摘 要：针对某商用车转向管柱支架在整车试验出现断裂的问题，采用有限元法对其进行仿真复现。发现造成转向管柱支架断裂的原因是转向管柱下护管内外套筒间连接螺栓松动，导致过大变形、过大应力。然后基于仿真结果提出了改进措施，并通过了试验验证。
关键词：商用车；转向管柱支架；断裂；螺栓松动
中图分类号：U463.4 文献标志码：A DOI：10.15917/j.cnki.1006-3331.2025.01.012
Analysis of Fracture Problem for Steering Column Support of a Commercial Vehicle
XU Shifeng,SUN Chenglong,GAO Jinhong
Abstract: Aiming at the fracture problem for steering column support of a commercial vehicle in the vehicle test, the authors use the finite element method to simulate and reproduce it and find the cause of the fracture is that the loose connection of bolts between the inner and outer sleeve of the lower guard pipe leads to excessive deformation and stress.Then, they put forward the improvement measures based on the simulation results, which are verified by the test.
Key words: commercial vehicle; steering column support; fracture; bolt looseness
