Structural Analysis And Optimization Of 47m Concrete Pump Truck

Recently,with the vigorous and rapid development of construction machinery,especially the rapid rise of China’s construction industry,the demand for concrete pump trucks in engineering has increased with the development requirements.Concrete pump truck as a special vehicle,its main role is through the pipeline,the use of pressure,will be pre-mixed concrete transport to designated location.Concrete pump has attracted attention in the construction industry because its unique inherent advantages,which also makes it one of the most irreplaceable existence in this field.This makes more domestic manufacturers began to produce and manufacture concrete pump truck.The weight of concrete pump truck is carried by getting off,so there are high requirements for its anti-overturning property and mechanical properties such as strength and rigidity.To ensure the strength and stiffness of their products meet requirements,many manufacturers are pulling out of trucks There will be a high design margin in the design of the product,which causes the product to still have a lot of room for optimization.In order to improve the market competitiveness of products,it is necessary to carry out lightweight design for the getting off link of concrete pump truck.The research process of this paper is as follows:（1）The first chapter introduces the main structure of the concrete pump truck,briefly introduces the development of the concrete pump truck at home and abroad,and introduces the background,content and significance of this research.（2）The Pro/E 3D model provided by the factory was pre-processed by finite element calculation.It includes finite element model creation,mass point application,finite element model assembly and so on.At the same time,the constraint conditions and stress conditions of concrete pump truck are also introduced in this chapter.（3）The calculation of all working conditions is carried out by choosing to get on the vehicle when the boom is in a horizontal state.Firstly,this paper verifies whether the pump truck overturns and whether the strength and stiffness meet the requirements through finite element calculation.Then,the voltage distribution and displacement distribution of each component under the corresponding dangerous working conditions are obtained by using the calculated results,and the dangerous working conditions and dangerous points of each component are found.At the same time,the overturning property of the vehicle was tested according to the reaction force of the outrigger and the amount of leg lift obtained from the calculation results of the whole working condition.（4）Due to the preciseness of research,we need to verify the above finite element calculation results through strain test.Strain testing is performed on the jib rotated 360°.We need to extract the maximum stress conditions of the underframe assembly structure and the front and rear legs respectively for testing,corresponding to the boom rotation of 225 °,240 ° and 315 °.Therefore,the actual strain values obtained from the test under these three working conditions are compared with the calculated values calculated in our finite element method.（5）It can be known that the optimization design calculation of the plate thickness needs to be carried out.Through effective communication with the design staff in the factory,we identified some parts boards for the complete vehicle that could be optimized.Using zero-order iterative optimization,the iterative optimization results of the base,front and back legs were obtained,and the optimal solution was selected to modify the plate thickness.According to the optimization results,it can be seen that this lightweight design achieved a total weight loss goal of 9.7%.After checking and verifying the optimization scheme,we get that our optimization scheme is feasible.Through the above series of descriptions,it can be seen that this article has verified the stiffness and overturning strength mechanical properties of the disassembly,assembly system meet the requirements through a series of calculations and analyses,and provides an optimized calculation for the disassembly and assembly model.The research method of this paper can be used for reference in other similar studies.