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對斜齒輪工作運轉程度的流體型探索分析
軟件對斜齒輪的彎曲疲勞強度的研究是可行的。彎曲疲勞強度;彎曲應力;有限元分析;有限元模型中圖號TH13斜齒輪結構緊湊,具有較大的傳扭能力,是齒輪傳動中較為復雜的一種,廣泛應用于船舶、汽車、航空、電力、工程機械等眾多行業中,其工作性能對整個傳動系統有至關重要的影響。
發布日(ri)期(qi):2018 - 07 - 17 00:00:00

軟件對斜齒輪的彎曲疲勞強度的研究是可行的。彎曲疲勞強度;彎曲應力;有限元分析;有限元模型中圖號TH13斜齒輪結構緊湊,具有較大的傳扭能力,是齒輪傳動中較為復雜的一種,廣泛應用于船舶、汽車、航空、電力、工程機械等眾多行業中,其工作性能對整個傳動系統有至關重要的影響。當前我國的斜齒輪研究如果仍采用國家標準所提供的數據,會有一定的風險,所以對國產斜齒輪進行疲勞強度研究是非常必要的。斜齒輪的彎曲疲勞強度在齒輪嚙(nie)合傳動過程中,齒輪齒根的危險截面承受彎曲應力、壓應力和剪切應力,起主導作,齒根受拉一側危險截面處的應力應為彎曲拉應力和殘余壓應力的合成。


輪齒的彎曲折斷失效。彎曲疲勞的強度極限,輪齒產生斷裂。齒根過渡形式對輪齒彎曲強度的影響。在機械行業中,大量使用漸開線齒輪來傳遞運動和動力,而齒輪工作壽命又與其彎曲疲勞強度有關,決定提高具有重要的意義。齒輪的工作壽命與最大彎曲應力值的n(n6)次方成反比,即彎曲應力略微減小,可使齒輪的工作壽命大大延長。在齒根過渡曲線處,形體發生突變,將會產生應力集中現象,所以漸開線齒輪的最大彎曲應力總是發生在齒根過渡曲線處,這會直接影響齒輪壽命。最大齒根彎曲應力值與齒根過渡曲線的形狀及其微分性質關系很大。進行齒輪的彎曲疲勞試驗,得出試驗齒輪的彎曲疲勞強度的數據利用冶金機械廠提供的斜齒輪試件,進行齒輪彎曲疲勞的試驗。試驗預采用雙齒脈動加載法。被試齒輪在所有試驗齒輪中隨機抽取,并保證同一應力水平的被試齒來自各個齒輪。在短壽命區采用四級恒得出每個應力水平對應的48個齒輪試驗的壽命,以擬合疲勞曲線傾斜段方程;在長壽命區采用應力升降法,以確定疲勞曲線水平段方程,從而獲得完整的齒輪彎曲疲勞曲線。


