管道彎頭對低頻縱向?qū)Р▊鞑ヌ匦杂绊懛治?/H1>
發(fā)布時(shí)間：2018-05-19 10:44
本文選題：導(dǎo)波 + 模態(tài)變換 ； 參考：《聲學(xué)學(xué)報(bào)》2017年01期
【摘要】：管道彎頭顯著改變了導(dǎo)波傳播特性,影響了對檢測信號的解讀,研究彎頭對導(dǎo)波傳播特性的影響是實(shí)現(xiàn)復(fù)雜管道系統(tǒng)導(dǎo)波檢測的基礎(chǔ)。采用半解析有限元法計(jì)算彎管導(dǎo)波頻散曲線,分析了彎管導(dǎo)波頻散曲線所呈現(xiàn)的不同特征,并基于彎管導(dǎo)波頻散曲線,以低頻L(0,1)模態(tài)導(dǎo)波為研究對象,實(shí)驗(yàn)研究了低頻L(0,1)模態(tài)導(dǎo)波通過管道彎頭時(shí)的模態(tài)變換特征。研究結(jié)果發(fā)現(xiàn),當(dāng)L(0,1)模態(tài)導(dǎo)波通過管道彎頭時(shí),不僅會發(fā)生L(0,1)到F(1,1)的模態(tài)變換,還會模態(tài)變換出反向L(0,1)模態(tài)導(dǎo)波,即彎頭反射現(xiàn)象,且隨著激勵頻率的降低和彎頭彎曲半徑的減小,彎頭反射現(xiàn)象愈發(fā)明顯。研究結(jié)果將深化對彎管導(dǎo)波傳播特性的認(rèn)識,推動導(dǎo)波檢測技術(shù)在復(fù)雜管道系統(tǒng)檢測中的應(yīng)用。
[Abstract]:Pipe elbows change the propagation characteristics of guided waves significantly and affect the interpretation of detection signals. The study of the influence of elbow on the propagation characteristics of guided waves is the basis for the detection of guided waves in complex pipeline systems. A semi-analytical finite element method is used to calculate the guided wave dispersion curve of the bend tube. The different characteristics of the guided wave dispersion curve are analyzed. Based on the guide wave dispersion curve of the bend tube, the low frequency Ln01) mode guided wave is taken as the research object. The modal transformation characteristics of low frequency Ln0 / 1) guided waves passing through pipe bends are experimentally studied. The results show that when the mode guided wave passes through the bend of the pipe, not only the mode transformation from L0 / 1) to F1 / 1] will occur, but also the reverse mode guided wave (L0 / 1), that is, the reflection phenomenon of the bend, will occur. With the decrease of excitation frequency and bending radius, the reflection phenomenon becomes more and more obvious. The results of the study will deepen the understanding of the propagation characteristics of guided waves in curved pipes and promote the application of guided wave detection technology in the detection of complex pipeline systems.
