考虑起重机的动态特性,利用有限元分析软件ANSYS对门式起重机蒙皮式结构系统进行模态分析,确定影响结构动态性能的关键模态频率,并对门式起重机蒙皮式结构冲击振动进行瞬态动力学分析。用ANSYS软件仿真分析门式起重机蒙皮式结构系统起升的运动过程,得到门式起重机在起升过程中受到冲击载荷作用时主梁跨中垂直方向位移随时间变化的响应规律,并提取出最大动位移,从而计算出动载系数,为门式起重机蒙皮式结构的设计提供理论依据。 Considering the dynamic characteristics of cranes, the finite element analysis software ANSYS was used to analyze the modalities of the derrick-type structural system of gantry cranes to determine the critical modal frequencies that affect the dynamic performance of the gantry cranes and to transiently impact the impact vibration of the derrick structure of the gantry cranes Analysis. ANSYS software was used to simulate and analyze the lifting process of the gantry crane skin-lifting system, and the response of the gantry crane to the vertical displacement in the mid-span of the gantry crane subjected to the impact load during lifting was obtained. The maximum dynamic displacement, and thus calculate the dynamic load coefficient for the portal crane skin structure design provides a theoretical basis.