在工作载荷等基本随机变量的概率特性已知的情况下，使用二阶矩方法对CA141汽车半轴的可靠性进行设计，并编制实用的计算机程序，可准确地得到CA141汽车半轴的可靠性设计参数。此方法是一种较为实用和有效的方法，对机械零部件的可靠性设计具有通用性。 The second-moment method is used to design the reliability of the semi-axle of CA141 car and the practical computer program is compiled to get the reliability of semi-axle of CA141 car accurately under the condition that the probability of basic random variables such as working load is known. Design Parameters. This method is a more practical and effective method for the reliability of mechanical parts design versatility.