| 机械螺栓法兰连接的有限元力学模型比较研究 |
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| 引用本文： | 徐超,余绍蓉,郑晓亚,张铎.机械螺栓法兰连接的有限元力学模型比较研究[J].机械设计与制造,2009(6). |
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| 作者姓名： | 徐超 余绍蓉 郑晓亚 张铎 |
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| 作者单位： | 1. 西北工业大学航天学院,西安,710072
2. 中国工程物理研究院总体工程所,绵阳,621900 |
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| 基金项目： | 国家自然科学基金，中国工程物理研究院联合资助基会项目 |
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| 摘 要： | 机械螺栓-法兰连接结构中存在着复杂的接触、摩擦和预紧等非线性因素.螺栓-法兰连接结构的有限元力学模型应当充分包含这些因素.首先介绍了连接结构接触分析的有限元法理论,然后比较研究了二维轴对称力学模型和三维实体模型在螺栓一法兰连接结构建模中的差剐,之后研究了温度载荷法、过盈配合法和等效外载法等三种不同的螺栓预紧力建模方法.计算结果表明:二维模型在处理螺栓-_法兰连接结构上计算耗费小,但计算精度较三维模型差别较大,结果粗糙;三种预紧力模拟方法都能模拟螺栓预紧载荷,但在适用范围、等效方法和计算精度等方面有区别.
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| 关 键 词： | 机械 接触 螺栓-法兰 有限元模型 |
Comparative evaluation of finite element models for mechanical structures with bolted joints |
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| XU Chao,YU Shao-rong,ZHENG Xiao-ya,ZHANG Duo.Comparative evaluation of finite element models for mechanical structures with bolted joints[J].Machinery Design & Manufacture,2009(6). |
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| Authors: | XU Chao YU Shao-rong ZHENG Xiao-ya ZHANG Duo |
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| Affiliation: | 1College of Aeronautics;Northwestern Polytechnical University;Xi'an 710072;China;2Institue of System Engineering;China Academy of Engineering Physics;Mianyang 621900;China |
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| Abstract: | Contact,friction and preload are the most important factors for modeling mechanical structures with bolted joints.Reasonable finite element models should fully consider these factors.A contact finite element analysis method was first introduced.A comparison between 2D axisymetric and 3D solid finite element analysis type was present.Different methods,such as effective temperature,effective force and interference fit,were used to modeling pretensions of bolt under tight moments.It is shown that 2D analysis h... |
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| Keywords: | Mechanical structures Contact Bolted-flange joints Finite element |
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