本文選題：動態(tài)特性　切入點(diǎn)：增速器　出處：《哈爾濱工程大學(xué)》2011年碩士論文　論文類型：學(xué)位論文

【摘要】：齒輪增速器是一種高轉(zhuǎn)速運(yùn)轉(zhuǎn)的機(jī)械設(shè)備,在高速旋轉(zhuǎn)工況下增速器產(chǎn)生激勵頻率的范圍較寬。隨著科學(xué)技術(shù)的快速發(fā)展,齒輪增速器的振動問題日益受到人們的重視,作為試驗(yàn)臺上重要的動力傳遞裝置其振動特性好壞將直接決定整個試驗(yàn)平臺的工作性能。因此,對增速器系統(tǒng)進(jìn)行振動特性研究具有重要的實(shí)際意義。 機(jī)械設(shè)備計算模型的正確性是數(shù)值模擬得到正確計算結(jié)果的前提條件,本文首先基于有限元法建立了增速器箱體的有限元模型,并采用自由模態(tài)分析方法對所建立模型的有效性進(jìn)行驗(yàn)證,為后續(xù)的計算分析提供基礎(chǔ)。根據(jù)模態(tài)分析理論對增速器箱體進(jìn)行模態(tài)分析,確定箱體結(jié)構(gòu)的固有頻率及其振型,并對箱體的動態(tài)特性進(jìn)行詳細(xì)分析。根據(jù)機(jī)械振動理論,建立了增速器多自由度系統(tǒng)的振動微分方程,推導(dǎo)了多自由度系統(tǒng)振動響應(yīng)的計算公式,提出通過修改模態(tài)參數(shù)來改善結(jié)構(gòu)的振動特性的方法,并在此基礎(chǔ)上對增速器箱體結(jié)構(gòu)模態(tài)參數(shù)的影響因素展開了相關(guān)研究,對增速器箱體的結(jié)構(gòu)動態(tài)性進(jìn)行理論分析,驗(yàn)證增速器箱體設(shè)計的合理性。為了進(jìn)一步驗(yàn)證箱體結(jié)構(gòu)的合理性,設(shè)計了試驗(yàn)系統(tǒng)、試驗(yàn)平臺及試驗(yàn)方案,對增速器系統(tǒng)進(jìn)行空負(fù)荷全轉(zhuǎn)速振動試驗(yàn),通過對振動測試數(shù)據(jù)進(jìn)行處理分析來驗(yàn)證箱體結(jié)構(gòu)的合理性。在增速器箱體動態(tài)特性分析與試驗(yàn)研究的基礎(chǔ)上對箱體結(jié)構(gòu)進(jìn)行改進(jìn)設(shè)計,通過方案設(shè)計與尺寸優(yōu)化相結(jié)合的方法來獲取增速器箱體的最優(yōu)結(jié)構(gòu)方案。 本文的研究為增速器系統(tǒng)結(jié)構(gòu)的動態(tài)設(shè)計及改進(jìn)設(shè)計提供了理論依據(jù)。同時,也可以為后續(xù)齒輪箱的結(jié)構(gòu)設(shè)計提供一定的參考依據(jù)。
[Abstract]:Gear speeder is a kind of mechanical equipment with high rotating speed, which has a wide range of excitation frequency under high-speed rotating condition. With the rapid development of science and technology, people pay more and more attention to the vibration of gear accelerator. As an important power transfer device on the test bench, the vibration characteristics of the whole test platform will be directly determined, so it is of great practical significance to study the vibration characteristics of the accelerator system. The correctness of the calculation model of mechanical equipment is the precondition for the numerical simulation to get the correct result. Firstly, based on the finite element method, the finite element model of the accelerator box is established. The validity of the established model is verified by the free mode analysis method, which provides the basis for the subsequent calculation and analysis. According to the modal analysis theory, the modal analysis of the accelerator box is carried out, and the natural frequency and the mode shape of the box structure are determined. According to the theory of mechanical vibration, the differential equation of vibration of multi-degree-of-freedom system of accelerator is established, and the formula of vibration response of multi-degree-of-freedom system is deduced. This paper proposes a method to improve the vibration characteristics of the structure by modifying the modal parameters. On this basis, the influencing factors of the modal parameters of the accelerator box are studied, and the dynamic characteristics of the structure of the accelerator box are analyzed theoretically. In order to further verify the rationality of the box structure, a test system, a test platform and a test scheme are designed. The rationality of the box structure is verified by processing and analyzing the vibration test data. On the basis of the dynamic characteristic analysis and experimental study of the accelerator box, the design of the box structure is improved. The optimal structural scheme of the accelerator box is obtained by the combination of scheme design and dimension optimization. The research in this paper provides a theoretical basis for the dynamic design and improvement of the structure of the accelerator system, and also provides a certain reference for the structural design of the subsequent gearbox.
【學(xué)位授予單位】：哈爾濱工程大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH132.46

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本文編號：1589337