Determination of the risk propagation path of cascading faults in chemical material networks based on complex networks

Abstract

AbstractIn a chemical material network, a small fault is easy to spread and cause serious consequences, which is the embodiment of a complex network cascading fault. In order to ensure the safety and stability of chemical production, it is necessary to study the cascading fault propagation of a chemical material network. Firstly, the chemical material network model is constructed, and the SR algorithm is used to identify the important nodes in the network, which is the basis for selecting attack nodes. Secondly, the fault propagation strength is defined by the fault propagation probability and material hazard degree. The fault propagation probability is calculated by constructing the load cascading fault model of nodes. Based on the rough set theory and analytic hierarchy process (AHP), the index weights of flammability and explosiveness, toxicity, and corrosiveness are calculated to get the material hazard degree. Finally, based on the fault propagation strength, the risk propagation path of cascading fault is obtained by the ant colony algorithm. The case analysis shows that the proposed method can find the risk propagation path of cascading faults in material networks in the chemical production process, which provides certain basis for cascading fault prevention, selection of key monitoring variables, and risk assessment.