客车后排3人椅试验仿真与钩件尺寸优化

为了降低座椅钩件的材料成本,采用Hyperworks软件建立某款客车后排3人座椅的有限元模型.基于GB 14167-2013《汽车安全带安装固定点、ISOFIX 固定点及上固定点系统》进行座椅安全带固定点试验与仿真,对比分析上、中、下3条绳索最大位移量,验证仿真模型有效.在仿真模型基础上,针对座椅后脚钩件提出3组优化方案,选取最优方案,利用Optistruct模块对最优方案钩件进行尺寸优化.结果表明:在满足安全带固定点试验法规的前提下,座椅钩件厚度从10 mm减至2.5 mm;采用Q235材料代替原SAPH590材料,可以降低座椅钩件成本.

Simulation Analysis on Rear Three-Occupant Seats for Bus Coach and Hook Size Optimization

In order to reduce material cost of seat hooks, a finite element model of rear three-occupant seats for bus and coach was established by using Hyperworks software. According to GB 14167-2013 standard, experiments and simulations of the seatbelt anchorages were carried out to compare the maximum displacement of upper, middle, and lower ropes. Based on the above models, three groups of optimization schemes for seat hook design were proposed. With the best scheme the hook size was optimized using Optistruct. The analysis results showed that, when Q235 steel was used to replace the original SAPH590 steel, thickness of the seat hook can be reduced from 10 mm to 2.5 mm, and the material cost of seat hook can be consequently reduced, without the comprise of safety of seatbelt anchorages.