摘要
为探究振动载荷频率对螺栓法兰连接结构松动行为的影响规律仿真分析,首先建立了带螺旋升角螺纹的螺栓法兰连接结构精细有限元模型,进行了全六面体网格划分,采用了施加力矩法施加初始预紧力,运用Yamamoto方法和Spowith方法验证了模型的有效性,然后进行了螺栓松动条件理论分析,最后进行了振动载荷下螺栓法兰连接结构松动行为仿真计算,基于螺栓预紧力变化和螺纹接触面、螺栓头接触面黏着-滑移接触状态变化情况分析了振动载荷频率对螺栓松动行为的影响规律。结果表明,存在一振动载荷频率临界值,使得螺栓松动最不容易发生;一定范围内,低振动载荷频率较高振动载荷频率振更容易引起螺栓松动;当达到一定值后,振动载荷频率将对螺栓松动影响较小。
In order to explore the influence law of vibration load frequency on the loosening behavior of bolt flange connection structure,firstly,a fine finite element model of bolt flange connection structure with spiral rising angle thread is established,the full hexahedron grid is divided,the initial preload is applied by applying torque method,the effectiveness of the model is verified by Yamamoto method and Spowith method,and then the theoretical analysis of bolt loosening conditions is carried out,Finally,the loosening behavior of bolt flange connection structure under vibration load is simulated.Based on the change of bolt preload and the change of adhesion slip contact state of thread contact surface and bolt head contact surface,the influence law of loading frequency on bolt loosening behavior is analyzed.The results show that there is a critical value of vibration load frequency,which makes bolt loosening the least likely to occur;In a certain range,low loading frequency vibration load and high loading frequency vibration load are more likely to cause bolt loosening;When a certain value is reached,the vibration load frequency will have little effect on bolt loosening.
作者
王开平
闫明
苏东海
孙自强
WANG Kai-ping;YAN Ming;SU Dong-hai;SUN Zi-qiang(School of Mechanical Engineering,Shenyang University of Technology,Shenyang 110870,China)
出处
《组合机床与自动化加工技术》
北大核心
2023年第5期36-38,44,共4页
Modular Machine Tool & Automatic Manufacturing Technique
基金
国家自然科学基金(51705337)
辽宁省“兴辽英才计划”项目(XLYC1802077)。
关键词
振动载荷频率
螺栓法兰连接结构
松动行为
有限元模型
仿真分析
vibration load frequency
bolted flange connection structure
loosening behavior
finite element model
simulation analysis
