Load sharing of multi braced structure of high speed railway wreck crane based on AMESim ADAMS coupling simulation
                                      LIU Yong1, LIU Xiao xiao2, ZHANG Lei lei2, ZHAO Yan zhi2, YU Yue1, YU Yue bin3
(1.Dalian r&d center of CRRC Qiqihar Vehicle Limited Corporation, Dalian 116052, China; 2.College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China;3.CRRC Qiqihar Vehicle Limited Corporation, Qiqihar 161002, China)

Abstract: Aiming at the problem of ordinary railway wreck crane without the capacity of rescue on the high speed railway because of the heavy load of single leg and the poor load sharing performance, a multi braced structure of wreck crane  having 4 more legs than usual crane  for high speed railway was proposed. Considering its special structure, two active control strategy limiting the maximum pressure of all legs and of legs on one side are designed. Multi body dynamic models built in ADAMS, hydraulic models and control system models built in AMESim of the multi braced system cooperate on hydraulic mechanical coupling simulation. The impact of two active control strategy on dynamic characteristics of the hydraulic system of the multi braced structure are analyzed and compared under the simulative working condition of Wreck Crane. The results of simulation show that the control strategy limiting all legs  maximum pressure is feasible and direct the optimization design of multi braced structure.

Key words: railway crane; multi braced structure; hydraulic mechanical coupling simulation; load sharing