By detailed sedimentological studies,typical sediments derived from modified-density flow and shedding flow are found in the central mud diapir zone and its transitional area towards the basin margin in Yinggehai basin.

Assuming the two phase fluid of water and air as a variable density fluid, the mathematical model of the air curtain breakwater was developed based on the platform of Fluent software.

Topological optimization system of variable density method based on finite element software;

Interface depths inversion of potential field data with variable density model;

Application of variable density method to light-weight design of cylinder block

The Research of Structure Topology Optimization Based on Variable Density Method;

Based on finite element method,variable density method was employed to optimize the configuration of adherends in overlap region,and the curve fitting was applied to attain proper configuration.

By variable density method, an optimal topology model is established with the help of the software ANSYS to support the optimal topology design of the horsehead pumping unit.