作　　者： ; ;

机构地区： 哈尔滨工业大学航天学院航天工程系

出　　处： 《哈尔滨工业大学学报》 2001年第5期644-645,650,共3页

摘　　要： 历史上形成的计算滚动轴承刚度的经验公式 ,没有指出如何由各自变量的变动范围预报因变量的变化范围 ,没有给出刚度相应自变量的某一置信度的误差区间带 .误差区间带往往随着各自变量远离实验数据均值而变宽 .例如 ,在小载荷或大载荷时 ,由经验公式计算出的刚度值将产生较大的误差 .这些在现代实验数据统计处理上是非常重要的 .为此由线弹性理论出发导出航天航空滚动轴承刚度的理论公式 .列举三种航空轴承 ,分别用理理论公式和经验公式计算了某一载荷时的相应刚度 ;两者吻合较好 .特别指出 :“基于线弹性理论的理论公式中的载荷等自变量的变化适用范围比经验公式要宽的多 .理论公式中的计算刚度误差可由各自变量误差直接求得 ,较精确计算时或选用轴承时应以理论公式为准 . The empirical formulae formulated in history for calculation of rolling bearing stiffness do not show how to predict the accuracy of dependant variables from the accuracy of independent variables or to what extent the stiffness is reliable. The magnitude of errors will be widened as the independent variables move away from the average mean values of experimental data, for instance, there will be larger errors for stiffness obtained using the empirical formulae for a small or large load. These are very important for statistic treatment of modern experimental data. Theoretical formulae have been derived by following the linear elasticity theory for calculation of aerospace rolling bearing stiffness, and the stiffness of three kinds of aerospace bearings are calculated using theoretical and empirical formulae respectively for a particular load, and there is a good agreement between the results. The scope of applicability for independent variables, such as loads, in the theoretical formulae based upon the linear elasticity theory is much wider than that in the empirical formulae. The errors of the calculated stiffness in the theoretical formulae can be directly obtained from the errors for the independent variables, and theoretical formulae should be used for more accurate calculation or selection of bearings.

关 键 词： 滚动轴承 刚度 理论公式 计算 航空 航天

领　　域： [航空宇航科学与技术] [航空宇航科学技术] [航空宇航科学与技术]