一种新型高能后防钻保护装置的设计

一种新型高能后防钻保护装置的设计(中文4500字,英文3000字)
摘要
近年来，车辆设计领域通过将其主要兴趣集中在被动和主动安全水平上而逐步发展。对乘客安全最有害的案例之一是汽车和重型车辆（卡车）之间的碰撞。
实际上，事实上，当发生这种情况时，汽车的乘客会遭受最大的损害。这是因为两辆车之间存在相当大的结构差异，并且缺乏减少汽车乘客受伤的装置。在这项工作中，作为先前考虑的结果，我们处理了超过3.5吨重型车辆的新保护系统的设计。与传统的后保护装置相比，这里提出的新型后防钻保护装置可以消耗更多的能量;这减少了涉及卡车撞击的汽车乘客所遭受的损害。为了模拟新型保护装置在不同类型的碰撞中的行为，已经进行了动态有限元法（FEM）分析。新型保护系统与标准保护系统的比较表明，新设计的保护系统在能量吸收和减速峰值方面具有更好的性能。
关键词：后防钻撞保护装置，动态有限元法，碰撞分析。
Design of a new high energy rear underrun protective device
Abstract
In recent years the vehicle design field has followed a progressive evolution by focusing its main interest on passive and active safety levels. One of the most injurious cases for the safety of passengers is the crash between a car and a  heavy vehicle (truck).
Generally, in fact, when such an occurrence happens, the greatest damage is suffered by the passengers of the car. This is because of the considerable structural difference between the two vehicles and the lack of devices to reduce the injuries of the car passengers. In this work, as a consequence of the previous considerations, we deal with the design of a new protective system for heavy vehicles over 3.5 tons. The new rear underrun protective device presented here, compared to the traditional one, can dissipate a greater amount of energy; this reduces the damage suffered by the passengers of a car involved in an impact with a truck. To simulate the behaviour of the new protective device during different kinds of crashes, dynamic finite element method (FEM) analyses have been carried out. The comparison between the new protective system and the standard one has shown that the new designed protective system has better performances in terms of energy absorption and peaks of decelerations.
Keywords: RUPD, FEM, crash analyses.