门式起重机结构参数与动态指标耦合关系

The Coupling Relation Between Structural Parameters and Dynamic Indexes of Gantry Crane

根据已建立的小车架为弹性结构时门式起重机的3质量3自由度串联弹性动力学系统振动模型,通过模态分析法获得系统动态特性的数值解,着重研究门式起重机结构参数与动态指标之间的耦合关系和变化规律。小车轨距对系统固有频率的影响较大;桥架刚度系数和小车架刚度系数对系统动载系数的影响不大。

According to the characteristics of the existing serial elastic dynamic vibration model of three masses and three degrees of freedom for a gantry crane with elastic trolley frame, the numerical solutions to the dynamic behaviors of the system are obtained through modal analysis. The coupling relationship and variation law between the structural parameters and dynamic indexes of the gantry crane is emphatically studied. It reveals that the rail gauge of the trolley has a big effect on the natural frequency of the system; however, the stiffness coefficients of the girder and the trolley frame have little effects on the dynamic factor of the system.