400四拐曲軸扭振分析研究
發(fā)布時(shí)間：2018-09-07 07:49
【摘要】：壓縮機(jī)制造業(yè)日益發(fā)展的新技術(shù)在逐漸滿足了低能耗、低排放、低噪聲目標(biāo)的同時(shí)，也對壓縮機(jī)結(jié)構(gòu)可靠性設(shè)計(jì)和振動(dòng)控制提出了更高的要求。伴隨這一發(fā)展趨勢，內(nèi)燃機(jī)的軸系扭振問題也日益凸現(xiàn)出來。其中曲軸是壓縮機(jī)中最重要的部件，也是受力最復(fù)雜的部件，同時(shí)也影響壓縮機(jī)的可靠性與壽命。隨著壓縮機(jī)技術(shù)的不斷完善和發(fā)展，曲軸的工作條件也愈加苛刻，對曲軸的強(qiáng)度提出了更高的要求。在這一背景下，追求扭振理論的進(jìn)一步完善，尋求新的扭振解決方案勢在必行。本文總結(jié)了一些前人計(jì)算軸系扭振的方法，以有限元思想作指導(dǎo)，運(yùn)用系統(tǒng)矩陣法對復(fù)雜軸系進(jìn)行扭振計(jì)算、分析，獲得機(jī)組軸系的扭振特性和穩(wěn)態(tài)動(dòng)力響應(yīng)。本文主要工作是壓縮機(jī)軸系三維建模、軸系固有頻率分析、軸系在簡諧力作用下的靜動(dòng)強(qiáng)度分析、軸系的穩(wěn)態(tài)動(dòng)態(tài)振動(dòng)特性分析及結(jié)構(gòu)優(yōu)化等幾方面來展開的，主要內(nèi)容包括： （1）以遠(yuǎn)大壓縮機(jī)有限公司4M80型壓縮機(jī)作為研究對象。首先利用三維建模軟件PROE對其進(jìn)行零件的建模與裝配。隨后將三維模型導(dǎo)入軟件ANSYSWORKBENCH中施加邊界條件對其進(jìn)行相應(yīng)的靜力結(jié)構(gòu)分析、模態(tài)分析等。 （2）對壓縮機(jī)曲軸系模型進(jìn)行固有頻率及主振型分析。將各曲拐上的激勵(lì)載荷——?dú)怏w力和慣性力產(chǎn)生的干擾力矩進(jìn)行簡諧分析，進(jìn)行軸系的強(qiáng)迫振動(dòng)計(jì)算，從而得到軸系的動(dòng)態(tài)振動(dòng)特性。 （3）根據(jù)所得到的軸系穩(wěn)態(tài)動(dòng)態(tài)振動(dòng)特性，，并結(jié)合材料強(qiáng)度全面評定整個(gè)軸系工作的可靠性，采取避振減振措施來避免軸系的振動(dòng)問題。 通過上述工作及其結(jié)果能夠分析和預(yù)測實(shí)際壓縮機(jī)軸系扭轉(zhuǎn)振動(dòng)的情況。并且運(yùn)用ANSYS WORKBENCH軟件能夠方便地對各種工況進(jìn)行模擬，非常適合工程上對于壓縮機(jī)的研究和開發(fā)。
[Abstract]:The new technology of compressor manufacturing industry has gradually met the requirements of low energy consumption, low emission and low noise, but also put forward higher requirements for the structural reliability design and vibration control of compressors. Along with this development trend, the torsional vibration problem of internal combustion engine shafting has become increasingly prominent. The crankshaft is the most important part of compressor and the most complicated part, and it also affects the reliability and life of compressor. With the continuous improvement and development of compressor technology, the working conditions of crankshaft are becoming more and more harsh, which puts forward higher requirements for the strength of crankshaft. Under this background, it is imperative to pursue the further improvement of torsional vibration theory and seek a new solution to torsional vibration. In this paper, some previous methods for calculating torsional vibration of shafting are summarized. Under the guidance of finite element method, the torsional vibration of complex shafting is calculated by system matrix method, and the torsional vibration characteristics and steady-state dynamic response of shafting are obtained. The main work of this paper is three dimensional modeling of compressor shafting, analysis of natural frequency of shafting, static and dynamic strength analysis of shafting under simple harmonic force, analysis of steady state and dynamic vibration characteristics of shafting and structural optimization, etc. The main contents are as follows: (1) take the 4M80 compressor of Great Compressor Co., Ltd as the research object. Firstly, three-dimensional modeling software PROE is used to model and assemble the parts. Then the 3D model is introduced into the software ANSYSWORKBENCH to carry on the corresponding static structure analysis, modal analysis and so on. (2) the natural frequency and the main mode of the compressor crankshaft system model are analyzed. The excitation load-air force and the disturbance torque caused by inertia force are analyzed harmonically, and the forced vibration of shafting is calculated. Thus the dynamic vibration characteristics of the shafting are obtained. (3) according to the obtained steady state dynamic vibration characteristics of the shafting and the reliability of the whole shafting work is comprehensively evaluated combining with the strength of the material, the vibration damping measures are taken to avoid the vibration problem of the shafting. Through the above work and its results, the torsional vibration of the actual compressor shafting can be analyzed and predicted. And the ANSYS WORKBENCH software can be used to simulate various working conditions conveniently, which is very suitable for the research and development of compressors in engineering.
【學(xué)位授予單位】：沈陽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TH45;TH113.1
本文編號：2227654
[Abstract]:The new technology of compressor manufacturing industry has gradually met the requirements of low energy consumption, low emission and low noise, but also put forward higher requirements for the structural reliability design and vibration control of compressors. Along with this development trend, the torsional vibration problem of internal combustion engine shafting has become increasingly prominent. The crankshaft is the most important part of compressor and the most complicated part, and it also affects the reliability and life of compressor. With the continuous improvement and development of compressor technology, the working conditions of crankshaft are becoming more and more harsh, which puts forward higher requirements for the strength of crankshaft. Under this background, it is imperative to pursue the further improvement of torsional vibration theory and seek a new solution to torsional vibration. In this paper, some previous methods for calculating torsional vibration of shafting are summarized. Under the guidance of finite element method, the torsional vibration of complex shafting is calculated by system matrix method, and the torsional vibration characteristics and steady-state dynamic response of shafting are obtained. The main work of this paper is three dimensional modeling of compressor shafting, analysis of natural frequency of shafting, static and dynamic strength analysis of shafting under simple harmonic force, analysis of steady state and dynamic vibration characteristics of shafting and structural optimization, etc. The main contents are as follows: (1) take the 4M80 compressor of Great Compressor Co., Ltd as the research object. Firstly, three-dimensional modeling software PROE is used to model and assemble the parts. Then the 3D model is introduced into the software ANSYSWORKBENCH to carry on the corresponding static structure analysis, modal analysis and so on. (2) the natural frequency and the main mode of the compressor crankshaft system model are analyzed. The excitation load-air force and the disturbance torque caused by inertia force are analyzed harmonically, and the forced vibration of shafting is calculated. Thus the dynamic vibration characteristics of the shafting are obtained. (3) according to the obtained steady state dynamic vibration characteristics of the shafting and the reliability of the whole shafting work is comprehensively evaluated combining with the strength of the material, the vibration damping measures are taken to avoid the vibration problem of the shafting. Through the above work and its results, the torsional vibration of the actual compressor shafting can be analyzed and predicted. And the ANSYS WORKBENCH software can be used to simulate various working conditions conveniently, which is very suitable for the research and development of compressors in engineering.
【學(xué)位授予單位】：沈陽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TH45;TH113.1
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本文編號：2227654
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