针对共载表决系统中单元服从Gamma退化过程的情况,根据Gamma退化过程的特性,将系统各单元在各载荷阶段的寿命过程通过退化等效模型折合到后续寿命过程中,给出了基于退化等效的共载表决系统可靠性模型表达式,并根据Gamma退化过程尺度参数的不同与原有共载表决系统可靠性模型进行了对比,建立了系统可靠性的蒙特卡罗仿真方法.算例证明了可靠性模型及算法的可行性,并分析了公式方法与仿真方法在计算时间和精度方面的特点. According to the characteristics of Gamma degradation process, the lifetime of each unit in each load phase is converted to the subsequent life process through the degradation equivalent model, and the degradation of Gamma degradation process based on degradation and so on Efficiency and reliability of load-bearing voting system, and compared with the reliability model of the original load-bearing voting system according to the different scaling parameters of Gamma degradation process, a Monte Carlo simulation method of system reliability is established. The feasibility of the reliability model and the algorithm is also analyzed. The characteristics of the formula method and the simulation method in terms of computation time and accuracy are also analyzed.