Research On The Topology Optimization For The Boom Structure Of Concrete Placing Boom

In recent years,concrete placing booms have been used more and more in construction,especially in high-rise buildings.Concrete placing booms have the advantages of accurate fabric,wide range,high efficiency and low cost.At present,the domestic production and manufacturing technology of concrete placing booms has been mature,but with the increase of buildings,both the placing range of the placing boom and the performance of the boom of the placing boom have put forward higher performance requirements.The placing boom mainly relies on the boom for distributing operations.When the number of booms increases,the weight of the placing boom also increases.In order to reduce the load of the boom in the working process,the boom structure of the concrete placing boom gradually tends to develop in the direction of light weight and new materials,but because the boom is too light,it will cause slight vibration during work and reduce the use safety performance.In recent years,how to realize the structural optimization of the boom of the placing boom while ensuring the performance of the boom has been a hot research topic.In order to realize the reasonable distribution of concrete placing boom structure,this paper takes HG35A-4Z multi-axis super-long arm concrete placing boom as the research object,and carries out topology optimization analysis on the concrete placing boom structure.First,introduce the structure type of the boom system,analyze the load situation of the boom system,and then use Pro/E software to establish a 3D solid model of the boom,and establish an ADAMS dynamic model based on the 3D model of the boom,and adjust the hinge points of the boom Parameters are optimized.Combined with the dynamic simulation analysis of the boom,a reasonable distribution position of the hinge points is obtained.Secondly,simplify the structure of the boom model,define the simplified model type and material properties,import the boom model into Hyper Mesh for preprocessing and meshing,and use ANSYS software to do post-processing for the three working conditions of the five-section boom and six-section boom,and calculate the static strength of the boom.Then,using the boom web and cover as the design domain,the boom strength as the constraint condition,the boom volume fraction as the design variable,and the minimum boom weight as the objective function,run the Opti Struct solver for the pre-processed boom The model is structurally optimized,and the boom structure is adjusted based on the optimization results and design requirements.The weight of the main structure of the boom is reduced by about 18.01 kg.Finally,stress tests were carried out on the three working conditions of the boom in accordance with the requirements of national standards.The test results are basically consistent with the theoretical simulation results.The strength and stiffness of the boom meet the requirements of the working conditions,indicating the reliability of the finite element simulation results.