Perato帕累托在沖壓過程同時控制減薄和回彈的優(yōu)化設(shè)計方法外文翻譯講課稿

1、Good is good, but better carries it.精益求精，善益求善。Perato帕累托在沖壓過程同時控制減薄和回彈的優(yōu)化設(shè)計方法外文翻譯-在沖壓過程中Pareto同時控制細(xì)化和回彈的優(yōu)化設(shè)計方法Plitudetngshkngzhjinbohhudnyuhushjfngfzichngyguchng字典-HYPERLINK.hk/dictionary?source=translation&hl=zh-CN&q=A%20PARETO%20OPTIMAL%20DESIGN%20APPROACH%20FOR%20SIMULTANEOUS%20%20CONTROL%20OF%20T

2、HINNING%20AND%20SPRINGBACK%20IN%20STAMPING%20&langpair=en|zh-CN查看字典詳細(xì)內(nèi)容RosaDiLorenzo1*,GiuseppeIngarao1,FabrizioMicari1,FranciscoChinesta21UniversitdiPalermo,Dip.diTecnologiaMeccanicaProduzioneeIngegneriaGestionaleVialedelleScienze-90128Palermo(Italy)2法國國家科學(xué)研究中心LMSPUMR-ENSAM，151大道德里總醫(yī)院，75013巴黎，法國摘要：

3、在汽車領(lǐng)域中最相關(guān)的研究課題之一是在減少沖壓件重量的同時增加其強度。這樣，一個較強的的研究工作是開發(fā)能夠被廣泛利用需要適當(dāng)回彈控制的高強度鋼材。在板料成形過程中回彈的減少是一個細(xì)化與減少相沖突的典型的目標(biāo)。因此，這些問題都可以看作是由相互沖突的具有多目標(biāo)特征被考慮。更重要的是，如今，一個偉大的研究將集中在諸多中的最優(yōu)方案，而不是一個單一的解決方案，特別是在工業(yè)環(huán)境。本文中數(shù)據(jù)模擬、響應(yīng)曲面法和帕累托最優(yōu)解搜索技術(shù)的整合被應(yīng)用于以設(shè)計一個DP600U型通道形狀的沖壓操作。尤其是對作為設(shè)計變量的摩擦條件與壓邊力進(jìn)行了優(yōu)化，以實現(xiàn)兩個不同的目標(biāo)：減少過多的細(xì)化和避免由于回彈發(fā)生的過度幾何扭曲。關(guān)鍵詞

4、：金屬板沖壓、變薄、回彈、響應(yīng)面法的多目標(biāo)優(yōu)化朗讀1簡介在汽車領(lǐng)域中最相關(guān)的研究議題之一是研究在減少沖壓件的重量是同時增加其強度。這些問題導(dǎo)致了材料的成功，如高強度鋼（TRIP,DP等），它們是由成形操作后強大的回彈力產(chǎn)生的1-3。其中一個主要議題，板料成形過程中回彈控制問題，如今進(jìn)行了計算機(jī)仿真校準(zhǔn)。具體而言，主要問題方面：數(shù)值參數(shù)標(biāo)定4,5;關(guān)于本構(gòu)模型的回彈影響6工藝參數(shù)的影響7。金屬板材成形過程中大部分的問題是多目標(biāo)優(yōu)化問題，一般由相互沖突的目標(biāo)來描述。在板料成形過程中由矛盾目標(biāo)描述的最典型優(yōu)化的例子是為防止開裂和回彈定義的適當(dāng)工藝參數(shù)。更重要的是，一個偉大的研究將集中在諸多中的最優(yōu)方

5、案，而不是一個單一的解決方案。因此，設(shè)計參數(shù)標(biāo)定，完成所有的目標(biāo)，是困難的，有時是不成功的。為了克服這一缺點，以帕累托最優(yōu)解的搜索技術(shù)為基礎(chǔ)的多目標(biāo)優(yōu)化過程中，似乎是一個非常有吸引力的辦法來處理板材成形工藝設(shè)計8,9。本文中數(shù)據(jù)模擬、響應(yīng)曲面法和帕累托最優(yōu)解搜索技術(shù)的整合被應(yīng)用于以設(shè)計一個DP600U型通道形狀的沖壓操作。尤其是對作為設(shè)計變量的摩擦條件與壓邊力進(jìn)行了優(yōu)化，以實現(xiàn)兩個不同的目標(biāo)：減少過多的細(xì)化和避免由于回彈發(fā)生的過度幾何扭曲。10,11優(yōu)化程序的步驟包括用于在設(shè)計領(lǐng)域必要的變量數(shù)據(jù)鑒定的中心復(fù)合設(shè)計（CCD）應(yīng)用，然后收集由CCD所確定的樣本數(shù)值模擬（顯式隱式），運行和輸出的數(shù)據(jù)

