Railway safety event chain modeling method and system based on protective layer

The invention discloses a railway safety event chain modeling method and system based on a protective layer and a common node, and the method comprises the following steps: collecting and sorting railway safety events, and identifying railway safety precause events; for railway safety precause events, safety protection measures are identified, corresponding protection layers are determined, and consequence events acted by the protection layers are analyzed; performing protection layer-based railway safety event structured description through knowledge expression, and establishing a railway safety event knowledge expression database; establishing a railway safety event unit event chain based on a protection layer, and forming a railway safety event unit event chain database; and establishing a railway safety event chain model based on the protection layer and the common node. The invention provides a railway safety event chain modeling method based on a protective layer and common nodes. 本申请公开了一种基于保护层、共同节点的铁路安