telescopic boom of truck crane

 

LI Run, JI Aimin, HUANG Xinlei, WANG Minglong, JING Zhimin

(College of Mechanical and Electronic Engineering, Hohai University, Changzhou 213022, China)

 

Abstract: Aiming at the problem of the crosssectional shape of the truck crane boom which can improve the overall stability,various crosssectional shapes of the telescopic boom truck cranes were studied and summarized, a nonuniform rational Bspline (NURBS) curve theory was applied to construct a systematic approach telescopic crosssectional shape of the curve,under this a large arc over would be covered, when the crane works tremors were reduced ,the stress concentration was reduced and stability was improved .At the same time,for the model to simplify the mechanical telescopic arm, its easy to be used ANSYS finite element analysis software. And on this basis, using ANSYS software itself Parametric Design Language (APDL language) as a tool to carry out its overall modeling,including solid modeling(the basic arm and the arm as an example), meshing, block processing and loading and constraint handling.Through finite element analysis of the extension and contraction strength under the two conditions of the curved section illustrates the rationality of telescopic boom.The results indicate that this method can reduce the stress concentration and improve the force,better solve the curved boom crane overall stability problems.

Key words: nonuniform rational Bspline(NURBS); crane telescopic boom; APDL language; parametric design