| Hydraulic support is the key equipment of the synthetically mechanized coal mining, the dynamic performance impacts on the reliability and safety of the whole mechanized working face. By co-simulation with ADAMS (multi-body system dynamics simulation software) and AMEsim (hydraulic system simulation software), this paper effectively analyses the hydraulic support's overall dynamic performance and does a good solution to the problem that the dynamic model and the hydraulic system model are difficult to link.First actual measurement on the size of the main components of hydraulic support, establishing 3d digitizing model of the hydraulic support by the 3d modeling software Pro/E, next using the interface software MECH/Pro to import the 3d model to ADAMS, according to the relationship between the parts of the motion exerts restriction and the driver on the model. Then analyzing the working principle of hydraulic system, detailed describes the type of impact loading which the hydraulic support withstands, priority introducing how to use AMESim/HCD module builds stents pillar model, hydraulic control check valve model, safety valve model and the whole legs hydraulic system model then sets parameter for them, next simulates and checks the model of leg hydraulic system accuracy. Finally combine mechanical structure model with hydraulic system model to co-simulate by setting.Through the analysis of the co-simulation results: (1) During the raising leg stage and early raising leg stage, when the pump pressure constants, increasing the flow can short the time of rising leg. When the flow constants, rising the legs when subarachnoid pressure of the column reached relief valve pressure, the higher pressure relief valve which is adjusted, the longer time which rising the legs needs, early support force will larger. Comparing the pump pressure is constant,increasing the flow with the flow is constant,adjusting the pump pressure, the pump pressure is constant, increasing the flow has greater impact on rising legs and early support force. (2) During the dropping legs stage, the A control port diameter of hydraulic operated check valves changes will cause oscillation of the valve spool, this causes the hydraulic shock, resulting in fluctuating of the leg displacement curve, affecting the stability of hydraulic support during dropping legs stage, through the simulation to find a suitable diameter to minimize the pillar displacement volatility. (3) In the overflow bearing stage, through increasing the relief valve spring stiffness, doesn't affect its open sensitivity premise, can reduce vibration of the valve spool, thus reducing hydraulic shock, making the dynamic overshoot of pressure control increasing and the volatility of top beam trajectory reduce, increasing the safety of the work face. The innovative point of this paper mainly is the first time brings the co-simulation method to study the whole dynamic characteristics of hydraulic support, the results proves co-simulation is an effective method to study the hydraulic support dynamic characteristics.
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