介绍了圆柱滚子轴承的3自由度模型的建立方法,分析了滚子与套圈、滚子与保持架、套圈与保持架间的接触或碰撞关系。介绍了使用Fortran 90编写的轴承动力学分析软件包BA的程序架构。得到了滚子的运动速度、滚子与内、外圈间的接触载荷与保持架质心的运动轨迹等,并通过案例分析了圆柱滚子轴承的动力学性能,验证了BA的分析能力。 The establishment of 3 DOF model of cylindrical roller bearing is introduced, and the contact or collision between roller and ferrule, roller and cage, ferrule and cage is analyzed. Introducing the program architecture of the BA package for bearing dynamics analysis written in Fortran 90. The moving speed of the roller, the contact load between the roller and the inner and outer rings and the movement trajectory of the center of mass of the cage are obtained. The dynamic performance of the cylindrical roller bearing is analyzed through examples to verify the analytical capability of BA.