Method for improving accuracy of simulating landslide disaster chain by smoothed particle method

The invention relates to the field of geological disaster prevention and control, in particular to a method for improving the accuracy of simulating a landslide disaster chain by using a smoothed particle method, which comprises the following steps of: 1, collecting a to-be-simulated target landslide and survey data of a disaster chain influence range; determining geological conditions, landforms, landslide body physical and mechanical parameter test results and water body physical and mechanical parameters of the target landslide and disaster chain influence range based on the survey data; step 2, constructing a numerical analysis model for performing landslide disaster chain numerical simulation based on a smoothed particle method; 3, setting initial calculation parameters based on the numerical analysis model constructed in the step 2; and 4, starting simulation calculation, updating the effective radius of any calculation time step according to a preset rule, and continuing calculation of the next time st