In recent years,the country has invested more and more in infrastructure construction.During the construction process,the advantages of concrete pump trucks are reflected,such as fast pouring speed,flexibility,good environmental performance and high degree of automation.These advantages make it more and more It has been used in building construction and has become an indispensable construction equipment.The boom system is the main component of the concrete pump truck.When the concrete pump truck is pouring,it mainly relies on the boom system to pump the concrete to the placement site.The strength and stiffness of the boom system directly affect the service life of the pump truck and the product performance of the pump truck.The rationality of the boom structure directly affects the working performance and working stability of the concrete pump truck.

　　Therefore,it is very necessary to analyze the strength and stiffness of the boom system.Mastering the change law of the strength and stiffness of the boom can play a certain guiding role in the design,optimization and improvement of the boom system in the future,and can also promote the improvement of the boom system.Product performance of concrete pump trucks.Taking the boom of TP38RZ5 concrete pump truck as the research object,the structure analysis and fatigue life research are carried out.The geometric model of the boom of the concrete pump truck is processed in HYPERMESH,the finite element model of the boom structure is obtained,and the relevant finite element information is input.

　　After the finite element model of each arm is established,the model is assembled using the ANSYS parametric language APDL,and constraints and loads are applied to the model.In ANSYS,the multi-condition calculation of the concrete pump truck boom is carried out.The finite element calculation and analysis types include static calculation,nonlinear static calculation,modal calculation and fatigue life calculation.The static calculation results are analyzed,focusing on observing the stress distribution of each boom under the maximum stress condition,so as to know the stress concentration area and design weakness of the boom structure,and perform geometric nonlinear static calculation for dangerous conditions.,to provide certain reference data for the optimization and improvement of the boom system.

　　The modal analysis of the jib system can obtain the natural frequency and mode shape of the jib structure under dangerous working conditions,and can also provide corresponding theoretical data for improving the jib vibration and avoiding resonance.The research on the fatigue life of the boom focuses on the change of the fatigue life under the premise of changing the strength of the boom structure.Xinrui Heavy Industry conducted a strain test experiment on the boom structure,and used a dynamic tester and a resistance strain gauge to test the stress and strain of the boom structure.The results obtained from the test are sorted out and compared with the results of the finite element calculation and analysis,so as to obtain the relative deviation and absolute deviation between the calculated value of the finite element analysis and the experimental test value.Based on this,the accuracy of the finite element calculation result is verified.sex.

　　To sum up,Xinrui has carried out modeling analysis on the boom structure of the concrete pump truck,carried out strength and stiffness calculations under multiple working conditions,modal analysis,and related research on the influence of strength changes on fatigue life.The finite element results and experimental test results are compared and analyzed to verify the accuracy of the finite element results,and whether the obtained results can provide a basis and reference for future improvement design,thereby improving the overall performance of the concrete pump truck boom structure.

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