| Structure Analysis of Locking Mechanism of Gear-Rack Typed Ship-Lift |
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| 作者姓名： | SHI Duanwei WU Qingming ZHANG Zhiqiang |
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| 作者单位： | College of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, Hubei, China |
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| 摘 要： | Contact nonlinear theory was researched. Contact problem was transformed into optimization problem containing Lagrange multiplier, and unsymmetrical stiffness matrix was transformed into symmetrical stiffness matrix. A finite element analysis （FEA） model defining more than 300 contact pairs for long nut-short screw locking mechanism of a large-scale vertical gear-rack typed ship-lift was built. Using augmented Lagrange method and symmetry algorithm of contact element stiffness, the FEA model was analyzed, and the contact stress of contact interfaces and the von Mises stress of key parts were obtained. The results show that the design of the locking mechanism meets the requirement of engineering, and this method is effective for solving large stole nonlinear contact pairs.
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| 关 键 词： | 升船机 锁定机构 有限元 扩展拉格朗日方法 ANSYS 对称算法 |
| 文章编号： | 1007-1202（2006）03-0631-06 |
| 收稿时间： | 2005-10-22 |
Structure analysis of locking mechanism of gear-rack typed ship-lift |
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| SHI Duanwei WU Qingming ZHANG Zhiqiang.Structure Analysis of Locking Mechanism of Gear-Rack Typed Ship-Lift[J].Wuhan University Journal of Natural Sciences,2006,11(3):631-636. |
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| Authors: | Shi Duanwei Wu Qingming Zhang Zhiqiang |
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| Institution: | (1) College of Power and Mechanical Engineering, Wuhan University, 430072 Wuhan Hubei, China |
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| Abstract: | Contact nonlinear theory was researched. Contact problem was transformed into optimization problem containing Lagrange multiplier, and unsymmetrical stiffness matrix was transformed into symmetrical stiffness matrix. A finite element analysis (FEA) model defining more than 300 contact pairs for long nut-short screw locking mechanism of a large-scale vertical gear-rack typed ship-lift was built. Using augmented Lagrange method and symmetry algorithm of contact element stiffness, the FEA model was analyzed, and the contact stress of contact interfaces and the von Mises stress of key parts were obtained. The results show that the design of the locking mechanism meets the requirement of engineering, and this method is effective for solving large scale nonlinear contact pairs. |
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| Keywords: | ship-lift locking mechanism FEA augmented Lagrange method ANSYS symmetry algorithm |
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