| In the modernization of towns,truck cranes are playing an increasingly important role.The single cylinder impeller cranes are typical representatives of the crane machinery family,which not only have good lifting performance,but also have the characteristics of convenient operation and strong workability.The telescopic boom is one of the most important force-bearing component of the single cylinder impeller cranes.Its structural strength is critical to the safety and reliability of the crane during working operation.In this paper,the telescopic boom with single cylinder pinning system for crane is taken as the research object.Based on the APDL language of ANSYS software,the parameterized finite element model of the telescopic arm is established using the bottom-up modeling method.According to the actual working conditions of the telescopic boom,theoretical analysis and finite element analysis are performed.The results of the finite element analysis are consistent with the theoretical calculation results.Applying ANSYS optimization algorithm,taking the geometric parameters of the telescopic arm section as the design variables,taking the strength and maximum displacement of the arm as the constraint conditions,and reducing the weight of the telescopic arm as the objective function,an optimized model of the telescopic boom of the single cylinder bolt crane is established.The overall weight of the telescopic arm was finally reduced by 7.8%.Then,vibration modal analysis was performed on the typical operating conditions of the telescopic boom,and the natural frequency and mode shape of the first six orders of the telescopic boom were obtained.Finally,the buckling analysis is performed on the typical operating conditions of the telescopic boom.The buckling critical load of the telescopic boom is greater than the maximum hoisting load of the telescopic boom,so the telescopic boom will not be buckling deformed. |
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