本文關(guān)鍵詞：壓力機液壓系統(tǒng)中振動噪聲的分析與控制　出處：《武漢理工大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 振動 噪聲 分析 控制 模擬仿真

【摘要】：傳統(tǒng)的產(chǎn)品設(shè)計方法對機械的性能和外觀等方面考慮較多,忽略了產(chǎn)品產(chǎn)生振動噪聲的問題。產(chǎn)品投入使用后,噪聲問題突出,嚴(yán)重影響了操作人員的身心健康,導(dǎo)致生產(chǎn)效率低下,事故率較高；設(shè)備振動問題也會造成產(chǎn)品使用壽命降低,故障率攀開。另外,國家對產(chǎn)品噪聲問題也越來越重視,倡議產(chǎn)品的綠色設(shè)計和和諧設(shè)計。在國家的相關(guān)法規(guī)中也對產(chǎn)品的噪聲分貝值進行了限制要求,旨在保護使用者免遭較大噪聲的困擾。因此,本文以壓力機液壓系統(tǒng)為主要研究對象,利用有限元軟件模擬仿真和噪聲測量儀器實測相結(jié)合,識別設(shè)備結(jié)構(gòu)的主要振動噪聲源,對其結(jié)構(gòu)進行優(yōu)化改進,然后通過儀器檢測驗證結(jié)構(gòu)改進是否合理,從而得到一種改進優(yōu)化的方法。 本文的主要工作及成果包括以下幾點： (1)液壓系統(tǒng)振動噪聲分析。本文從壓力機液壓系統(tǒng)的設(shè)計開始,選擇合適的液壓元器件。同時,分別對液壓系統(tǒng)中液壓油缸、液壓泵站和聯(lián)接油管導(dǎo)致振動噪聲的原因進行了分析,提出了解決方案和措施,避免因液壓系統(tǒng)不合理的設(shè)計導(dǎo)致較大的噪聲產(chǎn)生,為液壓系統(tǒng)的設(shè)計人員提供了參考價值。 (2)液壓系統(tǒng)振動噪聲的識別和測量。論述了機械振動噪聲的識別和測量的基本理論和檢測方法,利用噪聲測量儀器,采用近場測量和選擇運行相結(jié)合的方法,完成了液壓系統(tǒng)噪聲的識別和測量,分析了設(shè)備產(chǎn)生較高振動噪聲的原因。 (3)對液壓站有限元仿真分析。運用有限元仿真軟件,對液壓站的結(jié)構(gòu)進行結(jié)構(gòu)模態(tài)分析、動態(tài)諧響應(yīng)分析和聲學(xué)模態(tài)分析等,分析得出液壓站在不同頻率范圍下振動強烈的部件及對外輻射聲壓級分布情況,為液壓站結(jié)構(gòu)改進提供了理論依據(jù)。同時,對進油管改進前后的聲學(xué)仿真數(shù)據(jù)對比分析,得出改進后的進油管降噪效果較好。在實際應(yīng)用中,使用噪聲測量儀器實測后,確實有較好的降噪效果,很好的驗證了軟件模擬分析得到的結(jié)論。 基于上面的研究結(jié)果,分析得到了造成設(shè)備噪聲較高的主要原因以及相應(yīng)的改進措施。并且利用軟件的模擬仿真分析進行結(jié)構(gòu)改進優(yōu)化,再通過儀器測量進行驗證,為設(shè)備減振降噪提供了一種分析思路,具有一定的指導(dǎo)和使用價值。
[Abstract]:The traditional product design method considers the performance and appearance of machinery more, neglecting the problem of vibration and noise produced by the product. After the product is put into use, the problem of noise is prominent. Seriously affected the physical and mental health of the operator, resulting in low production efficiency, high accident rate; Equipment vibration will also lead to lower service life and failure rate. In addition, the country is paying more and more attention to the problem of product noise. Green design and harmonious design of products. In the relevant national laws and regulations, the noise decibel value of the product is also restricted, in order to protect users from the problem of greater noise. Therefore. In this paper, the hydraulic system of the press as the main research object, using the finite element software simulation and noise measurement instrument combined to identify the main vibration and noise sources of the equipment structure, optimize and improve its structure. Then, an improved optimization method is obtained by means of instrument testing to verify whether the structural improvement is reasonable or not. The main work and results of this paper include the following: 1) Vibration and noise analysis of hydraulic system. Starting with the design of hydraulic system of press, this paper selects suitable hydraulic components. At the same time, the hydraulic cylinder in hydraulic system is analyzed separately. The causes of vibration and noise caused by hydraulic pump station and connecting tubing are analyzed, and the solutions and measures are put forward to avoid large noise caused by unreasonable design of hydraulic system. It provides reference value for the designers of hydraulic system. Identification and measurement of vibration and noise in hydraulic system. The basic theory and detection method of recognition and measurement of mechanical vibration and noise are discussed, and the noise measuring instrument is used. The identification and measurement of hydraulic system noise is accomplished by combining near-field measurement and selective operation, and the causes of high vibration noise of the equipment are analyzed. 3) finite element simulation analysis of hydraulic station. The structural modal analysis, dynamic harmonic response analysis and acoustic modal analysis of hydraulic station structure are carried out by using finite element simulation software. Analysis of the hydraulic station in the different frequency range of strong vibration components and external radiation sound pressure level distribution provides a theoretical basis for the improvement of the hydraulic station structure at the same time. Comparing and analyzing the acoustic simulation data before and after the improvement of the oil intake pipe, it is concluded that the improved oil intake pipe has better noise reduction effect. In practical application, the noise measurement instrument is used to measure the actual measurement, and it does have a better noise reduction effect. The conclusion of software simulation analysis is well verified. Based on the above research results, the main reasons for the high noise of the equipment and the corresponding improvement measures are obtained, and the simulation analysis of the software is used to optimize the structure. Then it is verified by instrument measurement, which provides a kind of analysis thought for the equipment vibration and noise reduction, and has certain guidance and application value.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TG305;TH137

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本文編號：1412268