| Compared with the traditional railway cranes,the bridge space that high-speed railway rescue crane work on is narrow,the way that the leg open up is limited.And when the crane working on the viaduct,the leg force situation are differernt of working on the ground,may exist the situation that the lifting torque is too large and lead to the damage of the bridge.In order to solve this problem,this paper proposing a typical eight-leg high-speed railway crane,establishing the load calculation model,carrying on the dynamic simulation solution,and extends the calculation method to the application,finally further discusses the influence of leg stiffness on load uniformity.The main research contents are as follows:(1)Aiming at a eight-leg high-speed rescue crane model and its working load,established the mechanics calculation model of load.Using the diagrammatic multiplication method of the structural mechanics inferring the solving equations of th force of each leg.Using the Matlab write the calculation program,and obtaining the graph of the force of eight-leg high-speed railway crane’s leg.(2)The three-dimensional software is used to establish the model of the high-iron rescue crane,and the model is simulated based on ANSYS software and ADAMS software.The simulation results show that the theoretical model is correct.(3)On this basis,the structure and working conditions of the high-speed rail rescue crane are further expanded in order to make the theoretical modeling solution method more generalized and generalized.The calculation of the leg load in two typical cases is selected and analyzed,and the results are obtained.(4)The dimension of the stiffness of the crane is measured,and the concept of the relative stiffness coefficient is put forward.The influence of the stiffness variation of the inner and outer leg on the load is discussed.Finally,obtain the best ratio of the stiffness of the inner and outer leg when the load is uniform. |
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