超起拉索非保向力作用下伸缩臂几何非线性分析  

Geometric Nonlinear Analysis of Telescopic Boom Under the Action of Pull-Rope Follower Force of Super-Lifting

作　　者：刘士明 刘俊汝 孟丽霞 LIU Shi-ming;LIU Jun-ru;MENG Li-xia(School of Mechanical Engineering,Shenyang Jianzhu University,Liaoning Shenyang 110168,China)

机构地区：[1]沈阳建筑大学机械工程学院,辽宁沈阳110168

出　　处：《机械设计与制造》2021年第5期88-91,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金—大柔度起重机械复杂梁杆结构分析方法研究(51505304);辽宁省自然基金—大型起重机柔性组合臂架系统非线性问题研究及优化分析(2016010638);国家重点研发计划项目—空中自动调姿、寻位就位执行装置承载结构动力特性优化设计研究(2017YFC0703902-03)。

摘　　要：为获得超起拉索非保向力作用下伸缩臂结构几何非线性变形的理论解,将具有超起装置的伸缩臂受力模型等效为弹性支撑条件下的多级伸缩臂模型。基于小变形理论建立空间对称双拉索多级伸缩臂的静力平衡方程,推导计及轴力二阶效应的多级伸缩臂结构臂端挠度的递推表达式。以具有超起装置的伸缩臂结构为例,分析其在轴力、侧向力和弯矩作用下的几何非线性变形,获得任意多级伸缩臂臂端挠度,并与ANSYS仿真结果对比,给出不同弹性支撑刚度的伸缩臂几何非线性变形。分析结果表明:推导的任意多级伸缩臂挠度递推表达式是正确的和合理的,能有效地满足工程实际应用。In order to obtain the theoretical solution of the geometric nonlinear deformation of the telescopic boom structure under the action of pull-rope follower force of the super-lifting,the telescopic arm force model with the super-lifting device is equivalent to the multi-stage telescopic arm model under the elastic support condition.Based on the small deformation theory,the static equilibrium equation of the spatially symmetric double-stayed multi-stage telescopic arm is established,and the recursive expression of the arm end deflection of the multi-stage telescopic arm structure with the second-order effect of the axial force is derived.Taking the telescopic arm structure with super-lifting device as an example,the geometric nonlinear deformation under axial force,lateral force and bending moment are analyzed,and the deflection of the arm end of any multi-stage telescopic arm is obtained,and compared with the ANSYS simulation results.The geometric nonlinear deformation of the telescopic arm with different elastic support stiffness.The results of analysis show that the derived recursive expression of any multi-stage telescopic arm is correct and reasonable,and can effectively meet the practical application of engineering.

关 键 词：超起装置 伸缩臂 几何非线性 非保向力 弹性支撑 

分 类 号：TH16[机械工程—机械制造及自动化] TP213.6[自动化与计算机技术—检测技术与自动化装置]