螺纹连接模拟分析的简化建模  

A simplified modeling technique for bolt thread simulation

作　　者：赵军涛[1] 李韬[1] 杨甲申[1] ZHAO Jun-tao;LI Tao;YANG Jia-shen(China National Heavy Machinery Research Institute Co.,Ltd.,Xi'an 710032,China)

机构地区：[1]中国重型机械研究院股份公司,陕西西安710032

出　　处：《重型机械》2019年第2期69-72,共4页Heavy Machinery

摘　　要：螺栓螺纹仿真简化建模方法可以给出非常接近真实螺栓螺纹受力仿真分析数据结果而不需要建立详细的几何模型和网格二次划分,在大型复杂装配体的模拟分析中,能节约大量的计算时间和成本。同时,本文通过专用单元方式施加了螺栓预紧力。文章描述了实际螺纹和简化螺栓螺纹的区别,分别创建了螺纹、盖板和底板模型,并给出了螺栓预紧力作用截面和接触对。分析结果显示螺栓轴向位移的最大值和最小值误差分别为2.4%和1.9%,相应位置上Von Mises应力相差很小,简化模型计算时间是实际模型的1/10。The simplified modeling technique for bolt thread simulation delivers approximate results with the near accuracy of the true threaded bolt model,but without the need for detailed thread geometry and refined mesh discretization.The method also offers a significant savings in simulation time and costs for large complex assembly with bolt pretension loading.The article describes to give bolt pretension loading with the special element.It explains the difference between true and simplified model,meanwhile modeling the bolt with cover and base plate and giving pretension loading section and contact pairs.The result reveals the max and min error of bolt axial displacement are 2.4%and 1.9%respectively,the Von Mises stress is approximation in the same position,the simplified modeling simulation time is about 1/10 of the true threaded bolt model simulation time.

关 键 词：螺栓 螺纹 接触单元 预紧力 

分 类 号：U213.5[交通运输工程—道路与铁道工程]