| At present, the truck-mounted concrete pump is indispensable mechanical equipment of pouring concrete in the jobsite. It is a kind of special vehicles that through the hydraulic system driving the multi-section folding booms to rotate, the booms put transporting pipes in motion at the same time, so that the truck-mounted concrete pump can continuously and evenly pump concrete up to the appointed position of pouring.In this dissertation, as the main research object of boom system, the core component of concrete pump truck, the two models which were rigid and flexible were respectively analyzed by means of kinematics, dynamic simulation based on the theories of multi-body dynamics, parametric analysis and optimization. The positions of hydraulic cylinder hinge which had influence on the force of luffing mechanism were optimized to reduce the maximum stress in the oil cylinder by rigid and flexible model. Then the optimized boom system was made strength analysis, which result was verified combined with dynamic stress test.1. Through the joint application of three kinds of software Pro/E, ANSYS and ADAMS, the rigid model and the rigid and flexible model were established and simulated. Compared with simulation results, it was found that the latter was more suitable to actual operation situation of boom system. So it built a solid foundation for the further analysis of boom system.2. Based on the rigid and flexible mode of boom system, the cylinder stress of luffing mechanism were studied by using optimization module in the ADAMS. The several variables which had higher sensitivity were optimized on the basis of established parametric model, in order to significantly reduce the maximum stress of oil cylinder.3. After the boom system were simulated, the dynamic load, in the simulation time, was outputted to the finite element software to make the strength analysis, then through the dynamic stress test, the results of finite element analysis was verified. |
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