6、變量。包括曲面模型的發(fā)展的下列步驟解釋了最終目標(biāo)，作為函數(shù)設(shè)計變量和驗證的功能。最后，執(zhí)行為達(dá)到最佳設(shè)計變量的帕累拖最優(yōu)解。其最終目的是開發(fā)一種能夠識別一種分析過程的加工窗口和減少計算量的預(yù)測工具，特別是針對多優(yōu)化技術(shù)或傳統(tǒng)的試錯方法?？蓪嵤┑某绦?qū)υS多可能的技術(shù)方案進(jìn)行了研究，獲得了一系列能夠滿足不同設(shè)計要求的可靠方案。2分析過程所考慮的形成過程是一個旨在獲得S形U型通道的典型沖壓（參考圖1被調(diào)查過程的素描）。一個15毫米的高度被考慮在內(nèi)。所利用的材料是一種1mm厚的DP-600高強度鋼，為了進(jìn)行以下流動規(guī)律的分析，通過在0方向開展拉伸試驗獲得試樣：=10080.169兆帕。圖1：分析過程示

7、意圖以下是蘭克福德的各向異性參數(shù)：r0=0.73;r45=0.9;r90=0.93。這個過程是使用LS-DYNA的明碼進(jìn)行的數(shù)值模擬，和用LS-DYNA的隱式求解進(jìn)行隨后的回彈分析。這些數(shù)值模型5中根據(jù)對以往的經(jīng)驗，利用一個在厚度方向上有9個集合點的完整綜合四邊形殼單元，在特別是，原始尺寸為3mm和三個層次的幾何網(wǎng)格調(diào)整策略被應(yīng)用于數(shù)值模擬。在最后顯示的仿真單元總數(shù)比4000高;摩擦的操作考慮一個庫侖模式。為了利用各向同性加工硬化來考慮材料的各向異性Barlat-Lian的本構(gòu)模型12。為了在隱式模擬下評估回彈實體即利用CAD工具與一個參考目標(biāo)形狀進(jìn)行比較。特別是，計算這些目標(biāo)形狀和所得到的形

8、狀之間的總偏差，（即兩個重疊表面之間的最大正常的距離）。3最優(yōu)化問題該考慮的優(yōu)化問題是在最后部分盡量減少（為了防止開裂）變薄，同時也盡量減少回彈的發(fā)生。因此，在模型階段的研究問題上兩個目標(biāo)函數(shù)被定義為：t最后部分測量的最大變薄量和dmm這是最后的形狀與參考目標(biāo)形狀的最大偏差。該問題建模還包括設(shè)計變量的定義：在被調(diào)查的過程中選擇兩個設(shè)計變量，即摩擦系數(shù)（）和壓邊力值（BHFKN）其實，與所分析的目標(biāo)函數(shù)變量有關(guān)的設(shè)計變量的選擇，因為這些變量在表中強烈影響制約力量，在這影響變薄、回彈實體的過程中。一旦進(jìn)行了優(yōu)化問題的建模，在摘要中提出的工作流程按照下列步驟進(jìn)行：步驟1.數(shù)值模擬運行的規(guī)劃是通過適當(dāng)

9、的實驗設(shè)計（DOE）定義來實現(xiàn)的；步驟2.數(shù)據(jù)仿真的發(fā)展，根據(jù)所設(shè)計的DOE；步驟3運用DOE的.數(shù)字?jǐn)?shù)據(jù)收集獲得薄度（t%）和回彈量（d），為確定每個條件；步驟4.原建模步驟：作為設(shè)計變量的一種功能來描述目標(biāo)函數(shù)，響應(yīng)面的分析制定；步驟5.響應(yīng)精度表面所獲得的評價，運用實際數(shù)值通過響應(yīng)表面的誤差預(yù)測（像關(guān)于適當(dāng)選擇設(shè)計領(lǐng)域的點的評估的發(fā)展）；步驟6.-約束法的應(yīng)用，以執(zhí)行一個多目標(biāo)優(yōu)化，即以確定最佳Pareto解決方案。步驟1被認(rèn)為是，中央綜合設(shè)計（CCD）的建筑被選定來設(shè)計一系列的實驗/模擬，實際上，為適合二階響應(yīng)面，這是最有利的做法之一。特別是，表1所示的實驗設(shè)計是為兩個設(shè)計變量制定的。