試(shi)驗(yan)因(yin)采用(yong)雙齒(chi)(chi)(chi)加載試(shi)驗(yan),當其中(zhong)一(yi)個齒(chi)(chi)(chi)失效(以(yi)輪齒(chi)(chi)(chi)折(zhe)斷或輪齒(chi)(chi)(chi)裂紋(wen)擴展致使試(shi)驗(yan)機(ji)聲音(yin)突變時的(de)(de)應(ying)力循環次數(shu)(shu)(shu)為(wei)失效壽(shou)命(ming)(ming))時,試(shi)驗(yan)就停止(zhi)(zhi)。對于未失效齒(chi)(chi)(chi)來(lai)說,該壽(shou)命(ming)(ming)是(shi)中(zhong)止(zhi)(zhi)試(shi)驗(yan)數(shu)(shu)(shu)據(ju)。這樣可(ke)(ke)以(yi)采用(yong)數(shu)(shu)(shu)值(zhi)分(fen)布得出每次應(ying)力水平Si的(de)(de)失效密度(du)函數(shu)(shu)(shu),便于得出不同可(ke)(ke)靠度(du)R下(xia)的(de)(de)應(ying)力Si與壽(shou)命(ming)(ming)Ni之間的(de)(de)關系。為(wei)充分(fen)利用(yong)試(shi)驗(yan)信(xin)息,數(shu)(shu)(shu)據(ju)處(chu)(chu)理(li)中(zhong)采用(yong)了(le)平均順序(xu)法(fa)進行(xing)壽(shou)命(ming)(ming)分(fen)布檢驗(yan)。應(ying)用(yong)MATLAB軟件(jian)對試(shi)驗(yan)數(shu)(shu)(shu)據(ju)進行(xing)分(fen)析MATLAB是(shi)一(yi)種科(ke)(ke)學(xue)計(ji)算軟件(jian),專門(men)以(yi)矩陣的(de)(de)形式處(chu)(chu)理(li)數(shu)(shu)(shu)據(ju)。利用(yong)MATLAB軟件(jian),對試(shi)驗(yan)數(shu)(shu)(shu)據(ju)進行(xing)分(fen)析。MATLAB的(de)(de)語言(yan)特點MATLAB是(shi)美國(guo)MathWorks公司開發的(de)(de)大型數(shu)(shu)(shu)學(xue)計(ji)算應(ying)用(yong)軟件(jian)系統,它(ta)提供了(le)強大的(de)(de)矩陣處(chu)(chu)理(li)和(he)繪(hui)圖功能(neng)(neng),簡(jian)單易用(yong),可(ke)(ke)信(xin)度(du)高,靈活性好,因(yin)而在世界(jie)范圍內被科(ke)(ke)學(xue)工(gong)(gong)作(zuo)者、工(gong)(gong)程(cheng)師以(yi)及大學(xue)生(sheng)和(he)研究生(sheng)廣泛使用(yong),目前已經(jing)成為(wei)國(guo)際市場上科(ke)(ke)學(xue)研究和(he)工(gong)(gong)程(cheng)應(ying)用(yong)方(fang)面的(de)(de)主導軟件(jian)。掌握MATLAB并借助它(ta)解(jie)決理(li)論(lun)與應(ying)用(yong)問題已經(jing)成為(wei)每一(yi)個從事科(ke)(ke)學(xue)研究和(he)工(gong)(gong)程(cheng)技術(shu)人(ren)員應(ying)該具備的(de)(de)技能(neng)(neng)。MATLAB給用(yong)戶帶來(lai)的(de)(de)是(shi)最直(zhi)觀,最簡(jian)潔的(de)(de)程(cheng)序(xu)開發環境。


