2010 螺纹副承载的分布规律.pdf

机械工程学报 JOURNAL OF MECHANICAL ENGINEERING 第 46 卷第 9 期 2010 年 5 月 Vol . 46 No. 9 May 2010 DOI : . 螺纹副承载的分布规律* 陈海平曾攀方刚雷丽萍( 清华大学机械工程系北京 100084) 摘要: 介绍螺纹副载荷分布特点以及螺纹副承载分布的解析方法、光弹试验方法和有限元法。基于 ANSYS 平台建立参数化的螺纹副承载分布有限元模型,通过 SOPWITH 和 YAMATOTO 两种解析方法验证螺母轴力计算结果,将各扣螺纹牙承载比例与光弹冻结试验结果进行对比,以验证有限元模型的可靠性。接着系统考察螺纹类型、螺距 P、螺纹副径向尺寸系数 d / D 、啮合扣数 N、摩擦因数μ和螺纹副材料弹性模量比 E b / E n等因素对螺纹副承载分布的影响,并对主要影响因素进行回归分析。关键词: 螺纹副承载分布 ANSYS 有限元分析中图分类号: TH12 Load Distribution of Bolted Joint CHEN Haiping ZENG Pan FANG Gang LEI Liping (Department of Mechanical Engineer ing, Tsinghua University, Beijing 100084) Abstract :The load distribution of the bolted joint is introduced, and the analytical, photoela sticity and finite element methods are discussed to study the load distribution. Th e parametric finite element model to res earch load distribution of bolted joint is established by using ANSYS. The axial load of nut is verified by SOPWITH and YAMATO TO analytical methods, and load ratio among the threads pared with the phot o elasticity text result to verify the relia bility of the finite element model. Then the factors, such as thread type, pitch P, radial dimension coefficient d / D, engaging threads number N, coefficient of friction μ and material elastic modulus ratio E b / E n which affect the load distribution are systematical ly studied, and the main factors a