Finite Element Analysis And Test Verification On The Boom Of Truck-mounted Concrete Pump

Truck-mounted concrete pump is a kind of construction equipment developingover the latest decades; it can carry out the placement of concrete in a quick andefficient way, for this reason it is more and more widely used in modern constructionand is playing an increasingly important role. As one of the most importantcomponents of truck-mounted concrete pump, the boom acts as a key role toconveying the concrete to the target place. The length of the boom decides the placingheight of the truck-mounted concrete pump,and the placing height is one of the mostperformance. All the manufactures of the truck-mounted concrete pump long for thelighter boom, the longer boom than the others. There are the all kinds of the boomgesture when the truck-mounted concrete pump is working, and the boom is laying onthe building. So we must pay attention to the structural safety when we design thelight weighting boom.The thesis first gives a comprehensive overview of the domestic and foreignresearches on truck-mounted concrete pump and its future developing tendency, basedon which the boom design and the light weighting boom of truck-mounted concretepump is emphasized and deeply studied. The study elaborates on the boom design, itsoptimization methods, finite element analysis methods,the problem on static structuralintensity and test verification methods, and the key points contained in this paper are:The3D boom model is built with the TOP-DOWN design method of thesoftware Pro/E. Realize the parameters of the boom structure design, modified andcopy quickly.The stress suffered by the boom when working is discussed in details, and anoptimization method of the boom hinge point is introduced, the optimization processof the boom hinge point is then studied by use of the software ADAMS.By thehydraulic cylinder minimizing force as a hinge point optimization target we get to thehydraulic cylinder and a rod of the lightest in weight. The method of acquiring extreme condition for the boom at work is introducedand, by means of the software ADAMS, the process for acquiring the boundarycondition of the boom section is discussed detailedly.Based on the finite elements of the boom obtained from ADAMS, the boundarycondition is analyzed and the author then puts forwards a finite element analysismethod for the boom to study the unit, boundary condition, grid requirement,calculating basis, etc. Each boom section is treated by the software HyperMesh and isafter-treated by the software ANSYS, the analysis result of each boom section by themethod of finite element is derived respectively. With all designed requirementssatisfied, the detailed design of the boom is carried out in attempts to make it suitablefor all extreme working conditions.In accordance with the national standards, The stress test is conducted at40positions of the boom and rod in accordance with the national standards. Bycomparing the test result with that gained from finite element analysis, it shows thatthe theoretical result is much in consistence with that derived from the stress test, andthe stress values are all less than the material permits, thus the boom strength meetsthe design requirements.Through research, the purpose of this paper is to summarize a set of completeboom structure design calculation process and method, to guide the subsequent designof the truck-mounted concrete pump.