载荷分配机构冲击载荷分配特性分析及试验研究

摘要

采用显式动力学方法实现对冲击载荷作用下载荷分配机构的响应特性分析,并通过大型试验对仿真结果进行验证.研究表明:获得的结果和理论及试验结果吻合较好,具有一定的参考价值;载荷分配机构动冲击载荷响应与静载响应基本一致;由于机构整体的震动,各支撑点载荷在上升阶段存在微小波动特性;机构与下部支撑弧托间摩擦因数 u 是影响载荷分配结果的主要因素之一,后续可以通过降低摩擦系数 u 改善载荷分配比例,为同类型载荷分配机构的设计、分析及试验提供了参考.%This paper analyses the response of the load distribution mechanism under the action of impact load by explicit dynamic FEM. Experiment is taken to validate the result of FEM simulation. Research shows that: result of FEM has good agreement with the test results and has good credibility. The response of impact load of load distribution mechanism is the same as the response of static load. As a result of structure overall vibration, the load of each support leg has slight fluctuations in the rising stage. The friction coefficient u is one of the main influence factors of load distribution result. By reducing friction coefficient u, load distribution can be improved. This article provides reference of design and analysis for load distribution mechanism.