个人信息Personal Information
教授
博士生导师
硕士生导师
性别:男
毕业院校:吉林工业大学
学位:博士
所在单位:力学与航空航天学院
学科:动力学与控制. 工程力学
办公地点:工程力学系402
联系方式:Tel: 133-8788-8098
电子邮箱:zhaohuiq@dlut.edu.cn
Geometrical nonlinear and stability analysis for slender frame structures of crawler cranes
点击次数:
论文类型:期刊论文
发表时间:2015-01-15
发表刊物:ENGINEERING STRUCTURES
收录刊物:SCIE、EI
卷号:83
页面范围:209-222
ISSN号:0141-0296
关键字:Crawler crane; Slender frame structure; Geometrical nonlinear stability; Co-rotational substructure element formulation; Static condensation method; Movable boundary; Tangent stiffness matrix
摘要:The geometrical nonlinear and stability analysis for slender frame structures of crawler cranes is investigated in this paper. Taking each lattice-boom section as a super element, the slender frame structures are divided into several substructures and an element-independent co-rotational substructure element is formulated based on the co-rotational method. Owing to the small local nodal displacements and the reinforced end sections of substructures, the degrees of freedom of the internal and boundary nodes can be related to the motions of the two end sections, which results in that each substructure is regarded as a generalized 3D two-node beam element. The generalized internal nodal and gravity forces for super elements as well as the accurate tangential stiffness matrices are formulated. In consideration of movable boundaries of the lattice-boom structures, the additional external nodal forces and their derivatives on the structural and mechanical displacements are given for the residual force equations. After these preparations, a new methodology for determining the first critical load of crawler crane lattice-boom structures is presented, based on solving the governing equations in rate form and combining the instability criterion. At last, a cantilever beam, a space slender frame structure and a certain type of crawler crane with lattice-boom structures are presented respectively, which prove the validity and rationality of the analytical procedure. (C) 2014 Elsevier Ltd. All rights reserved.