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基于模態(tài)分析的液壓挖掘機(jī)工作裝置動(dòng)態(tài)優(yōu)化設(shè)計(jì)
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浙江省重大科技專項(xiàng)重大科技資助項(xiàng)目(2007C01006)


Dynamic Optimization Design for Working Device of Hydraulic Excavator Based on Modal Analysis
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    摘要:

    建立了液壓挖掘機(jī)工作裝置的結(jié)構(gòu)有限元模型，通過對(duì)該有限元模型進(jìn)行自由模態(tài)分析，得到工作裝置的各階模態(tài)頻率和模態(tài)特性，確定影響液壓挖掘機(jī)工作裝置動(dòng)態(tài)性能的關(guān)鍵模態(tài)頻率，并以此作為優(yōu)化目標(biāo)，對(duì)主要結(jié)構(gòu)參數(shù)進(jìn)行靈敏度分析，以確定工作裝置動(dòng)態(tài)優(yōu)化的設(shè)計(jì)變量。以工作裝置幾何約束、性能約束等為約束條件，采用擴(kuò)展拉格朗日乘子法進(jìn)行動(dòng)態(tài)優(yōu)化設(shè)計(jì)。實(shí)例分析表明，該動(dòng)態(tài)優(yōu)化方法，提高了工作裝置結(jié)構(gòu)的剛度，降低了結(jié)構(gòu)的變形，改善了工作裝置動(dòng)態(tài)工作性能與結(jié)構(gòu)穩(wěn)定性。

    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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李發(fā)宗,童水光,王相兵.基于模態(tài)分析的液壓挖掘機(jī)工作裝置動(dòng)態(tài)優(yōu)化設(shè)計(jì)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2014,45(4):28-36. Li Fazong, Tong Shuiguang, Wang Xiangbing. Dynamic Optimization Design for Working Device of Hydraulic Excavator Based on Modal Analysis[J]. Transactions of the Chinese Society for Agricultural Machinery,2014,45(4):28-36.

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  • 收稿日期:2013-10-21
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  • 在線發(fā)布日期: 2014-04-10
  • 出版日期: 2014-04-10