10、表1：設(shè)計變量的使用水平設(shè)計變量DOE水平-1010.0920.10.120.140.148壓力邊kN6480120160176在不同的設(shè)計變量中，進(jìn)行模擬設(shè)計，獲得最大薄度（t）和回彈量（d）。圖2顯示了回彈的數(shù)值分布，圖3顯示了DOE的一個模擬細(xì)化分配，特別是=0.12和BHF=120KN。圖2：回彈分布（dmm）圖3：細(xì)化分布（t）4討論的結(jié)果和結(jié)論一旦設(shè)計的數(shù)據(jù)模擬被開發(fā)出來，步驟4和5的程序也被開發(fā)出來和有兩個目標(biāo)函數(shù)決定兩個反應(yīng)表面（參考圖4和圖5分別為響應(yīng)面的細(xì)化和回彈，所有值正常化）。通過一個“啟發(fā)式”回歸法（在Minitab的環(huán)境下開發(fā)的）獲得最佳的反應(yīng)函數(shù)，隨后排除在統(tǒng)計上

11、較少的顯著的因素13。這類程序?qū)е铝思?xì)化的一個三階多項式函數(shù)，并為回彈的兩個二階一項函數(shù)提供非常滿意的相關(guān)系數(shù)。用t%和d的預(yù)測值和實際值的對比對所得方程進(jìn)行預(yù)測誤差測量，這樣的測試表明了兩個表面良好的預(yù)測能力。一旦響應(yīng)表面有效性進(jìn)行了測試，就可進(jìn)行Pareto最優(yōu)解測定。用于確定Pareto解決方案技術(shù)是-約束法。特別是，在-約束方法的發(fā)展上，選擇細(xì)化功能作為進(jìn)行優(yōu)化的主要功能。測定由此產(chǎn)生的Pareto曲線，通過繪制t%和d的曲線表示Pareto邊界，發(fā)表在圖6上。得到的邊界是一種有效的設(shè)計工具，因為它提供了Pareto最優(yōu)解集：通過確定一個理想水平的細(xì)化，例如可能預(yù)見被期望的最低可能回彈

12、水平。此外，對一些屬于Pareto邊界的點進(jìn)行了數(shù)值復(fù)制（例如，在圖6中看到的點1到3）。3個Pareto點所對應(yīng)的結(jié)果，在圖7中作為回彈表示；在圖8中作為細(xì)化表示。圖4：響應(yīng)表面細(xì)化圖5：響應(yīng)表面回彈圖6：帕累托邊界此外，對于屬于Pareto邊界每一個點，它可以知道哪個組合設(shè)計變量（壓邊力和摩擦系數(shù)的值）對應(yīng)于給定的細(xì)化和回彈的水平。因此，可以考慮把所獲得的曲線作為一種設(shè)計工具，用一個可達(dá)到的目標(biāo)中的設(shè)計結(jié)果定義設(shè)計變量。表3顯示了所選擇的點設(shè)計變量的值。所得到的值與相應(yīng)細(xì)化和回彈的發(fā)生是非常相互一致的。這種考慮允許評估開發(fā)設(shè)計工具的有效性。事實上，得到的結(jié)果證明了該方法的有效性。表2：Pa

13、reto邊界上點1-2-3的設(shè)計變量設(shè)計變量Pareto點1230.1380.1250.09BHFKN16010464圖7：期望的和結(jié)果的（回彈效應(yīng)）形狀之間比較，Pareto邊界線上的點1-2-3圖8：Pareto邊界上點1-2-3的分條細(xì)化參考文獻(xiàn)1BanuM.，TakamuraM.,HamaT.，NaidimO.，TeodosiuC.，MakinouchiA：在沖壓過程中雙相鋼軌形件回彈和起皺仿真。材料加工技術(shù)雜志173：178-184，2006。2KocM.,ChenP.:先進(jìn)高強度鋼的成形回彈變化模擬研究。材料加工技術(shù)雜志190：189-198，2007。3AsgariM.，Pere

14、iraB.F.，RolfeM.，DingleP.D，HodgsonS.A.:板材成型和回彈分析的有限元模仿真統(tǒng)計分析。材料加工技術(shù)雜志203：129-136，2008。4XuW.L.,MaC.H.,LiC.H.FengW.J.:板料成形回彈模擬的敏感因素材料加工技術(shù)雜志，151：217-222，2004。5FratiniL.,IngaraoG.,MicariF.:在金屬板材三維成形回彈預(yù)測過程。國際鋼鐵研究，2008年。6A.Faust,K.Roll.:采用先進(jìn)材料模具的現(xiàn)代高強度鋼的數(shù)值回彈評價5FldnLIngaraok,Micarilu:Zijnshbncisnwichngxnghudn

15、ycguchng.Gujgngtiynji,2008nin.字典-HYPERLINK.hk/dictionary?source=translation&hl=zh-CN&q=The%20best%20performing%20response%20functions%20were%20obtained%20by%20an%20“heuristic”%20regression%20procedure%20(developed%20within%20Minitab%20Environment)%20by%20subsequent%20exclusions%20of%20%20%20factors%

