研究表明，即使强度不退化，零件的可靠度和失效率也会随时间逐渐降低；
The result shows that even without strength degeneration, the reliability and failure rate of components decrease with time.
在载荷和强度分布已知的情况下，可直接运用本文模型计算零件在任意时刻的可靠度和失效率。
On condition that the probability characteristics of load and strength are known, the reliability and failure rate of components at any time can be calculated by the model proposed.
为了提高采用蒙特卡罗方法计算结构可靠度的效率和精度，提出了一种部分解析的失效面上的复合蒙特卡罗方法。
A partly analytical composite Monte-Carlo method on structural failure hyperplane was proposed to efficiently and accurately calculate structural reliability.
为了提高采用蒙特卡罗方法计算结构可靠度的效率和精度，提出了一种部分解析的失效面上的复合蒙特卡罗方法。
A partly analytical composite Monte-Carlo method on structural failure hyperplane was proposed to efficiently and accurately calculate structural reliability.
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