Abstract

The awareness towards environmental conservation and protection emerges issues on new technology leading to the development of technologies that are more sensitive and environment-friendly. One of the ways to have cleaner and environmentally-friendly vehicles is to adopt the electric vehicle (EV) concept. EVs present a research challenge for safety engineers. The vehicle crash tests are complex and complicated experiments with large non-linear deformations. EVs are designed using conventional vehicle design strategies but do not contain conventional materials or structures hence it is crucial to analyse their crash behaviour. The conventional vehicle is used in this work as a donor for EV to identify expected deformation and acceleration loads from real crashes which will serve as lower limits for converted vehicles. This work lays down a novel procedure to select all the critical components in the process of conversion of a conventional vehicle to EV. The converted EV is checked against different load conditions as specified by Euro NCAP. A special load case of rear oblique side pole impact was introduced in this work to evaluate performance of vehicle structure in protection of battery pack. The entire work is simulated with the help of non-linear explicit finite element software LS-DYNA and ANSA as a pre-processor. The various results obtained such as deceleration curves, intrusion measurements, etc., and factors that influence vehicle crash simulation, before and after the conversion are analysed with an objective to improve the design of vehicle structure further to influence the overall crash characteristics of the converted vehicle.

摘要

对环境保护的意识出现了新技术的问题，导致了更敏感和环境友好的技术的发展。拥有更清洁、更环保的汽车的方法之一是采用电动汽车 (EV) 概念。电动汽车给安全工程师带来了研究挑战。车辆碰撞试验是复杂而复杂的实验，具有较大的非线性变形。电动汽车是使用传统的车辆设计策略设计的，但不包含传统的材料或结构，因此分析其碰撞行为至关重要。在这项工作中，传统车辆被用作 EV 的供体，以识别来自实际碰撞的预期变形和加速载荷，这将作为改装车辆的下限。这项工作制定了一种新颖的程序，可以在将传统车辆转换为电动汽车的过程中选择所有关键部件。根据 Euro NCAP 指定的不同负载条件检查转换后的 EV。本文引入了后斜侧柱碰撞的特殊载荷工况，以评估车辆结构在保护电池组方面的性能。整个工作在非线性显式有限元软件LS-DYNA和ANSA作为预处理器的帮助下进行模拟。对改装前后的减速度曲线、侵入测量等各种结果，以及影响车辆碰撞模拟的因素进行分析，以期改进车辆结构设计，进一步影响改装后的整体碰撞特性。车辆。