本文關(guān)鍵詞： 風(fēng)電齒輪箱 載荷譜 疲勞壽命 裂紋擴(kuò)展　出處：《華北電力大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：風(fēng)力發(fā)電是世界各國都在大力發(fā)展的新能源產(chǎn)業(yè),風(fēng)電機(jī)組作為風(fēng)力發(fā)電系統(tǒng)的關(guān)鍵設(shè)備之一,其性能問題也得到了重視。齒輪箱作為風(fēng)電機(jī)組的核心部件,其是否能正常運轉(zhuǎn)對整個風(fēng)電機(jī)組的安全工作起著決定性作用。本文主要針對齒輪箱內(nèi)傳動系統(tǒng)各級齒輪副的疲勞壽命進(jìn)行研究。以現(xiàn)有的風(fēng)電齒輪箱的實測時間-扭矩數(shù)據(jù)依據(jù),利用概率統(tǒng)計、疲勞分析、斷裂力學(xué)和有限元等方法,系統(tǒng)全面的研究了風(fēng)電機(jī)組齒輪箱內(nèi)各級齒輪在隨機(jī)載荷的作用下的疲勞壽命預(yù)測及疲勞裂紋擴(kuò)展分析。 本文先選用雨流計數(shù)法對各個工況下的實測數(shù)據(jù)統(tǒng)計處理,并最后得到時間-載荷數(shù)據(jù)。將這些數(shù)據(jù)編制成在各個工況下的二維載荷譜,分析各級齒輪分別在各個工況下的疲勞應(yīng)力分布,結(jié)合實測工況頻率合成多工況的二維載荷譜。依據(jù)名義應(yīng)力法,分別采用Miner線性疲勞累積損傷理論和Carten-Dolan非線性疲勞累積損傷理論,對各級齒輪進(jìn)行疲勞壽命估算,得到應(yīng)用Carten-Dolan理論得到的計算結(jié)果比應(yīng)用Miner理論得到的結(jié)果更安全。之后,在此分析結(jié)果上研究齒輪的幾種參數(shù)對其疲勞壽命的影響。另外,本文還從疲勞裂紋擴(kuò)展角度,以斷裂力學(xué)的相關(guān)理論為基礎(chǔ),對增速齒輪箱具有代表性的行星輪系和高速級齒輪進(jìn)行有限元分析,預(yù)測其剩余疲勞壽命,驗證了上一種方法的合理性。
[Abstract]:Wind power generation is a new energy industry which is developing vigorously all over the world. As one of the key equipments of wind power generation system, wind turbine has been paid more attention to its performance, and the gearbox is the core component of wind turbine. Whether it can run normally plays a decisive role in the safety work of the whole wind turbine. This paper mainly studies the fatigue life of each gear pair in the transmission system of the gear box. Meter-torque data basis, By means of probability statistics, fatigue analysis, fracture mechanics and finite element method, the fatigue life prediction and fatigue crack propagation analysis of all levels of gears in the gear box of wind turbine are studied systematically and comprehensively under the action of random load. In this paper, the rain flow counting method is first used to process the measured data under various working conditions, and finally the time-load data are obtained, and these data are compiled into two-dimensional load spectra under each working condition. In this paper, the fatigue stress distribution of gear at all levels under different working conditions is analyzed, and the two dimensional load spectrum of multiple working conditions is synthesized by combining with the measured working condition frequency, according to the nominal stress method, Miner linear fatigue cumulative damage theory and Carten-Dolan nonlinear fatigue cumulative damage theory are used to estimate the fatigue life of gear at all levels. The calculated results obtained by using Carten-Dolan theory are more secure than those obtained by Miner theory. The influence of several parameters of gear on its fatigue life is studied in this paper. In addition, from the angle of fatigue crack propagation, this paper is based on the theory of fracture mechanics. The finite element analysis of planetary gear train and high speed gear with representative speed gearbox is carried out to predict its residual fatigue life and the rationality of the above method is verified.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM315;TH132.41

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