RESEARCH ON ELASTIC LINE METHOD BASED ON ABSOLUTE NODAL COORDINATE METHOD1)
Fan Jihua*,?, Zhang Dingguo,**,2), Shen Hong?* School of Mechatronics and Power Engineering, Jiangsu University of Science and Technology, Zhangjiagang 215600, Jiangsu China ? Suzhou Institute of Technology, Jiangsu University of Science and Technology, Zhangjiagang 215600, Jiangsu China ** School of Sciences, Nanjing University of Science and Technology, Nanjing 210094, China
Abstract Compared with the floating frame of reference formulation, the absolute nodal coordinate formulation (ANCF) has significant advantages in dealing with the nonlinear large deformation problem of flexible bodies. ANCF defines the nodal co-ordinates in a global co-ordinate system, uses the global slopes instead of angles to define the orientation of the elements, has a constant mass matrix, and does not have the Coriolis centrifugal force. However,the elastic force matrix is a nonlinear term, and the solution will be time consuming and occupied resources. According to this,the elastic line method is introduced for solving the elastic force, the Green-Lagrangian strain tensor is defined on the centerline, the curvature formula is used to define the bending strain, and the torsion angle formula is used to define the torsional strain. At the same time, the finite element method is used to describe the displacement field of the three-dimensional flexible beam, and the constant mass matrix, the generalized stiffness matrix and the generalized force matrix of the beam element are solved, and then the dynamic equations of the element are obtained. The dynamic equations of the three-dimensional beam are obtained by the transformation matrix. Then the differences between the continuum mechanics method and the elastic line method are pointed out theoretically, and the dynamic simulation software is compiled. Finally, the dynamics behaviors of a flexible pendulum and a tracked vehicle are numerical investigated with the continuum mechanics method and the elastic line method. The results show that the elastic line method can effectively improve the calculation efficiency under the premise of ensuring accuracy. Keywords:absolute nodal coordinate formulation;continuum mechanics method;elastic line method;dynamic simulation;tracked vehicle
PDF (1864KB)元数据多维度评价相关文章导出EndNote|Ris|Bibtex收藏本文 本文引用格式 范纪华, 章定国, 谌宏. 基于绝对节点坐标法的弹性线方法研究1). 力学学报[J], 2019, 51(5): 1455-1465 DOI:10.6052/0459-1879-19-076 Fan Jihua, Zhang Dingguo, Shen Hong. RESEARCH ON ELASTIC LINE METHOD BASED ON ABSOLUTE NODAL COORDINATE METHOD1). Chinese Journal of Theoretical and Applied Mechanics[J], 2019, 51(5): 1455-1465 DOI:10.6052/0459-1879-19-076
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