对如下可靠性问题进行仿真
现在有两种方案：方案一是损坏一个更换一个；方案二是一旦有轴承损坏就全部更换．试通过计算机仿真对这两种方案做出评价．,The following issues on the reliability of simulation now there are two programs: a program to replace a damaged one　program Second, once all the replacement of damaged bearings. Examination by computer simulation to assess the two programs.