Study on Dynamic Features of Leg Applied to Hydraulic Powered Support Under Bumping Load

Abstract：According to the actual performances of the leg operation in the powered support, a dynamic features analysis model of the leg in the powered support was established under the impact load role. The finite element and smooth grains fluid dynamics method were applied to solve the fluid-solid coupling, high fluid deformation and other problems of the leg in the powered support. The dynamic responses numerical simulation of the leg under the impact load role was realized. The cylinder stress distribution of the leg, the max recession value of the piston and the fluid pressure field distribution under the impact load were obtained, including the max impact force and other key technical parameters of the full impact process to the foundation. The solid and fluid spring coupling theory and the energy method were ap- plied to derive the equivalent rigidity of the leg solid and fluid coupling system and the impact dynamic load parameters of the leg. Thus theoretically, the dynamic features of the powered support leg under the impact load role and the max impact force to the foundation were analyzed. In comparison with the theoretic analysis results and the numerical simulation results, there was a consistency within the error scope. The study results could provide related reference data to the development of the anti impact performances test device of the powered support leg.