【摘要】 应用有限单元法及MSC.MARC有限元分析程序,从实验工况和设计工况两方面分析了已使用多年的120 t/30 t/10 t×27.6 m桥式起重机主梁桥架变形及应力分布状态,该起重机的最大挠度、VONM ISES等效应力、主梁的第一阶固有频率均符合设计规范,为延长其使用寿命提供了理论依据。更多还原

【Abstract】 With finite element method and MSC.MARC finite element analysis program,and based on the experimental operating mode and design operating mode,this article has analyzed the distortion of the bridge main girder and the stress distribution of the used 120t/30t/10t×27.6m bridge crane,which proves that the max.flexibility of this crane,VON MINSES equivalent stress and the natural frequency of the first step of the main girder are in conformity to the design specification,in this case the theoretical basis for the extension of the service life has been provided.更多还原