本文關(guān)鍵詞：滾動(dòng)軸承非線性接觸噪聲分析　出處：《太原科技大學(xué)》2011年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 滾動(dòng)軸承 非線性振動(dòng) 噪聲 數(shù)值分析

【摘要】：滾動(dòng)軸承是應(yīng)用最為廣泛的的精密機(jī)械零件,被譽(yù)為工業(yè)的關(guān)節(jié)。隨著滾動(dòng)軸承振動(dòng)與噪聲對(duì)環(huán)境的污染和靜音機(jī)械技術(shù)的迅猛發(fā)展及其產(chǎn)品的不斷涌現(xiàn),工作主機(jī)對(duì)滾動(dòng)軸承的噪聲性能指標(biāo)要求越來(lái)越高,盡快尋找出軸承噪聲機(jī)理已成為當(dāng)務(wù)之急。由于滾動(dòng)軸承噪聲機(jī)理極其復(fù)雜,在研究其特性時(shí)往往為了線性的計(jì)算方便忽略了許多非線性因素,使得滾動(dòng)軸承噪聲機(jī)理仍是公認(rèn)的尚不成熟的軸承基礎(chǔ)理論之一。本文從聲學(xué)角度入手,重點(diǎn)考慮了滾動(dòng)軸承結(jié)構(gòu)的非線性接觸,對(duì)深溝球軸承的噪聲機(jī)理進(jìn)行了分析研究,其內(nèi)容主要包括以下四方面: 1.以固體接觸力學(xué)為基礎(chǔ),應(yīng)用非線性動(dòng)力學(xué)理論對(duì)深溝球軸承建立了振動(dòng)模型,并利用聲學(xué)理論和結(jié)構(gòu)聲學(xué)與聲輻射相關(guān)知識(shí),構(gòu)造出了深溝球軸承的耦合噪聲模型。 2.運(yùn)用matllab數(shù)學(xué)計(jì)算軟件,通過(guò)數(shù)值分析的方法,對(duì)影響深溝球軸承噪聲的不同物理參數(shù)進(jìn)行了研究,著重分析了不同轉(zhuǎn)速下軸承滾道、滾動(dòng)體的振動(dòng)速度和振動(dòng)加速度與噪聲聲壓級(jí)之間的關(guān)系;針對(duì)深溝球軸承表面缺陷,分析了波紋度的波數(shù)、損傷尺寸等參數(shù)與噪聲之間的關(guān)系。 3.根據(jù)非線性系統(tǒng)自適應(yīng)控制理論對(duì)深溝球軸承振動(dòng)與噪聲進(jìn)行了有效地控制,使?jié)L動(dòng)軸承從受外界干擾情況下,自適應(yīng)地返回穩(wěn)定工作狀態(tài)。 4.結(jié)合基于模擬退火的微粒群算法對(duì)深溝球軸承的噪聲進(jìn)行了優(yōu)化,與原始設(shè)計(jì)相比聲壓級(jí)降低了13.3%,取得了明顯的效果。 本文為滾動(dòng)軸承振動(dòng)與噪聲機(jī)理的研究開(kāi)辟了一條新的思路,提供了一種新的方法。為突破滾動(dòng)軸承低噪聲技術(shù)瓶頸奠定了夯實(shí)的理論基礎(chǔ),對(duì)于軸承行業(yè)減振降噪的發(fā)展起到了重要的推動(dòng)作用和借鑒意義。
[Abstract]:The rolling bearing is the most widely used precision machinery parts, known as the industrial joint. With the rapid development and rolling bearing vibration and noise pollution to the environment and mute mechanical technology continue to emerge, the host of the work index of noise performance of rolling bearings are increasingly demanding, as soon as possible to find out the mechanism of bearing noise has become a pressing matter of the moment. As a result of the rolling bearing noise mechanism is extremely complex, in the study of its characteristics are often in order to calculate conveniently ignores many nonlinear factors, one of which is still recognized as the rolling bearing noise mechanism is still not mature. This paper from the basic theory of bearing acoustic perspective, focus on the bearing structure of the nonlinear contact, noise mechanism the deep groove ball bearing is analyzed, the main contents include the following four aspects:
1., based on the solid contact mechanics and the nonlinear dynamics theory, a vibration model of deep groove ball bearings is established. Based on the knowledge of acoustic theory and structural acoustics and radiation, a coupled noise model of deep groove ball bearings is constructed.
2. using the matllab mathematical calculation software, through numerical analysis method, the effects of different physical parameters of deep groove ball bearing noise is studied, emphatically analyzes the different speed of bearing raceway, the relationship between rolling vibration velocity and vibration acceleration and noise level; for deep groove ball bearing surface defects, analysis of the wave number of wave the relationship between the damage parameters such as size and noise.
3., according to the adaptive control theory of nonlinear system, the vibration and noise of deep groove ball bearings are effectively controlled, enabling rolling bearings to return to stable working state adaptively under external interference.
4., combined with simulated annealing, particle swarm optimization algorithm is used to optimize the noise of deep groove ball bearings. Compared with the original design, the sound pressure level is reduced by 13.3%, which has achieved obvious results.
This paper provides a new way for the research of rolling bearing vibration and noise mechanism, provides a new method. Lays a solid theoretical foundation for the breakthrough of rolling bearing technology bottleneck for the development of low noise, vibration and noise reduction of the bearing industry has played an important role and significance.

【學(xué)位授予單位】：太原科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類(lèi)號(hào)】：TH133.33;TB535

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本文編號(hào)：1378243