Earthquake is one of the main geological disasters that cause slope instability. The stability analysis of soil-rock mixture slope under earthquake is made with FLAC3D in this paper. According to finding the shear strain concentrated deformation zone and the size of the displacement, they can help us to find the possible instability of the scope and location. The study result shows that the slope is stable in the natural state and certain displacement would occur in the potential slide mass of the slope under earthquake, and this must be taken into serious consideration in practical engineering.

This paper analyses the stress and the displacement with multiple loads by the structure of the linear static. Use the static solver provided by UG NX Nastran; get the parameters of the stress and the displacement of the component with some kinds of loads. Not only get the result for each subcase, but also for any subcase in the combined quickly. It provides facilitation for comparison and analysis of each subcase and the combined case on some calculation results.