Analysis of the boom structure of concrete pump truck

In recent years, the country has invested more and more in infrastructure construction. During the construction process, the advantages of concrete pump trucks have been reflected. They have fast pouring speed, flexible mobility, good environmental performance, and a high degree of automation. These advantages have made them more and more used in construction and have made them indispensable construction equipment. The boom system is the main component of the concrete pump truck. When pouring, the concrete pump truck mainly relies on the boom system to pump concrete to the material distribution site. The strength and stiffness of the boom system directly affect the service life and product performance of the pump truck. The rationality of the boom structure directly affects the working performance and operation 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 and optimization of the future boom system, and can also promote the improvement of the product performance of the concrete pump truck. Taking the TP38RZ5 concrete pump truck boom as the research object, the structural analysis and fatigue life study are carried out. The geometric model of the concrete pump truck boom is processed in HYPERMESH to obtain the finite element model of the boom structure, and the relevant finite element information is input. After the finite element model of each section of the boom is established, the model is assembled using the ANSYS parametric language APDL, and constraints and loads are applied to the model. In ANSYS, the concrete pump truck boom is calculated for multiple working conditions. The finite element calculation analysis types include static calculation, nonlinear static calculation, modal calculation, and fatigue life calculation.

The static calculation results are analyzed, focusing on the stress distribution of each section of the boom under the maximum stress condition, so as to know the stress concentration area and design weak links of the boom structure, and geometric nonlinear static calculation is performed for dangerous conditions to provide certain reference data for the optimization and improvement of the boom system. Modal analysis of the boom system can obtain the natural frequency and vibration mode of the boom structure under dangerous conditions, and can also provide corresponding theoretical data for improving boom vibration and avoiding resonance. The study of the fatigue life of the boom focuses on the change of fatigue life under the premise of changing the strength of the boom structure. Jiuhe Heavy Industry conducted a strain test experiment on the boom structure and used a dynamic tester and a resistance strain gauge to perform stress and strain tests on the boom structure. The test results are sorted out and compared with the finite element calculation and analysis results, so as to obtain the relative deviation and absolute deviation between the finite element analysis calculation value and the experimental test value, and on this basis, the accuracy of the finite element calculation results is verified.

In summary, Jiuhe has modeled and analyzed the concrete pump truck boom structure and 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 results can provide a basis and reference for future improved designs, thereby improving the overall performance of the concrete pump truck boom structure.