根据对城市地震次生灾害发生机理的分析,绘制了地震次生灾害演化的因果回路图和存量流量图。在此基础上借助系统动力学仿真软件Vensim PLE,对城市地震次生灾害演化过程建立了系统动力学模型,并进行了模型验证及仿真,得出了不同防震抗灾能力下城市地震次生灾害可能造成的损失情况,为城市防震救灾工作提供参考。 According to the analysis of the mechanism of secondary disasters in urban earthquakes, the causal circuit diagram and stock flow chart of the evolution of secondary disasters were drawn. On this basis, the system dynamic simulation software Vensim PLE is used to establish the system dynamics model for the evolution of secondary disasters in urban earthquakes, and the model verification and simulation are carried out. It is concluded that the secondary disasters of urban earthquakes under different earthquake-resistant and disaster-resistant abilities Resulting in the loss of the city for disaster relief work to provide a reference.