The invention relates to the technical field of
hydropower station safety, and discloses a
hydropower station underground powerhouse flooding fault rapid
simulation prediction method, which comprises the following steps: S1, constructing a rapid
simulation analysis model, a parameter
system of the rapid
simulation analysis model comprising geometric parameters, hydraulic parameters and disaster parameters; s2, dividing a
hydropower station underground powerhouse space of the rapid simulation analysis model into a plurality of reservoirs, and establishing a
water balance equation; s3, the drainage capacity of a drainage
system of the rapid simulation analysis model is calculated; s4, establishing a
water leakage risk point leakage model of the rapid simulation analysis model, and calculating water
inlet flow; and S5, based on the
mass conservation equation and the
momentum conservation equation, simulating the whole process from initial leakage to complete submerging by adopting a
time stepping algorithm, and outputting a prediction simulation result. The method accurately simulates and predicts the flow and
water level elevation penetrating into the
plant according to the
spatial structure characteristics of the underground
plant, so as to improve the emergency decision accuracy and response speed.