Analysis And Lightweight Design Of Structure Of Concrete Pump Truck Pumping System

The century-old foundation began with commercial concrete.The development the construction industry is related to the stability of the foundation of national infrastructure construction,and the manufacturing and development of concrete construction machinery plays a decisive role.The concrete pump truck is a kind of equipment that integrates the concrete pumping system and the boom system for distribution on the vehicle chassis.It has the advantages of strong mobility,high efficiency,diverse pumping functions,time-saving and labor-saving in the development of the construction industry.The hydraulic piston concrete pumping system carried by it has also been widely praised for its advantages in years of practice.With the continuous development of infrastructure construction and the large demand for highquality concrete,people gradually put forward new requirements for the material cost,pumping performance and service time of the concrete pump truck pumping system structure.Therefore,it is of great significance to study the reliability,stability analysis and lightweight design of such structures under pumping conditions as dangerous conditions.This paper takes the pumping system structure of a certain type of concrete pump truck as the research object,and carries out stiffness,strength,buckling stability analysis and lightweight design research on its main structural components.The main research contents and conclusions are as follows:(1)The necessity of carrying out reliability and stability research on such structures are draw out by summarizing the development of pumping system structure and combining the current research status of pumping system structure at home and abroad.According to apply finite element numerical simulation calculation method and structural stress test to carry out structural analysis and lightweight design related research.(2)The composition and working principle of concrete pump truck structure and pumping system structure are analyzed and the establishment of the finite element model of each component are completed by using Hypermesh software and combining with the properties and characteristics of the finite element.(3)The static and buckling analysis of the pumping system structure are based on the pumping condition,and the results of calculation are extracted at the same time.Through the analysis of displacement and stress values obtained from static calculation,it is determined that the structure meets the requirements of rigidity and strength.Based on the buckling calculation method,the concrete conveying cylinder structure is analyzed to ensure that it will not have buckling failure and has stability.(4)The variable density method is used to optimize the topology of the complex hopper rear cover plate structure.The equivalent model of the rear cover plate structure is combined with the load and stress under the pumping condition.With the allowable stress and volume fraction as the constraint conditions and the minimum mass as the objective function,the topology optimization of the hopper rear cover plate structure is carried out by using the optimization module of Hyperworks.At the same time,the optimized model is checked and analyzed,which not only improves the structural material and stress distribution of the rear cover plate,but also reduces the weight by7.2% on the premise of ensuring its reliability.(5)In conclusion,this paper verifies the reliability,stability and safety of the pumping system structure of the concrete pump truck through the finite element analysis and stress test under pumping conditions.On this basis,the structure of the pumping system is optimized,and the result is that the weight of the structure is reduced,the production cost is saved,and the overall performance of the structure is improved.