本文選題：旋轉(zhuǎn)葉片　切入點(diǎn)：變形　出處：《武漢理工大學(xué)》2011年碩士論文

【摘要】：旋轉(zhuǎn)葉片作為旋轉(zhuǎn)機(jī)械的重要組成部分,其安全性直接影響到旋轉(zhuǎn)機(jī)械的整體安全性,葉片故障所導(dǎo)致的后果往往十分嚴(yán)重,對(duì)葉片工作中的狀態(tài)進(jìn)行監(jiān)測(cè)具有十分重要的意義。葉片的變形是葉片狀態(tài)最直觀的描述,因此對(duì)葉片的變形情況進(jìn)行監(jiān)測(cè)顯得尤為重要。本文的主要研究?jī)?nèi)容之一即為葉片變形監(jiān)測(cè)方法的研究。 光纖光柵傳感技術(shù)是近年來(lái)發(fā)展迅速的一種傳感技術(shù),由于光纖光柵傳感器具有無(wú)源無(wú)電、抗電磁干擾能力強(qiáng)、信號(hào)傳輸距離遠(yuǎn)、能在易燃易爆、灰塵油污等惡劣工作環(huán)境下工作、采用時(shí)分或波分復(fù)用技術(shù)易于實(shí)現(xiàn)大規(guī)模分布式網(wǎng)絡(luò)測(cè)量等諸多優(yōu)點(diǎn),因此在大型機(jī)械裝備狀態(tài)監(jiān)測(cè)中的應(yīng)用前景十分廣闊。而如何將光纖光柵有效應(yīng)用到機(jī)械裝備狀態(tài)監(jiān)測(cè)中,是現(xiàn)在許多研究人員都在研究的熱點(diǎn)問(wèn)題。 結(jié)合以上兩方面問(wèn)題,本文的目的就是研究如何使用光纖光柵來(lái)實(shí)現(xiàn)對(duì)旋轉(zhuǎn)葉片變形的監(jiān)測(cè)。設(shè)計(jì)一種結(jié)構(gòu)、尋求一種方法,將光纖光柵傳感技術(shù)應(yīng)用到旋轉(zhuǎn)葉片變形監(jiān)測(cè)中,為光纖光柵在機(jī)械結(jié)構(gòu)狀態(tài)監(jiān)測(cè)中的應(yīng)用提供一種方法和思路。針對(duì)這一目的,本文所做的主要工作包括： 1.對(duì)葉片結(jié)構(gòu)和工作時(shí)的受力狀態(tài)進(jìn)行了理論分析,研究了葉片變形產(chǎn)生的機(jī)理與葉片變形的主要形式。 2.提出了使用光纖光柵進(jìn)行葉片變形監(jiān)測(cè)的方法,確定了用于測(cè)量變形信號(hào)的傳感器的傳感方法與類型,設(shè)計(jì)出了以光纖光柵為傳感元件的傳感器。這部分工作是本文的重點(diǎn)內(nèi)容。 3.介紹了信號(hào)的分析與處理方法。首先介紹了光纖光柵的解調(diào)方法,然后介紹了信號(hào)的處理方法,包括時(shí)域分析、頻譜分析和小波分析。 4.使用本文中設(shè)計(jì)的傳感器分別進(jìn)行了靜態(tài)實(shí)驗(yàn)、轉(zhuǎn)速測(cè)量實(shí)驗(yàn)和低速下信號(hào)的采集實(shí)驗(yàn),確定了傳感方法的可行性,為后續(xù)高速旋轉(zhuǎn)狀態(tài)下葉片變形的測(cè)量打下基礎(chǔ)。
[Abstract]:As an important part of rotating machinery, the safety of rotating blade directly affects the overall safety of rotating machinery, and the consequences of blade failure are often very serious.It is very important to monitor the working condition of blade.The deformation of blade is the most intuitionistic description of blade state, so it is very important to monitor the deformation of blade.One of the main contents of this paper is the research of blade deformation monitoring method.Fiber Bragg grating (FBG) sensing technology is a kind of sensing technology developed rapidly in recent years. Because of its passive electricity, strong anti-electromagnetic interference ability, long signal transmission distance, FBG sensor can be flammable and explosive.Under the bad working environment such as dust and oil pollution, it is easy to realize large-scale distributed network measurement by using time division multiplexing (TDM) technology and so on. Therefore, the application prospect in condition monitoring of large-scale mechanical equipment is very broad.How to effectively apply fiber Bragg grating (FBG) to state monitoring of mechanical equipment is a hot issue for many researchers.Combined with the above two problems, the purpose of this paper is to study how to use fiber Bragg grating to monitor the deformation of rotating blade.A structure is designed and a method is sought to apply fiber Bragg grating sensing technology to the deformation monitoring of rotating blades, which provides a method and train of thought for the application of fiber Bragg grating in the monitoring of mechanical structure.For this purpose, the main work done in this paper includes:1.The mechanism of blade deformation and the main forms of blade deformation are studied in this paper.2.A method of blade deformation monitoring using fiber Bragg grating (FBG) is proposed. The sensor method and type of sensor used to measure deformation signal are determined. A sensor based on FBG is designed.This part of the work is the focus of this paper.3.The method of signal analysis and processing is introduced.First, the demodulation method of fiber grating is introduced, and then the signal processing method is introduced, including time domain analysis, spectrum analysis and wavelet analysis.4.Using the sensor designed in this paper, the static experiment, the speed measurement experiment and the signal acquisition experiment at low speed are carried out respectively, and the feasibility of the sensing method is determined, which lays the foundation for the subsequent measurement of blade deformation under the condition of high speed rotation.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH165.3

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 賈浪;基于光纖光柵磁耦合傳感器的葉尖定時(shí)法振動(dòng)監(jiān)測(cè)的研究[D];武漢理工大學(xué);2012年

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本文編號(hào)：1718776