The Strength Analysis And Optimization For The Boom Of YTQU80Hydraulic Crawler-type Crane With Finite-element Method

Crawler crane is one of the commonly used mobile cranes. With the characteristics ofpowerful lifting capacity, small grounding, diversified arm frame combination and capabilityof walking with load, it has been used widely in the field of water conservancy, hydropower,petrochemical industry, port loading and unloading, road and bridge construction, civilconstruction, etc. Arm frame, as the main load-bearing components of crawler crane, itsconstruction is developing towards heavier, higher, softer and better posture. At the same time,large-scale adoption of high strength steel can increase the joint strength and stiffness of armframe, while the problem of its stability is becoming more prominent.Therefore, to the practical situations and current existing problems, based on theassembly drawing and parts drawing of crawler crane, combining the constructional featuresof YTQU80tons crawler crane of our company, this research aims to establishthree-dimensional truss arm model by CATIA3d mapping software. AdoptingHYPWEWORKS software, this paper establishes a finite element model. Using large-scalefinite element analysis software ANSYS structure modeling, according to the arm frame usedin practical work of the most typical combination arm length13meters and31meters for thestatic strength analysis, get the arm frame structure under small deformation and largedeformation, boom the main chord, CHS and knuckle arm up and down the von mises stress,and by means of strain gauge on the arm frame main chord stress test, verify the accuracy offinite element calculation.Through the ANSYS optimization function, the boom boom the main chord and theventral pole optimization design, optimize13meters arm arm frame than the original planafter weight loss of0.16tons,31m arm compared with the original package weight loss of0.318tons, although boom stress increased, but still meet the strength requirements, achievethe goal of the authors "weight loss".Through this task, we formed a set of crawler crane boom system strength analysismethod, and through to the boom of the stress test, verify the accuracy of the finite elementanalysis, the next series of products have important guiding significance.