Study on Modular Simulation of Fluid-Structure Interaction in Fluid-Conveying Pipelines Based on Simulink

The dynamic response characteristics of Fluid-Structure Interaction (FSI) in fluid-conveying pipelines have always been a research hotspot in the field of pipeline transportation. The related mathematical models are mainly solved by numerical methods. In many common numerical methods, complex program codes need to be written, which affects the efficiency of simulation analysis. A modular simulation method based on Simulink is proposed in this paper. The numerical calculation modules integrated in Simulink are used to build the FSI models of the fluid-conveying pipelines, and the simulation modules library of typical pipe fittings and hydraulic boundaries is obtained by encapsulation. The graphical and modular simulation of FSI problems can be realized by the way of building blocks, which effectively improves the efficiency of simulation analysis. Taking reservoir-pipe-valve (RPV) system as an example, the simulation results show that the calculation results of the method proposed by this paper are in good agreement with those of the method of characteristics (MOC), which proves that the proposed method is correct and feasible, and has good application value for the practice of FSI simulation engineering.