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首页> 外文学位 >An innovative inflatable morphing body structure for crashworthiness of military and commercial vehicles.
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An innovative inflatable morphing body structure for crashworthiness of military and commercial vehicles.

机译：一种创新的充气变形车身结构，适用于军用和商用车辆的防撞性。

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摘要

The greatest demand facing the automotive industry has been to provide safer vehicles with high fuel efficiency at minimum cost. Current automotive vehicle structures have one fundamental handicap: a short crumple zone for crash energy absorption. This leaves limited room for further safety improvements, especially for high-speed crashes. Breakthrough technologies are needed. One potential breakthrough is to use active devices instead of conventional passive devices.; An innovative inflatable bumper concept, called the "I-bumper," is developed in this research for improved crashworthiness and safety of military and commercial vehicles. The developed I-bumper has several active structural components, including a morphing mechanism, a movable bumper, two explosive airbags, and a morphing lattice structure with a locking mechanism that provides desired rigidity and energy absorption capability during a vehicular crash. Another additional innovative means for improving crashworthiness is the use of tubes filled with a granular material to absorb energy during the process of a crash.; An analytical design model is also developed in this research for the optimal design of the I-bumper system, with a focus on up-front design. Major design variables include those of the explosive airbag, the morphing lattice structure, and the granular material used in the front posts. The morphing lattice structure is designed to maximize energy absorption during the crash impact. The granular material in the front posts is used for further crash energy management in the passive stage. The new design methodology has been implemented in MATLAB and validation has been conducted at a full vehicle level in order to demonstrate the effectiveness of the I-bumper for improved suitability in a high-speed crash.; In future research, this I-bumper can be extended to address other types of crashes (for example, side impacts, rear impacts, roll over, and collision with pedestrian) and to innovative blast-worthiness applications for military vehicles.; The main achievement of this work has been an introduction of the I-bumper and the development of an analytical model of the I-bumper for absorbed energy during a crash.
机译：汽车工业面临的最大需求是以最低的成本提供更安全，燃油效率更高的车辆。当前的汽车结构具有一个基本的障碍：用于吸收碰撞能量的较短的压溃区。这为进一步提高安全性（尤其是对于高速碰撞）留下了有限的空间。需要突破性技术。一个潜在的突破是使用有源器件代替传统的无源器件。这项研究开发了一种创新的充气式保险杠概念，称为“ I型保险杠”，旨在提高军用和商用车辆的耐撞性和安全性。研发的工字型保险杠具有多个主动结构部件，包括变形机构，可移动保险杠，两个爆炸性安全气囊以及带有锁定机构的变形晶格结构，该结构在车辆碰撞时提供所需的刚度和能量吸收能力。另一个提高耐撞性的创新手段是使用填充有颗粒状材料的管在碰撞过程中吸收能量。在这项研究中，还针对I型保险杠系统的最佳设计开发了一个分析设计模型，重点是前期设计。主要设计变量包括爆炸性安全气囊，变形晶格结构和前柱中使用的粒状材料。变形晶格结构旨在在碰撞时最大程度地吸收能量。前柱中的颗粒状材料用于被动阶段的进一步碰撞能量管理。新的设计方法已在MATLAB中实现，并已在整车级别进行了验证，以证明I型保险杠在高速碰撞中提高适用性的有效性。在未来的研究中，这种I型保险杠可以扩展到处理其他类型的碰撞（例如，侧面碰撞，后部碰撞，侧翻和与行人碰撞），并扩展到军用车辆的爆炸性创新应用。这项工作的主要成就是介绍了I型保险杠，并开发了I型保险杠在碰撞时吸收能量的分析模型。

著录项

  • 作者

    Lee, Dong Wook.;

  • 作者单位

    University of Michigan.;

  • 授予单位 University of Michigan.;
  • 学科 Engineering Mechanical.
  • 学位 Ph.D.
  • 年度 2008
  • 页码 179 p.
  • 总页数 179
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;
  • 关键词

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