某军用越野车A柱结构改进与优化设计

The Structure Improvement and Optimization Design for A-pillar's Cracking in Some Military Off-road Vehicle

针对车辆实际运行工况,根据分析结果,优化车辆A柱上部与侧顶梁、前顶横梁节点,以及A柱下部与前门铰链加强板、前风挡下横梁节点截面。采用修改前门框外板型面过渡圆角,调整焊点布置,增加塑料加强件、加强板,腔体注入双组份环氧增强胶等措施,提高开裂区域强度,最终解决扭转工况下的疲劳开裂。

According to the actual operating conditions of vehicle, and the results of the analysis, optimization structure section design for point to A-pillar, side beam, and front roof cross member, point to A-pillar, front door hinge reinforcing plate, and bottom end rail for front windshield. Changing the R value of outside the front door frame and adjusting layout the welding, adding plastic reinforcement, reinforcing plate, injecting two component structural foam for Increasing stiffness, strength, fatigue can avoid the fatigue crack in torsional condition.