滚动轴承摩擦力矩的试验数据研究-机械设计及理论专业论文.docxVIP

河南科技大学硕士学位论文 河南科技大学硕士学位论文 第 第 1 章 绪论 IV IV PAGE PAGE 11 Nonlinear factor affect friction torque, so rolling bearing friction torque is nonlinear. Chaos theory can solve this kind of nonlinear problem, so chaos theory can be used to research it. If the calculated max Lyapunov index is more than zero, it proves that rolling bearing friction torque system is chaotic. On that basis, nonlinear parameters including correlation dimension and box dimension are researched in order to analyze rolling bearing friction torque’s nonlinear dynamics problems. Research shows: correlation dimension presents saturation phenomenon, and this can also distinguish that friction is chaotic. Besides, correction dimension and box dimension also go up with the increase of speed. Do the related analysis between the uncertainty and nonlinear evaluation results in the end, and find the quantitative relationship between them. From the calculation of grey confidence level between rolling bearing friction toque’s uncertainty and nonlinear, we get the result that the grey confidence level between uncertainty and nonlinear is quite high, all above 80%. There is a certain grey relation between rolling bearing friction torque’s uncertainty and nonlinear. Elementary theories and methods studied by this paper are of versatility and feasibility. Poor information theory and chaos theory accord with rolling bearing’s uncertainty and nonlinear characters. The analysis of friction torque experimental data can establish a further foundation to rolling bearing’s uncertainty and nonlinear characters. It is more important to improve bearing’s life span, precision and so on. KEY WORDS: rolling bearing, friction torque, uncertainty, nonlinear character. Dissertation Type: application study 第1章 绪论 1.1 摩擦力矩介绍 滚动轴承摩擦力矩是指滚动摩擦、滑动摩擦和润滑剂摩擦的总和产生的阻滞 轴承运转的阻力矩。 静态力矩（也称启动力矩）是指滚动轴承两套圈从静止状态到开始相对转动 的瞬间所需克服的摩擦阻力矩。 动态力矩是指轴承内外套圈相对转动时所需克服的摩擦阻力矩。在测量时一 般把最大力矩、平均力矩和力矩差作为评定轴承动态摩擦性能参数。 本课题主要研究动态力矩，它测量的是滚动轴承在旋转过程中的摩