| Research on sound radiation from body in free field |
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| 作者姓名： | ZHAO Xiang and HUANG Youling |
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| 作者单位： | Dept.of Engineering Mechanics，Xi'an Jiaotong University，Xi'an 710049 |
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| 摘 要： | I.IntroductionWhenastructurcvibratcs,itsvibratingsurfacewillmakesurroundingmediummovetogethcrwithit.Ifthernotionissofastthatthcmediumroundthestructureproduccaloca1contractionandcxpansionandthcypropagatefaraway,thesoundradiationisformed.Itispossiblctodcscribeanalytica11ytheradiationfic1dofsimplyandregularlyshapcdsourcessuchaspointsoundsourccs,spherica1soundsourccsandinflnite1engthllnearsoundsourccs,butitisa1mostimpossib1ctosolvetheradiationfiledbyanyanalyt-ica1methodforsourcesofvcrycomplicateds…
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Research on sound radiation from body in free field |
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| Authors: | ZHAO Xiang and HUANG Youling |
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| Abstract: | There is a quantitative relation between vibration and radiation noise of a structure body. In this paper, the Helmholtz integral equation, which is the theoretical formula for sound radiation from a body in the free field, is discretized with the boundary element method and the exterior sound radiation field is calculated for a given specified surface velocity of elastic vibration of an arbitrarily shaped body. The characteristics of the sound field radiated from the body is therefore effectively predicted. |
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| Keywords: | Sound radiation Free field Boundary element method |
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