Mechanical solution of the multi braced structure of wreck crane for high speed railway
                        LIU Yong1, LI Yang2, ZHANG Lei lei2, ZHAO Yan zhi2, LIU Kang rong3, WANG Yuan ming4, YU Yue bin5
(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.Wuhan Railways Bureau Engine Office, Wuhan 430071, China;4.Qinhuangdao Tobacco Machinery Co., Ltd., Qinhuangdao 066004, China;5.CRRC Qiqihaer Vehicle Limited Corporation, Qiqihaer 161002, China)

Abstract: In order to lighten the load of single leg and improve the load sharing performance of the ordinary railway wreck crane without the capacity of rescue on the high speed railway, multi braced structure of wreck crane  having 4 more legs than usual crane and bearing the load by the wheel and rail for high speed railway was proposed. Firstly, the analytical model of the reaction forces of outriggers was established based on the principle of solving indeterminate structure with high degrees. Then, the analytical model was calculated by the software of Matlab under the two working conditions of the crane boom turning 360 degrees with two different load. At last, the rigid flexible coupling simulation for multi braced structure was computed by the cooperation of software ANSYS and ADAMS under the same working conditions. The simulation result and the calculation result are basically coincident. The research result show that the analytical model can direct the optimization design of multi braced structure.

Key words: railway crane; multi braced structure; the reaction forces of outriggers; indeterminate structure with high degrees