基于CFD的起重机机械臂屈曲稳定性分析
Analysis of Buckling Stability of Lifting Machinery Arm Based on CFD
崔锡舰1
作者信息
- 1. 武汉建筑材料工业设计研究院有限公司,武汉 430074
- 折叠
摘要
首先建立起重机机械臂结构的有限元模型,并将载荷施加到模型节点;其次运用计算流体动力学(Computational Fluid Dynamics,CFD)模拟实际流体情况,计算风载荷分布,通过气流模拟简化模型;最后进行起重机机械臂的屈曲稳定性分析.在结构性屈曲分析中,所有试件的屈曲载荷值均处于304～574 kN,在动态允许的最大起升载荷范围内;在非线性屈曲分析中,最大应力值为 113.5 MPa,最小应力值为-2.0 MPa;在线性屈曲分析中,当载荷达到80 kN时,起重机机械臂的位移达到最大,此时机械臂已接近其极限承载能力.通过屈曲稳定性分析,得出起重机机械臂具有较为稳定的特性的结论.
Abstract
Firstly,the finite element model of the crane arm structure is established,and the load is applied to the model node.Secondly,the Computational Fluid Dynamics(CFD)is used to simulate the actual fluid situation,calculate the wind load distribution,and simplify the model by airflow simulation.Finally,the buckling stability of the crane arm is analyzed.In the structural buckling analysis,the buckling load values of all specimens are in the range of 304～574 kN,which is within the dynamic maximum allowable lifting load range.In nonlinear buckling analysis,the maximum stress value is 113.5 MPa and the minimum stress value is-2.0 MPa.In linear buckling analysis,when the load reaches 80 kN,the displacement of the crane's mechanical arm reaches the maximum,and the mechanical arm is close to its ultimate bearing capacity.Through the analysis of buckling stability,it is concluded that the crane arm has relatively stable characteristics.
关键词
计算流体动力学(CFD)/起重机/机械臂/稳定性分析Key words
Computational Fluid Dynamics(CFD)/crane/mechanical arm/stability analysis引用本文复制引用
出版年
2024
NETL
NSTL
万方数据