本文選題：液壓系統(tǒng) + 壓力脈動��； 參考：《長沙理工大學》2012年碩士論文

【摘要】：在液壓系統(tǒng)中，由于液壓泵是利用容積變化、交替地排出液壓油來工作的，其輸出的瞬時流量是具有周期性的脈動流量。當這一脈動流量遇到系統(tǒng)阻抗后就產生了周期性的壓力脈動，并沿管路傳播，產生振動和噪聲。抑制液壓系統(tǒng)的壓力脈動對提高系統(tǒng)的可靠性和工作質量，對提高液壓元件的壽命，降低系統(tǒng)的噪聲都有重要的意義。液壓系統(tǒng)的流體脈動控制一直是一個沒有得到很好解決的技術難題。在液壓系統(tǒng)中安裝濾波器對流體脈動的衰減能起到很好的效果。本文提出了一種結構簡單、靈巧的機械諧振機構，膜片振動式流體濾波器。具體研究內容包括： 1．提出一種膜片振動式流體濾波器結構。分析了液壓系統(tǒng)壓力脈動特性；基于動力吸振器的作用機理，設計一種結構簡單、靈巧的機械諧振機構。對濾波器的結構進行初步設計。 2．建立了預拉伸柔性膜片振動的數(shù)學模型，并求解了柔性膜的固有頻率。使用超彈性膜理論求解了預拉伸柔性膜片的固有頻率；利用有限元分析軟件ADINA，對預拉伸柔性膜片模型進行流固耦合模態(tài)分析，研究柔性膜片的流固耦合動態(tài)特性，為濾波器的設計提供依據(jù)。 3．使用計算流體力學方法對該流體濾波器的衰減特性進行仿真分析。通過對濾波器模型進行簡化，并設置相關仿真參數(shù)，對模型進行瞬態(tài)動力學分析。研究濾波器頻率特性和衰減特性。 4．通過實驗測試膜片式流體濾波器的衰減特性。建立了液壓振動試驗臺，研制了膜片式濾波器實驗樣機，，對濾波器的衰減特性進行實驗。并與仿真結果進行對比分析，說明仿真分析的正確性。
[Abstract]:In the hydraulic system, because the hydraulic pump uses the volume change, the hydraulic oil is discharged alternately to work, the instantaneous flow rate of its output is periodic pulsating flow rate. When this pulsating flow rate meets the impedance of the system, it produces periodic pressure pulsation, which propagates along the pipeline, resulting in vibration and noise. It is very important to restrain the pressure pulsation of hydraulic system to improve the reliability and working quality of the system, to improve the life of hydraulic components and to reduce the noise of the system. The control of fluid pulsation in hydraulic system has been a technical problem which has not been solved well. The filter installed in hydraulic system has a good effect on the attenuation of fluid pulsation. In this paper, a simple and dexterous mechanical resonance mechanism, diaphragm vibrating fluid filter, is presented. Specific studies include: 1. A diaphragm vibrating fluid filter structure is proposed. The pressure pulsation characteristics of hydraulic system are analyzed and a simple and dexterous mechanical resonance mechanism is designed based on the mechanism of dynamic vibration absorber. The structure of the filter is preliminarily designed. 2. The mathematical model of the vibration of pretension flexible membrane is established, and the natural frequency of the flexible film is solved. The natural frequency of pretension flexible membrane is solved by using hyperelastic membrane theory, and the fluid-solid coupling modal analysis of pretension flexible membrane model is carried out by using finite element analysis software Adina, and the dynamic characteristics of fluid-structure coupling of flexible membrane are studied. It provides the basis for the design of filter. 3. The attenuation characteristics of the fluid filter are simulated by computational fluid dynamics (CFD) method. By simplifying the filter model and setting the relevant simulation parameters, the transient dynamics of the model is analyzed. The frequency and attenuation characteristics of the filter are studied. 4. The attenuation characteristics of diaphragm fluid filter are measured experimentally. The hydraulic vibration test rig was established and the experimental prototype of the diaphragm filter was developed. The attenuation characteristics of the filter were tested. The simulation results are compared with the simulation results to show the correctness of the simulation analysis.
【學位授予單位】：長沙理工大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH137.7

【引證文獻】

相關碩士學位論文 前1條

1 賀華波;多薄板振動式流體脈動衰減器仿真及實驗研究[D];長沙理工大學;2013年

本文編號：1825016