运营铁路移动防护棚架吊装数值模拟分析

Numerical Simulation Analysis of Mobile Protective Scaffolding Hoisting in Operating Railway

以某运营铁路移动防护棚架吊装施工为例,将其吊装分解为棚架提升、棚架旋转、棚架下降3个基本过程,并将每个基本过程划分为加速、匀速、减速3个棚架吊装阶段;考虑风压作用,基于ANSYS数值模拟,分析棚架结构在吊装过程中的强度和刚度。计算结果表明,在6级风压作用下,以线加速度100mm/s^(2)进行棚架吊装提升或下降,以角加速度0.01rad/s^(2)进行棚架吊装旋转,棚架结构均安全。

Taking the hoisting construction of a mobile protective scaffolding of an operating railway as an example,the hoisting is decomposed into three basic processes of scaffold lifting,rotation and lowering,and every basic process is divided into three scaffolding hoisting stages of acceleration,uniform speed and deceleration.Considering the effect of wind pressure,based on ANSYS numerical simulation,the strength and stiffness of the scaffolding structure during the hoisting process are analyzed.The calculation results show that under the action of 6-level wind pressure,the scaffold is hoisted or lowered with a linear acceleration of 100mm/s^(2),and the scaffold is hoisted and rotated with an angular acceleration of 0.01rad/s^(2),and the scaffold structure is safe.