2吊(diao)臂(bi)截(jie)麵(mian)形(xing)式(shi)的(de)確(que)認(ren)吊(diao)臂(bi)由(you)上(shang)下(xia)翼(yi)緣(yuan)板(ban)和(he)腹(fu)板(ban)焊(han)接(jie)而(er)成(cheng),對(dui)錯(cuo)對(dui)稱(cheng)的(de)類(lei)橢(tuo)圓(yuan)截(jie),如(ru)所(suo)示(shi)。此(ci)截(jie)麵(mian)與(yu)傳(chuan)統(tong)的(de)箱(xiang)型(xing)及(ji)多(duo)邊(bian)形(xing)截(jie)麵(mian)比(bi)較(jiao),特(te)點(dian)是(shi):(D前後滑塊分別支承在圓角處,能傳遞大部分側向力,無需另加側向支承,且能較好的傳遞扭矩與橫向力。(2)當接受滑塊部分應力時分,由於曲邊截麵傑出的力學性能,使得上下翼緣板板厚更小。(3)下翼緣板和腹板的實踐核算寬度較小,曲板相對於平板剛度係數大,抗屈曲性能強,有利於進步抗失穩能力。(4)大(da)圓(yuan)角(jiao)能(neng)夠(gou)有(you)用(yong)削(xue)減(jian)平(ping)板(ban)的(de)寬(kuan)度(du),並(bing)且(qie)對(dui)平(ping)板(ban)形(xing)成(cheng)很(hen)強(qiang)的(de)嵌(qian)固(gu)大(da)大(da)進(jin)步(bu)其(qi)部(bu)分(fen)臨(lin)界(jie)力(li)。綜(zong)上(shang)所(suo)述(shu),該(gai)種(zhong)截(jie)麵(mian)能(neng)夠(gou)較(jiao)好(hao)發(fa)揮(hui)資(zi)料(liao)的(de)機(ji)械(xie)性(xing)圖(tu)I各節臂規劃變量3吊臂有限元分析3.1參數化實體模型的樹立在DM模塊中樹立吊臂模型,建模過程中將每節臂的各個板厚、三節臂的腹板高度及其腹板間距設置成變量,即中的P1~Pn共11個規劃變量,模型及規劃變量與Mechanical模塊完成無縫連接。
3.2載荷核算及約束處理在Mechanical模塊中進行吊臂有限元分析,滑塊資料選用鑄青銅,吊臂選用高強鋼,並按曆類載荷核算。其間,仰角a=32°,起升載荷Q=1212.750kN,鋼絲繩拉力S=212.763kN,側向載荷T=100.656kN,重力加速度g=9.8m/s'2,吊臂優化的數學模型如下:滑塊滑塊燮04.2根據神經網絡的呼應麵規劃為了選取典型樣本,並且削減核算時刻,選用DOE(實驗規劃)fa。zaizhangliangshujujiaorongyanjiuzhong,tangkelunyishijiaozhangliangdekongjianjiemianquxianweichushiquxian,yisanzuobiaozhangliangjicedingdejingbanjingbuchanghoudeweizhidianweiquxianbianxinggeidingdexingzhidian,jingguoquxianbianxingshixingoujiandequxianjingguoxingzhidian,wanchengshujudejiaorong,jinbulezhudongshijiaotiqulunkuodejingdukou。gaoyingzhongjiangsanweijiguangzhangliangjinenghelitishijiaojinengxiangjiehe,yonglitishijiaohuoqushujudelinghuoxingmibusanweijiguangzhangliangjinengdeyiloucaiquexian,jingguoerzhedeshujujiaoronghuodejiaowanzhengdemoxingshujushiyongnixianggongchengzhongchumoshizhangliangjingduxianzhegaoyufeichumoshi(掃描)丈zhang量liang精jing度du的de這zhe一yi特te點dian,提ti出chu了le一yi種zhong根gen據ju曲qu麵mian變bian形xing技ji能neng的de觸chu摸mo式shi丈zhang量liang和he非fei觸chu摸mo式shi丈zhang量liang數shu據ju交jiao融rong的de辦ban法fa,即ji把ba零ling件jian掃sao描miao後hou的de點dian雲yun經jing逆ni向xiang建jian模mo作zuo為wei初chu始shi變bian形xing曲qu麵mian,在zai零ling件jian的de複fu雜za曲qu麵mian上shang用yong觸chu摸mo式shi丈zhang量liang辦ban法fa丈zhang量liang一yi係xi列lie特te征zheng點dian作zuo為wei變bian形xing條tiao件jian,導dao入ruThinkDesign軟(ruan)件(jian)中(zhong)經(jing)過(guo)曲(qu)麵(mian)變(bian)形(xing)的(de)方(fang)法(fa)對(dui)初(chu)始(shi)模(mo)型(xing)進(jin)行(xing)調(tiao)整(zheng),以(yi)此(ci)進(jin)步(bu)逆(ni)向(xiang)建(jian)模(mo)的(de)精(jing)度(du)。在(zai)逆(ni)向(xiang)建(jian)模(mo)時(shi),由(you)掃(sao)描(miao)儀(yi)獲(huo)取(qu)的(de)零(ling)件(jian)的(de)點(dian)雲(yun)數(shu)據(ju),經(jing)逆(ni)向(xiang)建(jian)模(mo)軟(ruan)件(jian)處(chu)理(li),一(yi)般(ban)都(dou)能(neng)夠(gou)體(ti)進(jin)行(xing)優(you)化(hua)今(jin)後(hou),考(kao)慮(lv)到(dao)加(jia)工(gong)條(tiao)件(jian),需(xu)要(yao)對(dui)優(you)化(hua)值(zhi)進(jin)行(xing)圓(yuan)整(zheng),從(cong)表(biao)2中能夠看出,對板厚圓整後,吊臂的強度滿意要求,優化後的吊臂分量削減了21.09%,吊臂自重顯著降低。經過對圓整後的優化結果進行分析核算,吊臂的剛度也滿意要求,此處不再贅述。(4)結jie果guo表biao明ming,將jiang根gen據ju神shen經jing網wang絡luo的de呼hu應ying麵mian法fa和he多duo目mu標biao遺yi傳chuan算suan法fa優you化hua有you用yong地di結jie合he起qi來lai,在zai致zhi力li於yu解jie決jue一yi些xie非fei線xian性xing程cheng度du較jiao高gao的de問wen題ti上shang,優you勢shi顯xian著zhe。該gai辦ban法fa對dui於yu包bao括kuo大da型xing起qi重zhong機ji在zai內nei的de相xiang關guan工gong程cheng機ji械xie規gui劃hua,具ju有you推tui行xing意yi義yi。
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