16、20which%20are%20statistically%20less%20significant%20%5b13%5d.%20Such%20procedure%20led%20to%20a%20third%20order%20polynomial%20function%20for%20thinning%20and%20to%20a%20second%20order%20one%20for%20springback%20both%20%20%20providing%20very%20satisfying%20correlation%20index.%20The%20obtained%20eq

17、uations%20were%20tested%20measuring%20the%20prediction%20errors%20derived%20from%20the%20comparison%20between%20the%20predicted%20%20%20values%20of%20t%25%20and%20d%20and%20the%20actual%20numerical%20values;%20such%20tests%20demonstrated%20the%20good%20prediction%20capability%20of%20the%20two%20surf

18、aces.%20Once%20the%20effectiveness%20of%20the%20response%20%20%20surfaces%20was%20tested,%20the%20determination%20of%20Pareto%20optimal%20solutions%20was%20performed.%20The%20technique%20utilized%20to%20determine%20Pareto%20solutions%20was%20the%20%20-constraint%20procedure.%20In%20particular,%20the

19、%20thinning%20function%20was%20chosen%20as%20primary%20function%20to%20be%20optimized%20in%20the%20%20development%20of%20the%20%20-constraint%20method.%20The%20resulting%20Pareto%20curve%20was%20determined%20and%20it%20is%20reported%20in%20Figure%206%20in%20which%20the%20Pareto%20frontier%20is%20ill

20、ustrated%20by%20plotting%20%20%20the%20curve%20%20t%25%20vs.%20d.%20The%20obtained%20frontier%20is%20an%20effective%20design%20tool%20since%20it%20provides%20a%20set%20of%20Pareto%20optimal%20solutions:%20by%20fixing%20a%20desired%20level%20of%20thinning,%20for%20instance,%20it%20is%20possible%20to%

21、20foresee%20which%20minimum%20possible%20level%20of%20springback%20has%20to%20be%20expected.%20%20%20Furthermore,%20some%20points%20belonging%20to%20the%20Pareto%20frontier%20were%20numerically%20reproduced%20(for%20instance,%20see%20points%20from%201%20to%203%20evidenced%20in%20Figure%206).%20The%2

22、0results%20corresponding%20to%20the%20three%20Pareto%20points%20are%20illustrated%20in%20Figure%207%20as%20springback%20is%20concerned%20and%20in%20Figure%208%20as%20thinning%20is%20regarded.%20%20&langpair=en|zh-CN查看字典詳細(xì)內(nèi)容。Numisheet第七次會議發(fā)表，頁503-507，2008。7A.Mangas,A.Arroyo,I.Fernandes,B.Gonzalez：通過基

23、于經(jīng)驗的實驗的優(yōu)化程序提高回彈有限元數(shù)據(jù)模擬。IDDRG會議的會議記錄，頁153-160，2006。8MessacA.,MullurA.A.:一種計算高效率的元建模方法，為昂貴的多目標(biāo)優(yōu)化。優(yōu)化工程，9：37-67，2008。9MarlerT.R.,Chang-HwanK.,AroraJ.S.:使用多目標(biāo)優(yōu)化的辨別系統(tǒng)來簡化復(fù)雜模型。Comput.MethodsAppl.Mech.Engrg,195：4383-4395，2006。10FiratM.:U型通道的形成與回彈變形的重點分析。材料和設(shè)計，28:147-154，2007。11PapeleuxL.,PonthotJ.P.:在金屬板料成形過

24、程中回彈的有限元模擬。兵器材料加工技術(shù)，125-126：785-791，2002。12BarlatF.,LianF.J.:塑料板材的成形和拉伸第一部分.在平面應(yīng)力條件下屈服函數(shù)的正交異性表?？伤苄缘膰H雜志，5：51-66，1989。13MyersR.H.,MontgomeryD.C.:響應(yīng)曲面法的工藝和使用自行設(shè)計實驗的產(chǎn)品優(yōu)化。JohnWiley和Sons公司，紐約，美國，第二版。2002。8Miskd,Mullurjgunj:Yzhngnggudedumbioyuhujsunxiolgoyunjinmfngf.Yuhugngchng,9:37-67,2008.字典-HYPERLINK.h

25、k/dictionary?source=translation&hl=zh-CN&q=The%20best%20performing%20response%20functions%20were%20obtained%20by%20an%20“heuristic”%20regression%20procedure%20(developed%20within%20Minitab%20Environment)%20by%20subsequent%20exclusions%20of%20%20%20factors%20which%20are%20statistically%20less%20signi

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