| Aerial work platform is the special vehicle, which is used to transport operators and working equipment to the hope height to work. It should have higher reliability, stability and security. In this paper, based on the modern design concept and method of virtual prototype to the GTBZ21 telescopic boom aerial work platform leveling mechanism, the method of physical prototype modeling and virtual prototype simulation and analysis of the operating mechanism is discussed. The paper established the dynamic model of the working mechanism, simulation and structural optimization. The suggestion is given on how to improve the structure.The major research is as follows:(1) According to the typical working conditions of the aerial work platform working mechanism, the paper designs a feasible experimental scheme, tests out the displacement of luffing cylinder and upper and lower balance cylinder in the typical operating conditions, receives a large number of experimental data and analyzes treatment, which is the necessary preparation of establishing the dynamic model of the aerial work platform working mechanism, simulation and analysis.(2) The paper establishes the dynamic model of the aerial work platform working mechanism by using Pro / E and ADAMS, and its simulation analysis. Through analyzing and comparing of the dynamic model simulation results and experimental test data, the paper founds the upper balance cylinder of leveling mechanism exist hysteresis.(3) The paper combines hydraulic model and dynamic model of the leveling mechanism, establishes the system-wide simulation model of the aerial work platform leveling mechanism, and realizes co-simulation by using AMESim and ADAMS.(4) The optimization goal is that the absolute value of the maximum angle between the bottom of the work platform and the ground is minimized. The optimization of the aerial work platform leveling mechanism is to obtain the best results, which provides a reliable basis for the business improving design. |
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