桥式起重机在工作过程中箱形梁的载荷分布(应力分布 ) ,通常用实测方法获得。但实测只能在某些机型某种工况下进行 ,工作量很大。要想获得多台机型多种工况下箱形梁的载荷实测值是很难实现的。采用计算机仿真方法 ,考虑起重量、起升高度及小车位置等因素的随机性 ,通过建立弹性 The load distribution (stress distribution) of the box girder during the operation of the bridge crane is usually obtained by the actual measurement method. However, the actual measurement can only be carried out under certain operating conditions of certain models and the workload is heavy. In order to obtain multiple models under a variety of conditions box girder load measured value is difficult to achieve. Using computer simulation method, taking into account the weight, lifting height and car position and other factors of randomness, through the establishment of flexibility