塔式起重机塔身全载荷工况非线性屈曲分析

Full-load non-linear buckling analysis for tower crane

塔式起重机塔身属高耸杆系结构,其屈曲失稳导致的工作垮塌失效颇为常见。针对目前较多研究仅考虑单一载荷作用下塔身失稳的情况,在考虑塔身受到的吊重与其倾翻力矩、配重垂直载荷、风载荷、离心力、回转阻力与水平惯性力等多种载荷共同作用下,通过特征值屈曲与非线性屈曲有限元分析,得到吊重在臂架最大工作幅度时的塔身屈曲上限载荷、杆件受力状况及塔身稳定性收敛图,从而为塔身结构设计提供依据。

Due to towering trussing structure of the tower crane, operating collapse failure arising from buckling instability is very common to occur. Aiming at the current situation where most of researches focus on only the tower body instability under single load action, with consideration of combined actions of multiple loads such as hoisting weight borne by the crane, overturning moment, bob-weight vertical load, wind load, centrifugal force, steering resistance and horizontal inertial force, etc. , the buckling upper limit load, trussing force condition, and stability convergence map are figured out with the boom at the maximum working range through the finite element analysis for eigenvalue buckling and nonlinear buckling, hence to provide reference for structural design of the crane body.