摘 要
汽车交通事故已被公认为是威胁人类安全的“第一公害”。随着我国国民经济的快速增长，人民生活水平的不断提高及安全意识的增强，汽车工业和交通运输事业将不断地向高层次发展，对汽车安全性必将提出新的要求。改进汽车的安全性不仅可减少汽车交通事故中人员的伤亡和经济损失，并直接影响交通运输环境和人民生活的安定。安全带作为一种有效碰撞损伤防护装置已广泛用到了现代汽车上。而汽车安全带高度调节器作为现代安全带总成不可或缺的一部分，其安全性能的重要性也就可见一斑了，其研究意义颇为重大。
论文主要结合CAE软件研究了有限元法在汽车安全带高度调节器关键组件应力分析和形变分析中的应用。论文中利用CAE软件ANSYS对高度调节器固定滑板进行了几何建模，总结了前后处理软件ANSYS的有限元功能，详述了几何模型的建立、有限元网格的划分、材料属性和单元属性的建立等几个方面的相关原理和操作。阐述了四大强度理论的应用条件和范围，根据固定滑板材料（45#）属性最后选用第一和第四强度理论对模拟结果校核，结果验证了固定滑板强度满足设计要求。论文设计过程中得到了一些有用的结论，为下一步固定滑板结构优化创造了条件。
关键词：ANSYS 固定滑板 静力分析 应力分析 形变分析
Abstract
Automotive traffic accidents have been became“the first public harm”which threaten human safe.As the fast rising of national economy,improvement of living standard,enhancement of safety consciousness,automotive industry and traffic utility will develop to a senior level,a new demand will be raised to automotive safety.Improvement of automotive safety not only can reduce the casualties in automotive traffic accidents,but also affect the traffic environment and the stable of people livingdirectly.Safe-belt have been used in modernautomobiles as a device which can protect the crashing damage effectively.The safe-belt height adjuster is an indispensable part of modern safe-belt assembly, and its importance of safety can be easily seen, and is quite significant for its research.
The paper introduces the application of FEM in the key components of safe-belt height adjuster for stress and deformation analysis using CAE software.We found the model of the fixed slider throng ANSYS,summarized the FEM function of ANSYS,detailed elaborate the principle and operation of model importion,grid dividing of FEM,and the establishment of material and cell properties.Also expounde the application range and conditions of the four major strength theory,do a simulation results check using the first and fourth strength theory according to the fixed slider material (45#) attributes.The result shows that the strength meets the design requirements.It carries out some useful conclusions through the design process,
and creats good conditions for the next structural optimization of the fixed slider.
