本文選題：滾動(dòng)軸承　切入點(diǎn)：動(dòng)力學(xué)　出處：《重慶大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：滾動(dòng)軸承是一種重要的基礎(chǔ)機(jī)械部件，在現(xiàn)代機(jī)器中廣泛應(yīng)用，軸承的運(yùn)行狀態(tài)對(duì)整個(gè)機(jī)械系統(tǒng)的動(dòng)力學(xué)性能起到非常重要的作用,軸承的振動(dòng)不僅直接影響主機(jī)的精度，而且影響轉(zhuǎn)子系統(tǒng)的運(yùn)行狀態(tài)，同時(shí)發(fā)出的噪聲還將污染周圍環(huán)境，隨著傳動(dòng)系統(tǒng)向高可靠性和高速靜音方向發(fā)展，對(duì)軸承系統(tǒng)的振動(dòng)和噪聲提出了愈來(lái)愈高的要求。 雖然現(xiàn)代加工工藝和加工精度得到了明顯改善和提高，但波紋度作為軸承分布式加工缺陷，仍然是激勵(lì)滾動(dòng)軸承振動(dòng)噪聲的主要因素之一。針對(duì)這個(gè)問(wèn)題，本文提出了一種新的軸承聲振耦合算法，可應(yīng)用于軸承-軸承座系統(tǒng)振動(dòng)聲學(xué)特征的預(yù)測(cè)，具有計(jì)算效率高的優(yōu)點(diǎn)；基于提出的新的軸承聲振耦合算法，分析研究了軸承內(nèi)、外圈波紋度參數(shù)變化對(duì)軸承-軸承座系統(tǒng)振動(dòng)聲學(xué)特性的影響，獲得了一些有價(jià)值的結(jié)論。論文的主要研究?jī)?nèi)容如下： ①基于Hertz接觸理論和軸承運(yùn)動(dòng)學(xué)的關(guān)系，推導(dǎo)了滾動(dòng)軸承承載區(qū)的非線性接觸力計(jì)算公式，并基于將軸承座內(nèi)表面考慮為一微質(zhì)量的剛性介質(zhì)層且存在剛性振動(dòng)的假設(shè)，建立了六自由度滾動(dòng)軸承動(dòng)力學(xué)模型，為進(jìn)一步進(jìn)行軸承的動(dòng)力學(xué)分析奠定了基礎(chǔ)； ②提出了軸承座內(nèi)表面位移映射法，運(yùn)用六自由度滾動(dòng)軸承動(dòng)力學(xué)模型，求解獲得軸承系統(tǒng)各部件振動(dòng)位移；通過(guò)軸承座內(nèi)表面位移映射法，實(shí)現(xiàn)了軸承動(dòng)力學(xué)模型的位移輸出和軸承座有限元模型的位移激勵(lì)輸入的耦合，簡(jiǎn)化了耦合計(jì)算，提高了計(jì)算效率； ③建立軸承-軸承座系統(tǒng)的有限元分析模型，研究了正常軸承激勵(lì)下的軸承座振動(dòng)響應(yīng)；建立了軸承座聲學(xué)邊界元分析模型，以軸承座結(jié)構(gòu)表面振動(dòng)響應(yīng)為邊界條件，研究了正常軸承激勵(lì)下的軸承座表面聲學(xué)量及輻射場(chǎng)點(diǎn)噪聲，，并通過(guò)軸承振動(dòng)和噪聲實(shí)驗(yàn)驗(yàn)證了本文提出的聲振耦合算法； ④運(yùn)用本文提出的軸承聲振耦合新算法，針對(duì)內(nèi)、外圈波紋度對(duì)軸承系統(tǒng)振動(dòng)聲學(xué)特性影響的問(wèn)題，研究了波紋度參數(shù)-波紋度最大幅值和波數(shù)變化對(duì)軸承-軸承座系統(tǒng)的振動(dòng)響應(yīng)和聲學(xué)特征的影響，為軸承的設(shè)計(jì)和制造研究提供了理論依據(jù)。 本文提出的軸承聲振耦合算法可用于預(yù)測(cè)軸承-軸承座系統(tǒng)振動(dòng)聲學(xué)特征，計(jì)算快速、簡(jiǎn)便，效率高，分析獲得的軸承內(nèi)、外圈波紋度參數(shù)變化對(duì)軸承-軸承座系統(tǒng)振動(dòng)聲學(xué)特征影響的結(jié)果，為軸承的設(shè)計(jì)和制造研究提供了理論依據(jù)，具有一定的學(xué)術(shù)意義和重要的工程應(yīng)用價(jià)值。
[Abstract]:Rolling bearing is an important basic mechanical component, which is widely used in modern machine. The running state of bearing plays a very important role in the dynamic performance of the whole mechanical system. The vibration of the bearing not only directly affects the accuracy of the main engine, Moreover, the operating state of the rotor system is affected and the noise emitted will pollute the surrounding environment. With the development of the transmission system towards high reliability and high speed silence, the vibration and noise of the bearing system are demanded more and more. Although modern machining technology and machining precision have been improved obviously, corrugation, as a distributed machining defect of bearings, is still one of the main factors to stimulate the vibration and noise of rolling bearings. In this paper, a new acoustic-vibration coupling algorithm for bearing is proposed, which can be used to predict the acoustic characteristics of bearing bearing bearing seat system, and has the advantage of high calculation efficiency. The influence of the corrugation parameters of outer ring on the vibration acoustics of bearing-bearing bearing seat system is studied. Some valuable conclusions are obtained. The main contents of this paper are as follows:. Based on the relation between Hertz contact theory and bearing kinematics, the nonlinear contact force calculation formula of bearing bearing is derived, and the assumption that the inner surface of bearing seat is considered as a rigid medium layer with small mass and rigid vibration is assumed. The dynamic model of six degrees of freedom rolling bearings is established, which lays a foundation for further dynamic analysis of bearings. (2) the displacement mapping method of the inner surface of the bearing seat is put forward, and the vibration displacement of each component of the bearing system is obtained by using the dynamic model of the rolling bearing with six degrees of freedom, and the displacement mapping method of the inner surface of the bearing seat is used. The coupling of the displacement output of the bearing dynamic model and the displacement excitation input of the finite element model of the bearing seat is realized, which simplifies the coupling calculation and improves the calculation efficiency. (3) the finite element analysis model of bearing-bearing bearing system is established, the vibration response of bearing under normal excitation is studied, the acoustic boundary element analysis model of bearing seat is established, and the vibration response of bearing structure is taken as boundary condition. The acoustics and radiation field noise on the bearing seat surface under normal bearing excitation are studied, and the acousto-vibration coupling algorithm proposed in this paper is verified by the bearing vibration and noise experiments. 4 using the new acoustic-vibration coupling algorithm proposed in this paper, aiming at the influence of corrugation of inner and outer rings on the vibration acoustic characteristics of bearing system, The effects of the maximum corrugation parameter and wavenumber on the vibration response and acoustic characteristics of bearing-bearing bearing bearing system are studied, which provides a theoretical basis for the design and manufacture of bearings. The acousto-vibration coupling algorithm proposed in this paper can be used to predict the vibration acoustic characteristics of bearing-bearing bearing bearing seat system. The calculation is fast, simple and efficient. The effect of the corrugation parameters of outer ring on the vibration acoustic characteristics of bearing-bearing bearing bearing seat system provides a theoretical basis for the research of bearing design and manufacture, and has certain academic significance and important engineering application value.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH133.33

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