Abstract

The newly revised GB 13057-2014 ‘The strength of the seats and their anchorages of passenger vehicles’ replaces the static test with a dynamic test, which puts forward higher requirements on seat safety. Considering safety and lightweight design, the LFT (Long glass Fiber reinforced Thermoplastic) is used to replace the original steel seat back frame. Combined with energy absorption model and topology optimisation, the force transmission path and detail structure design under both the forward loading and rearward loading conditions are carried out. In order to analyse the occupant protection performance, numerical models of composite seat and HybridIII dummy are established, and the safety and lightweight effect of LFT seat back frame are optimised and verified.

摘要

新修订的GB 13057-2014《乘用车座椅及其锚固装置的强度》将静态试验改为动态试验，对座椅安全提出了更高的要求。考虑到安全性和轻量化设计，LFT（长玻璃纤维增​​强热塑性塑料）用于替代原有的钢制座椅靠背框架。结合吸能模型和拓扑优化，进行了前向加载和后向加载两种工况下的力传递路径和详细结构设计。为了分析乘员保护性能，建立了复合材料座椅和HybridIII假人的数值模型，并对LFT座椅靠背框架的安全性和轻量化效果进行了优化验证。