SKMB-200型转向架构架强度与结构优化仿真分析

以应用于CRH380A型动车组上的SKMB-200型动力转向架构架为研究对象,基于UIC615-4标准计算4种模拟运营工况载荷及一种超常载荷,继而确定仿真分析所需的边界条件.静强度仿真结果表明:模拟运营工况下,构架的最大应力分别为225.7、209.0、250.3和196.2 MPa,超常载荷工况下构架的最大应力为30...

Simulation analysis on strength and structure optimization of SKMB-200 bogie frame

By taking SKMB-200 power bogie frame applied to CRH380 A EMU as the research object, and based on UIC615-4 standard, four kinds of simulated operation load and one kind of abnormal load are calculated, and then the boundary conditions for simulation analysis are determined. The static strength simulation results show that the maximum stresses of the frame are 225.7, 209.0, 250.3 and 196.2 MPa respectively under the simulated operation conditions, and 307.6 MPa under the abnormal load condition, which is less than the allowable stress of the main material of the frame, SMA490 BW type weathering steel. The thickness of the upper and lower cover plates and the inner and outer side plates of the side beams are set as the design variables, the maximum equivalent stress as the constraint conditions, and the minimum mass of the frame as the objective function. The optimization results show that the total mass of the frame after optimization is reduced by 109 kg, 6.8% lower than that before optimization, and the maximum equivalent stress of the frame is 329.98 MPa, which meets the strength requirements. By optimizing the structural parameters of the frame, the un-sprung mass of SKMB-200 bogie can be effectively reduced, and then its dynamic performance can be improved, which can provide some reference for the structural optimization of EMU bogie.