MATLAB系統的(de)(de)(de)(de)基本函(han)數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)庫具有初等(deng)(deng)(deng)函(han)數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)、初等(deng)(deng)(deng)矩陣和(he)矩陣變換(huan),包(bao)(bao)括線(xian)(xian)性(xing)代數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)方(fang)(fang)程組和(he)矩陣特征值問題等(deng)(deng)(deng)數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)值線(xian)(xian)性(xing)代數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)、多項式運算和(he)求根、數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)據(ju)(ju)(ju)(ju)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)析(xi)(xi)(xi)(xi)和(he)傅立葉變換(huan)以(yi)及(ji)某些(xie)特殊的(de)(de)(de)(de)矩陣函(han)數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)和(he)數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)學函(han)數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)等(deng)(deng)(deng)眾多內(nei)(nei)容(rong)。另外(wai),MATLAB具有二維、三(san)維曲線(xian)(xian)和(he)三(san)維曲面繪圖功能(neng),使(shi)用(yong)(yong)方(fang)(fang)法(fa)(fa)(fa)(fa)十分(fen)(fen)(fen)(fen)(fen)(fen)(fen)方(fang)(fang)便(bian)。應用(yong)(yong)MATLAB軟(ruan)件分(fen)(fen)(fen)(fen)(fen)(fen)(fen)析(xi)(xi)(xi)(xi)試驗(yan)(yan)數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)據(ju)(ju)(ju)(ju)MATLAB提供了(le)完整的(de)(de)(de)(de)數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)據(ju)(ju)(ju)(ju)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)析(xi)(xi)(xi)(xi)與可(ke)視(shi)化(hua)能(neng)力,通過(guo)工(gong)具箱直接將數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)據(ju)(ju)(ju)(ju)導入到MATLAB的(de)(de)(de)(de)工(gong)作空間,利(li)用(yong)(yong)MATLAB的(de)(de)(de)(de)強大(da)(da)靈(ling)活(huo)的(de)(de)(de)(de)手段進行快速而又準確的(de)(de)(de)(de)數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)據(ju)(ju)(ju)(ju)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)析(xi)(xi)(xi)(xi)。這包(bao)(bao)括使(shi)用(yong)(yong)MATLAB提供的(de)(de)(de)(de)高(gao)級(ji)數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)學和(he)可(ke)視(shi)化(hua)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)析(xi)(xi)(xi)(xi)能(neng)力,在(zai)(zai)數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)據(ju)(ju)(ju)(ju)采集過(guo)程中或者采集完畢后,進行數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)據(ju)(ju)(ju)(ju)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)析(xi)(xi)(xi)(xi)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)析(xi)(xi)(xi)(xi)以(yi)及(ji)可(ke)視(shi)化(hua)工(gong)作。利(li)用(yong)(yong)MATLAB軟(ruan)件的(de)(de)(de)(de)強大(da)(da)功能(neng),對(dui)(dui)試驗(yan)(yan)得(de)(de)出(chu)的(de)(de)(de)(de)數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)據(ju)(ju)(ju)(ju)進行分(fen)(fen)(fen)(fen)(fen)(fen)(fen)析(xi)(xi)(xi)(xi),主要(yao)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)析(xi)(xi)(xi)(xi)方(fang)(fang)法(fa)(fa)(fa)(fa)有對(dui)(dui)數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)析(xi)(xi)(xi)(xi)法(fa)(fa)(fa)(fa)、對(dui)(dui)數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)正態分(fen)(fen)(fen)(fen)(fen)(fen)(fen)析(xi)(xi)(xi)(xi)法(fa)(fa)(fa)(fa)、兩參(can)數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)析(xi)(xi)(xi)(xi)法(fa)(fa)(fa)(fa)、三(san)參(can)數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)析(xi)(xi)(xi)(xi)法(fa)(fa)(fa)(fa),并(bing)將這些(xie)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)析(xi)(xi)(xi)(xi)法(fa)(fa)(fa)(fa)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)析(xi)(xi)(xi)(xi)得(de)(de)到的(de)(de)(de)(de)數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)據(ju)(ju)(ju)(ju)在(zai)(zai)MATLAB中利(li)用(yong)(yong)它的(de)(de)(de)(de)繪圖功能(neng)在(zai)(zai)雙對(dui)(dui)數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)坐標(biao)下(xia)進行最小二乘法(fa)(fa)(fa)(fa)的(de)(de)(de)(de)線(xian)(xian)性(xing)擬合,得(de)(de)到不(bu)同可(ke)靠(kao)度(du)、不(bu)同置(zhi)信度(du)下(xia)的(de)(de)(de)(de)R-S-N疲(pi)勞(lao)曲線(xian)(xian)。其(qi)中,因為(wei)MATLAB提供了(le)大(da)(da)量的(de)(de)(de)(de)內(nei)(nei)置(zhi)函(han)數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu),從(cong)而使(shi)試驗(yan)(yan)數(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)據(ju)(ju)(ju)(ju)的(de)(de)(de)(de)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)析(xi)(xi)(xi)(xi)更(geng)方(fang)(fang)便(bian)、更(geng)準確。

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