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基于灰色系統(tǒng)理論的鋁合金覆蓋件成形優(yōu)化模擬
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    摘要:

    以壓邊力、拉深筋高度、凸筋圓角半徑、凹筋圓角半徑為自變量，進(jìn)行四因素四水平的正交試驗，模擬鋁合金覆蓋件成形，獲得成形工藝參數(shù)與破裂、起皺、厚度最大變薄率等質(zhì)量數(shù)據(jù)的目標(biāo)函數(shù)。利用灰色系統(tǒng)理論，分別計算得到成形工藝參數(shù)對單目標(biāo)函數(shù)的關(guān)聯(lián)系數(shù)和多目標(biāo)函數(shù)的關(guān)聯(lián)度，多目標(biāo)優(yōu)化將轉(zhuǎn)換為單目標(biāo)優(yōu)化問題。進(jìn)一步計算各成形工藝參數(shù)的平均關(guān)聯(lián)度，獲得優(yōu)化的壓邊力、拉深筋截面幾何參數(shù)，以此進(jìn)行有限元模擬驗證，優(yōu)化的結(jié)果為變形均勻，表明成形的質(zhì)量明顯提高。

    Abstract:

    The aluminum alloy auto panel strength beam was numerical simulated by FEM software while press force, the depth, die radius, punch radius of draw bead were independent variables, the data about the crack, winkle and the thinning were acquired by an orthogonal experiment. Then the grey relational generating between forming process and the single objective function, the grey rational grade of multi-objective were calculated by the grey theory system, thus the multi-objective design was changed into the single-objective design. Furthermore the average grey relational grade of the forming process was analyzed. Employing the optimization data, the auto panel forming was numerically simulated. The conclusion demonstrated that the sheet forming quality is obviously increased by the optimized forming process parameters. 

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趙茂俞,薛克敏,李萍.基于灰色系統(tǒng)理論的鋁合金覆蓋件成形優(yōu)化模擬[J].農(nóng)業(yè)機(jī)械學(xué)報,2008,39(10):207-210.[J]. Transactions of the Chinese Society for Agricultural Machinery,2008,39(10):207-210.

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