
四川省科技支撑项目(2014HH0022)
关键词
伸缩臂
瞬态动力学分析
阻尼系数
阻尼比
Telescopic Boom
Transient Dynamics Analysis
Damping Coefficient
Damping Ratio
