机械零件多失效模式相关可靠度算法研究

机械零件可靠性在工程设计中具有重要价值，但由于多失效模式间的相关性，使得可靠性设计计算变得很困难。在O．Detlevsen二阶窄界限理论的基础上，提出一种仅考虑主．次失效模式相关系数的计算方法，并以一组实际应用中传动轴多失效模式的数据为例，验证所提出的方法。计算结果与Monte Carlo仿真精确计算结果比较接近，表明该算法切实可行，结果完全满足精度要求。

RESEARCH ON CALCULATING THE RELIABILITY OF MECHANICAL COMPONENT WITH CORRELAED FAILURE MODES

The reliability of mechanical component is of great value in engineering design, but the correlation of the failure modes of mechanical component brings the difficulty on calculating the reliability. The simplification way to calculate the reliability of component with correlated failure modes is presented, and it is proved by the narrow reliability bounds theory that was presented by O. Detlevsen. At last, the simplification method is compared with the Monte Carlo simulation by the example calculating the reliability for axis. The result shows that the simplification method considering the correlation is simple, efficiency and accurate, and is of great value for calculating the reliability of correlated failure modes in engineering design.