Instability load analysis of a telescopic boom for an all-terrain crane

IF 1 4区工程技术 Q4 ENGINEERING, MECHANICAL Mechanical Sciences Pub Date : 2022-11-28 DOI:10.5194/ms-13-991-2022

Jinshuai Xu, Yingpeng Zhuo, Zhaohui Qi, G. Wang, T. Zhao, Tianyu Wang

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引用次数: 1

Abstract

Abstract. The instability load for the telescopic boom of an all-terrain crane is investigated in this paper. Combined with structural characteristics of the telescopic boom, each boom section is divided into several substructures, and the fixed-body coordinate system of each substructure is established based on the co-rotational method. A 3D Euler–Bernoulli eccentric beam element of the telescopic boom is derived. On the premise of considering the discretization of gravity and wind load, internal degrees of freedom of the substructure are condensed to the boundary nodes, forming a geometrical nonlinear super element. According to the nesting mode of the telescopic boom, a constraint way is established. The unstressed original length of the guy rope is calculated with a given preload so as to establish the equilibrium equations of the boom system with the external force of the guy rope and the corresponding tangent stiffness matrix. Regarding the above work, a new method for calculating the structural equilibrium path and instability load of telescopic boom structure is presented by solving the governing equations in a differential form. Finally, the method is validated by examples with different features.

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全地形起重机伸缩臂的失稳载荷分析

摘要本文研究了全地形起重机伸缩臂的失稳载荷。结合伸缩臂的结构特点，将每个臂段划分为多个子结构，并基于共旋转法建立了每个子结构的固定体坐标系。推导了伸缩臂的三维欧拉-伯努利偏心梁单元。在考虑重力和风荷载离散化的前提下，将子结构的内部自由度凝聚到边界节点上，形成几何非线性超单元。根据伸缩臂的嵌套方式，建立了约束方式。在给定预载荷的情况下，计算拉索的无应力原始长度，从而建立起臂系统与拉索外力的平衡方程和相应的切线刚度矩阵。针对上述工作，通过微分形式求解控制方程，提出了一种计算伸缩臂结构平衡路径和失稳载荷的新方法。最后，通过不同特征的实例验证了该方法的有效性。

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来源期刊

Mechanical Sciences ENGINEERING, MECHANICAL-

CiteScore

2.20

自引率

7.10%

发文量

审稿时长

29 weeks

期刊介绍： The journal Mechanical Sciences (MS) is an international forum for the dissemination of original contributions in the field of theoretical and applied mechanics. Its main ambition is to provide a platform for young researchers to build up a portfolio of high-quality peer-reviewed journal articles. To this end we employ an open-access publication model with moderate page charges, aiming for fast publication and great citation opportunities. A large board of reputable editors makes this possible. The journal will also publish special issues dealing with the current state of the art and future research directions in mechanical sciences. While in-depth research articles are preferred, review articles and short communications will also be considered. We intend and believe to provide a means of publication which complements established journals in the field.