本文關(guān)鍵詞： 聲學模擬 氣流脈動 管道振動 赫姆霍茲共鳴器 DSPS系統(tǒng)　出處：《蘭州交通大學》2014年碩士論文　論文類型：學位論文

【摘要】：本文主要研究了氣柱固有頻率、管道結(jié)構(gòu)固有頻率對壓縮機管道系統(tǒng)脈動的影響，同時分析了赫姆霍茲共鳴器對氣柱固有頻率的影響以及不同約束點對結(jié)構(gòu)固有頻率的影響。利用平面波動理論，推導出氣柱固有頻率的有限元剛度矩陣方程，采用模態(tài)分析法中的非對稱計算方法對復(fù)雜管道氣柱固有頻率進行數(shù)值計算，并且利用聲學振動模擬試驗，對計算結(jié)果進行驗證。同時，利用子空間迭代法計算了管道結(jié)構(gòu)固有頻率，并且在實驗現(xiàn)場利用DSPS實驗測試系統(tǒng)測量了管道的結(jié)構(gòu)固有頻率值，對子空間迭代法的計算結(jié)果也進行了驗證。 本文利用經(jīng)典波動理論，建立起氣柱固有頻率的有限元剛度矩陣方程，通過有限元軟件建立起復(fù)雜管道的氣柱模型，應(yīng)用聲學模態(tài)分析法進行模擬計算，獲得了管道的氣柱固有頻率。并且針對壓縮機管道系統(tǒng)的產(chǎn)生根源氣流脈動，著重分析了赫姆霍茲共鳴器的減震作用。 本文針對往復(fù)式壓縮機的氣流脈動產(chǎn)生機理，對赫姆霍茲共鳴器對氣流脈動的消減作用進行了探究，并且對于赫姆霍茲共鳴器對管道氣流脈動消減效果進行了計算機模擬，肯定了赫姆霍茲共鳴器對壓縮機閥腔內(nèi)的氣流脈動具有衰減作用。實驗結(jié)果表明：赫姆霍茲共鳴器對壓縮機閥腔內(nèi)的衰減效果比較好，而對緩沖罐以后的管道排氣系統(tǒng)的氣流脈動衰減效果不再明顯。 文中對往復(fù)壓縮機的管道結(jié)構(gòu)固有頻率采用了子空間迭代法進行了模擬分析與計算，采用DSPS系統(tǒng)進行了壓縮機管道的現(xiàn)場實驗結(jié)果測試，并對模擬計算值進行了驗證。實驗結(jié)果表明：不同約束點對管道的結(jié)構(gòu)固有頻率具有重要影響，改變管道的約束，可以有效調(diào)節(jié)結(jié)構(gòu)固有頻率值，從而有效避開壓縮機的激發(fā)頻率，避免管道共振的發(fā)生。 通過本文的研究，驗證了非對稱計算法對氣柱固有頻率計算的可靠性，以及子空間迭代法計算管道結(jié)構(gòu)固有頻率的有效性。實驗結(jié)果表明了聲學模擬對于氣柱固有頻率具有可操作性，并且DSPS系統(tǒng)對于現(xiàn)場測試結(jié)構(gòu)固有頻率值具有實用性。因此，利用聲學模擬及DSPS測試系統(tǒng)，，可以很好的獲得氣柱固有頻率值及管道結(jié)構(gòu)固有頻率值，從而為壓縮機管道系統(tǒng)的設(shè)計，提供了一定的理論基礎(chǔ)。
[Abstract]:In this paper, the influence of the natural frequency of the gas column and the natural frequency of the pipeline structure on the pulsation of the compressor pipeline system is studied. At the same time, the influence of the Hem Hortz resonator on the natural frequency of the gas column and the influence of different restraint points on the natural frequency of the structure are analyzed. The finite element stiffness matrix equation of the natural frequency of the gas column is derived by using the plane wave theory. The unsymmetrical calculation method in modal analysis is used to numerically calculate the natural frequency of gas column in complex pipeline, and the acoustic vibration simulation test is used to verify the calculated results. The natural frequency of pipeline structure is calculated by subspace iteration method, and the natural frequency of pipeline structure is measured by DSPS test system. The results of subspace iteration method are also verified. In this paper, the finite element stiffness matrix equation of natural frequency of gas column is established by using classical wave theory, and the gas column model of complex pipeline is established by finite element software, and the simulation calculation is carried out by means of acoustic modal analysis method. The natural frequency of the gas column of the pipeline is obtained, and the vibration absorption of the Hem Hortz resonator is emphatically analyzed in view of the source flow pulsation of the pipeline system of the compressor. In this paper, the mechanism of air pulsation in reciprocating compressor is studied, and the effect of Hem Hortz resonator on air pulsation is studied, and the effect of Hem Hortz resonator on the reduction of pipeline airflow pulsation is simulated by computer. It is affirmed that Hem Hortz resonator can attenuate the flow pulsation in the compressor valve cavity. The experimental results show that Hem Hortz resonator has a better attenuation effect on the compressor valve cavity. However, the attenuation effect of air pulsation on the pipe exhaust system after the buffer tank is no longer obvious. In this paper, the natural frequency of pipeline structure of reciprocating compressor is simulated and analyzed by subspace iteration method, and the field experiment result of compressor pipeline is tested by DSPS system. The experimental results show that the different constraint points have an important effect on the natural frequency of the pipeline structure. Changing the constraints of the pipeline can effectively adjust the natural frequency value of the structure. Thus effectively avoid the excitation frequency of the compressor and avoid the occurrence of pipeline resonance. Through the research in this paper, the reliability of the asymmetric calculation method for calculating the natural frequency of the gas column is verified. The experimental results show that the acoustic simulation is feasible for the natural frequency of the gas column, and the DSPS system is practical for the in-situ testing of the natural frequency of the structure. By using the acoustic simulation and DSPS test system, the natural frequency value of the gas column and the natural frequency value of the pipeline structure can be obtained well, which provides a certain theoretical basis for the design of the compressor pipeline system.
【學位授予單位】：蘭州交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TH45

