Aiming at the problem that It is difficult to model and analyze the dynamic reliability for net systems by the traditional reliability modeling methods, a new net system dynamic reliability modeling method based on generalized stochastic petri net (GSPN) is proposed. On the basis of discussing the formalization definition of GSPN and constructing the relation between the modeling elements of GSPN and the parameters of reliability model, it describes the process of modeling the dynamic reliability model for net system particularly. Finally, a certain type of integrated vetronics system is selected as an example, and the dynamic curves of availability are obtained by simulation experiment, and the proposed modeling method is validated.%针对传统可靠性建模方法难以描述和评价网络系统动态可靠性这一难题,提出一种基于广义随机Petri网(generalized stochastic petri net,GSPN)的网络系统动态可靠性建模方法,在讨论GSPN的形式化定义和建立GSPN建模要素与可靠性模型参数之间对应关系的基础上,详细描述了网络系统动态可靠性建模的过程；最后以某型车电系统为例,通过仿真实验得到了系统可用度指标的动态变化曲线,验证了所提方法的有效性.
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