The relationship of sensitivity for the system failure probability was firstly constructed between multiple failure modes and single failure mode.
此模型首先给出了多个失效模式系统失效概率敏度与单夹杂裂纹扩展寿命失效概率敏度之间的关系；
The objective function is the cost of pavement structures. Multiple failure modes are considered in this model, system reliability is calculated using Monte Carlo method.
该模型中考虑了路面的多种失效模式，并用蒙特卡洛法计算路面的系统可靠度。
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