大容量UPS电源车厢体骨架改进前后强度对比分析

Comparative Analysis of the Strength of the Frame Structure of the Large-Capacity UPS Power Supply Carriage

大容量UPS电源车在首次设计制作中,发生骨架强度不够、厢体变形的情况,在对厢体骨架进行加固后,厢体再未发现变形情况,针对此次厢体变形整改情况建立加强前和加强后厢体骨架模型,运用ANSYS Workbench对厢体骨架进行预应力模态分析,通过分析有限元仿真结果,对比厢体骨架在方案改进前后的应力和应变,得出厢体改进的可行性。自电源车交付以来,已经稳定运行三年,行驶近两万公里,整体行驶性能稳定可靠。

In the first design and production of the large-capacity UPS power supply vehicle,the frame strength was insufficient and the car body was deformed.After the car body frame was strengthened,no deformation was found in the whole car body.And strengthen the rear car body skeleton model,use ANSYS Workbench to carry out pre-stressed modal analysis on the car body skeleton,and obtain the larger deformation parts of the car body structure and the weak links of the load deformation by analyzing the finite element simulation results,and address the above problems A comparative analysis was carried out to compare the stress and strain of the car body frame after the plan was improved.The results showed that the maximum stress value of the car body frame was reduced from 204.33 MPa before the plan improvement to 157.67 MPa,and the maximum strain value was 1.4968 mm before the plan improvement.Reduced to 0.70442 mm, it has been running steadily for three years since the delivery of the power supply car,driving nearly 20,000 kilometers,and the overall car body has not been deformed by the deadline,and the overall driving performance is stable and reliable.