| 基于模态分析的液压挖掘机工作装置动态优化设计 |
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| 引用本文： | 李发宗,童水光,王相兵.基于模态分析的液压挖掘机工作装置动态优化设计[J].农业机械学报,2014,45(4):28-36. |
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| 作者姓名： | 李发宗 童水光 王相兵 |
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| 作者单位： | 浙江大学;宁波工程学院;浙江大学;浙江大学 |
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| 基金项目： | 浙江省重大科技专项重大科技资助项目(2007C01006) |
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| 摘 要： | 建立了液压挖掘机工作装置的结构有限元模型,通过对该有限元模型进行自由模态分析,得到工作装置的各阶模态频率和模态特性,确定影响液压挖掘机工作装置动态性能的关键模态频率,并以此作为优化目标,对主要结构参数进行灵敏度分析,以确定工作装置动态优化的设计变量。以工作装置几何约束、性能约束等为约束条件,采用扩展拉格朗日乘子法进行动态优化设计。实例分析表明,该动态优化方法,提高了工作装置结构的刚度,降低了结构的变形,改善了工作装置动态工作性能与结构稳定性。
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| 关 键 词： | 液压挖掘机 模态分析 工作装置 结构动态优化设计 扩展拉格朗日乘子法 |
| 收稿时间： | 2013/10/21 0:00:00 |
Dynamic Optimization Design for Working Device of Hydraulic Excavator Based on Modal Analysis |
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| Li Fazong,Tong Shuiguang and Wang Xiangbing.Dynamic Optimization Design for Working Device of Hydraulic Excavator Based on Modal Analysis[J].Transactions of the Chinese Society of Agricultural Machinery,2014,45(4):28-36. |
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| Authors: | Li Fazong Tong Shuiguang and Wang Xiangbing |
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| Institution: | ,Ningbo University of Technology;Zhejiang University;Zhejiang University |
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| Abstract: | The structure finite element model for the working device of hydraulic excavator was established, and each order modal frequency and modal characteristics of working device were gotten by analyzing the free mode of the finite element model. The key modal frequency was determined, which influenced the dynamic performance of the working device, and taking the key modal frequency as the optimization goal the sensitivity analysis was conducted for the main structural parameters to set up the dynamic optimum design variables of working device. Taking the geometric constraints and performance constraints of work device as constraint conditions, the dynamic optimization design was conducted by using augmented Lagrangian method. The instance analysis showed that the structure stiffness was improved, and the structure deformation was reduced. And the dynamic working performance and the structure stability reliability for the working device were improved. |
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| Keywords: | Hydraulic excavator Modal analysis Working device Structure dynamic optimization design Augmented Lagrangian method |
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