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滴灌三角形迷宮滴頭水力性能穩(wěn)健性分析
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國(guó)家自然科學(xué)基金資助項(xiàng)目(51175262);教育部新世紀(jì)優(yōu)秀人才支持計(jì)劃資助項(xiàng)目(NCET—08);安徽省高等學(xué)校優(yōu)秀青年基金資助項(xiàng)目(2010SQRL117)


Hydraulic Performance Robustness Analysis for Drip Irrigation Triangle Labyrinth Channel of Emitter
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    摘要:

    由于滴灌滴頭流道曲折復(fù)雜,各種結(jié)構(gòu)參數(shù)都不同程度地影響著滴頭水力性能,滴頭水力性能分析時(shí),很難建立顯式的解析模型。為此提出基于移動(dòng)最小二乘響應(yīng)曲面法建立滴頭水力性能可靠性指標(biāo)對(duì)應(yīng)結(jié)構(gòu)影響參數(shù)的靈敏度分析模型。結(jié)果表明,滴頭流道流量系數(shù)的可靠度對(duì)流道長(zhǎng)度和流道寬度的均值靈敏性較強(qiáng),對(duì)流道轉(zhuǎn)角的均值靈敏性較差;滴頭流道流態(tài)指數(shù)的可靠度對(duì)流道寬度和流道轉(zhuǎn)角的均值靈敏性較強(qiáng),對(duì)流道長(zhǎng)度的均值靈敏性較差;基本變量標(biāo)準(zhǔn)差的增加會(huì)降低滴頭流道流量系數(shù)和流態(tài)指數(shù)的可靠度。基于移動(dòng)最小二乘響應(yīng)曲面滴頭水力性能可靠性靈敏度分析結(jié)果與通常的定性分析結(jié)果一致,驗(yàn)證了本方法的有效性。

    Abstract:

    Considering the complicated relation of triangle labyrinth channel parameters to hydraulic performance, the explicit analytical model was not figured out. Moving least squares response surface methodology was introduced to build parameter sensitivity model corresponding to reliability of hydraulic performance. The analysis of parameter sensitivity shows that the length and the width of triangle labyrinth channel parameters have great influence on the reliability of flux coefficient. Meanwhile, the width, and the angle of triangle labyrinth channel parameters have great influence on the reliability of flow index. Standard deviation increasing in the parameters of triangle labyrinth channel will reduce the reliability of flux coefficient and flow index. The reliability sensitivity analysis for hydraulic performance demonstrates that the result of presented method is accord with the qualitative analysis. Thus the proposed method is efficient and accurate.

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劉春景,唐敦兵,何華,陳興強(qiáng).滴灌三角形迷宮滴頭水力性能穩(wěn)健性分析[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2013,44(1):67-72. Liu Chunjing, Tang Dunbing, He Hua, Chen Xingqiang. Hydraulic Performance Robustness Analysis for Drip Irrigation Triangle Labyrinth Channel of Emitter[J]. Transactions of the Chinese Society for Agricultural Machinery,2013,44(1):67-72.

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  • 在線發(fā)布日期: 2012-12-31
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