设备闸门起吊支架的极限载荷特性研究

Research of Ultimate Load Characteristics of Hoisting Structure Carrier for Equipment Hatch

设备闸门起吊支架失稳发生在恒载荷和可变载荷共同作用的情况下,其极限承载力计算结果的准确性对设备闸门设计性能有重要影响。工程计算中原有不区分载荷类型直接求解特征值的计算方法导致结果过度保守。本文在原算法采用有限元分析软件ANSYS进行屈曲分析的基础上,将不应被特征值放大的载荷加以区别,将特征值作为目标函数,经优化迭代求得合理极限载荷,并在迭代过程中引入修正系数以加快收敛速度。通过非线性分析验证了改进后工程计算方法的准确性,找到了一种适用于工程计算的设备闸门起吊支架极限载荷计算方法。

Instability of the equipment hatch’s hoisting structure carrier occurs under the combined action of permanent and variable loads,and the accuracy of the ultimate load calculation results has an important influence on the design performance of equipment hatch.In engineering calculations,the traditional algorithm of directly solving eigenvalues without distinguishing load types resulted in overly conservative results.In this paper,on the basis of the original algorithm using ANSYS for buckling analysis,the loads that should not be amplified by the eigenvalues are distinguished.The eigenvalues are taken as the objective function,the reasonable ultimate loads are obtained through optimization iteration,and the correction coefficient is introduced in the iterative process to speed up the convergence.The accuracy of the improved engineering calculation method was verified through nonlinear analysis,and a suitable ultimate load algorithm for equipment hatch’s hoisting structure carrier was found for engineering calculations.