Abstract:

Based on the HHT(Hilber-Hughes-Taylor) implicit time integration method, a nonlinear dynamics analysis model of a crane with a friction effect was built, and the nonlinear time-variation dynamic characteristics of box-type boom were studied. The effects of friction between the boom and sliders, the elastic stiffness and damping characteristics of the telescopic oil cylinder, and the stiffness of the crane boom on vibration of telescopic crane boom were analyzed. In view of some problems about vibration of telescopic crane boom, the effective improvement measures were proposed.

Key words: telescopic boom, time-variation dynamic characteristics, frictional vibration, implicit time integration

摘要：

基于HHT（Hilber-Hughes-Taylor）隐式时间积分法，建立了考虑摩擦影响的起重机带载伸缩臂架非线性动力学分析模型，研究了臂架伸缩过程中的非线性时变动力特性。分析了臂架-滑块间摩擦特性、伸缩油缸的弹性刚度及阻尼特性、臂架自身刚度等对带载伸缩臂架振动的影响。针对起重机臂架带载伸缩过程中存在的抖振问题，提出了有效的解决措施。

关键词: 伸缩臂架, 时变动力特性, 摩擦振动, 隐式积分法