Dynamic Simulation And Optimized Design Of Working Device Of Telescopic Boom Aerial Working Platform

The subject derives from "Technology and Industrialization of Installation andMaintenance Construction Equipment in Huge Space"(Project Number:2008BAJ09B06),which is supported by National Key Technology R&D Program During the11thFive-yearPlan Period. According to mechanical design theory and engineering mechanics knowledge,the3D model, Dynamic simulation, Finite element analysis and Optimization design of PT25Aerial Working Platform are completed by using Pro/E, ADAMS,ANSYS. The results of thisstudy provide a reliable theoretical reference for improvement design and test work.The main research work includes the following several points:(1) The three-dimensional model of working device. Based on the original design, theparametic model is established. Then the simulation model is generated by using the specialinterface program Mech/Pro2005between Pro/E and ADAMS.(2) The dynamic simulation of working device. According to actual motional behaviorand related design parameters of the platform, driving functions are established. After that, thevariation curves of working height, working range, forces loaded on main components andkey joints are obtained by the dynamic simulation. The simulation results indicate that theoperation range can completely meet the design requirements, the mechanics properties of theplatform is reasonable.(3) The finite element analysis of working device. The finite element models of rotarytable, telescopic boom, arm and basket are established in ANSYS. Taking the simulationresults as load condition, the stress and deformation are calculated. The results show that thesafety factors of all components meet the regulation of GB/T9465-2008, all components haveenough stiffness and strength. In addition, the transient dynamic response analysis of thetelescopic boom is also completed and the dynamic load coefficient is obtained finally.(4) The optimization design of working device. Taking the luffing mechanism jointlocation parameters as design variable, the stress of dangerous section as objective function,the mathematical model of optimization design is established. The optimal calculation iscarried out by the use of MATLAB and accordingly reasonable results of optimum design are obtained. Based on finite element results, with main arm section parameters as design variable,the total volume as objective function, the optimization program is achieved by APDLlanguage. After that, the optimal calculation is conducted and the best section parameters areobtained, which reduced the weight of telescopic boom effectively.Based on the above research work, a new research procedure that includesthree-dimensional modeling, dynamic simulation, finite element analysis and optimizationdesign is put forward, which can significantly improve the efficiency of the research work.This procedure plays an important promoting role in the process of lightweight,energy-conservation, industrialization of the aerial working platform, and it also providesreference for the development of other major equipments.