基于减速式滑台简化有限元模型的研究与应用

Research and Application on the Deceleration Sled Simplified Finite Element Simulation

本文首先基于减速式滑台的基本结构,运用Ansys/Ls-Dyna软件建立减速式滑台的简化有限元模型,并通过GB 13057-2014客车座椅动态试验与GB 27887-2011儿童座椅动态试验来验证简化有限元模型的有效性。其次,利用有限元计算来探讨滑台质量与钢筋摆放方式对减速度曲线的影响:在钢筋摆放方式和滑台初速度相同时,滑台质量越大,减速度曲线的持续时间越长;在滑台质量和滑台初速度相同时,钢筋摆放越集中,减速度曲线的峰值越大。利用本文所建立的减速式滑台有限元模型进行计算,可以为各类标准、企业所要求的减速度曲线的实现提供指导。

Based on the basic structure of deceleration sled,the paper established an simplified finite element model by Ansys/Ls-Dyna software, which is verified by GB 13057-2014 passenger seat simulating impact test and GB 27887-2011 child seat simulating impact test.Then, how the sled mass and the layout of the steel bars influence the decelerating curves are being discussed through the FE calculation:when the layout of the steel bars and the initial velocity of the sled remain unchanged, the heavier the sled is, the longer the deceleration curve continued;when the sled mass and the initial velocity remain unchanged, the more centrally the steel bars are being placed, the larger the peak value of the deceleration curve is. What’s more, the finite element model in this paper can provide some guidance in the daily tests.