【相似文獻】

相關(guān)期刊論文 前10條

1 張傳鑫;張衛(wèi)義;孫笠峰;涂俊;任園;;氣流脈動的分析與消減[J];壓縮機技術(shù);2014年04期

2 宋樹廉;聲學干涉現(xiàn)象對管道氣流脈動的影響[J];流體工程;1984年09期

3 倫亦云;發(fā)動機和尾噴管匹配引起的跨音振動[J];航空動力學報;1987年02期

4 苗同臣;王偉;;壓縮機管道系統(tǒng)氣流脈動的計算[J];河南科學;1995年S1期

5 項坤;王龍;馬屈楊;楊國安;;基于氣流脈動抑制的管道減振技術(shù)研究[J];設(shè)備管理與維修;2014年S1期

6 孫樹福;郭文濤;;往復(fù)機氣流脈動和管線振動的分析與控制技術(shù)[J];壓縮機技術(shù);2011年06期

7 孫嗣瑩,夏永源,李錦臨;緩沖器位置對管道內(nèi)氣流脈動的影響[J];壓縮機技術(shù);1980年02期

8 黨錫淇,夏永源,林克寶,陳殿云;消除管道振動的一種簡易方法——用支管降低主管內(nèi)的氣流脈動[J];噪聲與振動控制;1983年03期

9 陳玲莉,黃幼玲;離心式風機系統(tǒng)離散頻率氣流脈動特性的研究[J];流體工程;1991年08期

10 鄒振才;消減空壓機氣流脈動方法的探討[J];冶金動力;1997年03期

相關(guān)會議論文 前3條

1 郭文濤;劉守信;;往復(fù)機氣流脈動和管線振動的分析與控制技術(shù)[A];第九屆沈陽科學學術(shù)年會論文集（信息科學與工程技術(shù)分冊）[C];2012年

2 魯錄義;顧兆林;何家勝;;在壓縮機振動控制中運用ANSYS多物理場[A];第九屆全國振動理論及應(yīng)用學術(shù)會議論文摘要集[C];2007年

3 魯錄義;顧兆林;何家勝;;在壓縮機振動控制中運用ANSYS多物理場[A];第九屆全國振動理論及應(yīng)用學術(shù)會議論文集[C];2007年

相關(guān)碩士學位論文 前3條

1 邱江;礦用空壓機氣流脈動對設(shè)備運行效率及其可靠性研究[D];遼寧工程技術(shù)大學;2001年

2 肖正華;往復(fù)式壓縮機管系振動與氣流脈動的模擬分析及實驗研究[D];蘭州交通大學;2014年

3 李智寶;羅茨機械增壓器氣流脈動及其消減方法的研究[D];中南大學;2014年

本文編號：1552425