【作者單位】： 武漢理工大學(xué)能源與動力學(xué)院;海軍工程大學(xué)動力工程學(xué)院;
【基金】：湖北省自然科學(xué)基金項(xiàng)目(2016CKB700) 國防預(yù)研基金項(xiàng)目(9140A27020115JB11001)資助
【分類號】：U178
【相似文獻(xiàn)】
相關(guān)期刊論文 前10條
1 田光春,劉鎮(zhèn)清,景永剛;斜面型厚度變化板中導(dǎo)波的研究[J];聲學(xué)技術(shù);2004年01期
2 王成;魏立堯;寧建國;;金屬桿錨固系統(tǒng)中導(dǎo)波傳播特性的試驗(yàn)研究[J];無損檢測;2006年04期
3 吳斌;鄧菲;何存富;李隆濤;;時(shí)頻重排方法在管道導(dǎo)波信號處理中的應(yīng)用[J];無損檢測;2006年07期
4 王s，
本文編號：1909797
本文鏈接：http://sikaile.net/kejilunwen/daoluqiaoliang/1909797.html
本文選題：導(dǎo)波 + 模態(tài)變換 ； 參考：《聲學(xué)學(xué)報(bào)》2017年01期
【摘要】：管道彎頭顯著改變了導(dǎo)波傳播特性,影響了對檢測信號的解讀,研究彎頭對導(dǎo)波傳播特性的影響是實(shí)現(xiàn)復(fù)雜管道系統(tǒng)導(dǎo)波檢測的基礎(chǔ)。采用半解析有限元法計(jì)算彎管導(dǎo)波頻散曲線,分析了彎管導(dǎo)波頻散曲線所呈現(xiàn)的不同特征,并基于彎管導(dǎo)波頻散曲線,以低頻L(0,1)模態(tài)導(dǎo)波為研究對象,實(shí)驗(yàn)研究了低頻L(0,1)模態(tài)導(dǎo)波通過管道彎頭時(shí)的模態(tài)變換特征。研究結(jié)果發(fā)現(xiàn),當(dāng)L(0,1)模態(tài)導(dǎo)波通過管道彎頭時(shí),不僅會發(fā)生L(0,1)到F(1,1)的模態(tài)變換,還會模態(tài)變換出反向L(0,1)模態(tài)導(dǎo)波,即彎頭反射現(xiàn)象,且隨著激勵頻率的降低和彎頭彎曲半徑的減小,彎頭反射現(xiàn)象愈發(fā)明顯。研究結(jié)果將深化對彎管導(dǎo)波傳播特性的認(rèn)識,推動導(dǎo)波檢測技術(shù)在復(fù)雜管道系統(tǒng)檢測中的應(yīng)用。
[Abstract]:Pipe elbows change the propagation characteristics of guided waves significantly and affect the interpretation of detection signals. The study of the influence of elbow on the propagation characteristics of guided waves is the basis for the detection of guided waves in complex pipeline systems. A semi-analytical finite element method is used to calculate the guided wave dispersion curve of the bend tube. The different characteristics of the guided wave dispersion curve are analyzed. Based on the guide wave dispersion curve of the bend tube, the low frequency Ln01) mode guided wave is taken as the research object. The modal transformation characteristics of low frequency Ln0 / 1) guided waves passing through pipe bends are experimentally studied. The results show that when the mode guided wave passes through the bend of the pipe, not only the mode transformation from L0 / 1) to F1 / 1] will occur, but also the reverse mode guided wave (L0 / 1), that is, the reflection phenomenon of the bend, will occur. With the decrease of excitation frequency and bending radius, the reflection phenomenon becomes more and more obvious. The results of the study will deepen the understanding of the propagation characteristics of guided waves in curved pipes and promote the application of guided wave detection technology in the detection of complex pipeline systems.
【作者單位】： 武漢理工大學(xué)能源與動力學(xué)院;海軍工程大學(xué)動力工程學(xué)院;
【基金】：湖北省自然科學(xué)基金項(xiàng)目(2016CKB700) 國防預(yù)研基金項(xiàng)目(9140A27020115JB11001)資助
【分類號】：U178
【相似文獻(xiàn)】
相關(guān)期刊論文 前10條
1 田光春,劉鎮(zhèn)清,景永剛;斜面型厚度變化板中導(dǎo)波的研究[J];聲學(xué)技術(shù);2004年01期
2 王成;魏立堯;寧建國;;金屬桿錨固系統(tǒng)中導(dǎo)波傳播特性的試驗(yàn)研究[J];無損檢測;2006年04期
3 吳斌;鄧菲;何存富;李隆濤;;時(shí)頻重排方法在管道導(dǎo)波信號處理中的應(yīng)用[J];無損檢測;2006年07期
4 王s，
本文編號：1909797
本文鏈接：http://sikaile.net/kejilunwen/daoluqiaoliang/1909797.html
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