摘要
通过分形接触理论,建立了分布式拉杆转子轮盘接触刚度模型,对轮盘接触面的法向和切向接触刚度进行了计算,分析了接触刚度随轮盘面粗糙度和拉杆预紧力的变化规律;在此基础上,建立了考虑轮盘接触效应的拉杆转子动力学模型,通过固有特性研究,得到其固有频率和振型.分析发现,拉杆转子随表面粗糙度的减小和拉杆预紧力的增大,其整体刚度和固有频率都有所提高;预紧力较小时,固有频率上升速度快,随着预紧力的增加固有频率上升速度缓慢,且粗糙度越小固有频率越大.
Establish the contact stiffness model of the distributed rod fastening rotor using the fractal contact theory to calculate the normal and tangential contact stiffness,analyse the variation tendency of the contact stiffness along with the surface roughness and the pre-tightening force;further,set up dynamic model of the rod fastening rotor take into account the contact effect of the wheel and obtain the natural frequency and mode shape through the natural characteristic research.The analysis result is the decrease of the surface roughness and the increase of the pre-tightening force,the overall stiffness and natural frequency has improved;pre-tightening force is small,the speed rising fast,with the growth of the pre-tightening force speed is slow,and the lower the roughness natural frequency is greater.
出处
《陕西科技大学学报（自然科学版）》
2016年第6期160-163,196,共5页
Journal of Shaanxi University of Science & Technology
基金
国家自然科学基金项目(51475311)
关键词
拉杆转子
分形接触刚度
模态分析
固有频率
rod fastening rotor
fractal contact stiffness
modal analysis
natural frequency
