Abstract:This paper developed a hydraulic inerter and elaborated the structure and working principle of hydraulic inerter, for the mechanical properties of traditional mechanical inerter was seriously effected by nonlinear factors. In considering the friction and flow pressure loss, an ideal mathematical model of hydraulic inerter was built according to the hydrodynamic theory, and its mechanical properties was simulated in Matlab/Simulink, the results shows that the mechanical properties of hydraulic inerter can be effected by flywheel inertia, hydraulic motor displacement, actual function area of the oil and return pipe equivalent length. On this basis, the main parameters of the hydraulic inerter was determined. A hydraulic inerter test prototype was fabricated and was thrown into the test of its mechanical properties on numerical control hydraulic servo vibration test bench, the test results and simulation results were basically consistent which indicated that the simulation model was built with high accuracy, this provided important references basis for the design and development of hydraulic inerter.