Stress Analysis And Light Weight Research Of Truss Boom

With the development of national economy and the rapid growth of construction engineering quantity,hydraulic crawler crane has been widely used.As the main lifting component,nowadays the crane boom’s frame layout has professional,soft,large-scale and simplified development trend.The large number of high-strength material’s use has made the structure strength increase significantly.But the problems of the truss boom’s strength and lightweight have become increasingly prominent.This paper considers the hoisting problems in the actual use and the situation encountered in the real work.At the same time,This paper combines with hydraulic crawler crane overall structure.The maximum lifting weight of this crane is 100 tons.The Pro/E and the finite element analysis software ANSYS have been used to establish the three-dimensional model and the finite element model of truss boom with the overall layout diagram and component diagram of the crane’s truss boom by the company supplied.The most typical arm length combinations of the truss boom have been chosen which is used in the real work:17 meters and 53 meters,and the static stress analysis of this two arm length has been run.Through the analysis of static stress,the von-Mises stress of the main chords has been got,the ventral rods and the truss boom’s sheet in the truss boom’s construction under the different loads.In this way,this paper finds that the maximum stress of the truss boom’s components is still less than the allowable stress of the corresponding component materials.Using the electrometric method,this paper has done a stress test of truss boom’s corresponding working condition and made the measurement of truss boom’s static stress response.Adopting DH3819D static data collection and disposal system,the stress test data has been collected and processed,and the experimental stress of the corresponding points has been got.Through the comparison of experimental stress and calculated stress,this paper has verified the correctness of the numerical results of finite element analysis and the test results.Using the topology optimization module in ANSYS Workbench,the topology optimization of truss boom’s arm head has been done.And through image processing,calculating the results of topology optimization.Those results have made the model weight be reduced by 31.18kg.It achieves the purpose to reduce the use of materials and the cost.