{"title":"基于时域有限差分(FDTD)方法的水下弹性物体宽带声散射建模","authors":"Sun Tongjing, Li Guijuan, Li Mingda","doi":"10.1109/YCICT.2010.5713127","DOIUrl":null,"url":null,"abstract":"In order to solve the problem of broadband omnidirectional acoustic scattering computing for underwater elastic object, broadband acoustic scattering model of underwater elastic object is presented combining Finite-Difference Time-Domain (FDTD) method and the relation between scattering wave spectrum and form function. We simualted broadband acoustic scattering characteristic of elastic aluminum sphere using this method, and compared the result with the corresponding analytic solution, and they were in good agreement. Furthermore, we computed non-backscattering broadband characteristics, which were very difficult to gain using other methods, including bistatic angle 45 degree and 90 degree, and compared and analyzed them. The results showed that their formant position, vibration amplitude and resonance period existed distinct difference, that was to say, with the changing of bistatic angle, frequency domain scattering characteristic of the object brought great difference.","PeriodicalId":179847,"journal":{"name":"2010 IEEE Youth Conference on Information, Computing and Telecommunications","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Modeling broadband acoustic scattering of underwater elastic object using Finite-Difference Time-Domain (FDTD) method\",\"authors\":\"Sun Tongjing, Li Guijuan, Li Mingda\",\"doi\":\"10.1109/YCICT.2010.5713127\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In order to solve the problem of broadband omnidirectional acoustic scattering computing for underwater elastic object, broadband acoustic scattering model of underwater elastic object is presented combining Finite-Difference Time-Domain (FDTD) method and the relation between scattering wave spectrum and form function. We simualted broadband acoustic scattering characteristic of elastic aluminum sphere using this method, and compared the result with the corresponding analytic solution, and they were in good agreement. Furthermore, we computed non-backscattering broadband characteristics, which were very difficult to gain using other methods, including bistatic angle 45 degree and 90 degree, and compared and analyzed them. The results showed that their formant position, vibration amplitude and resonance period existed distinct difference, that was to say, with the changing of bistatic angle, frequency domain scattering characteristic of the object brought great difference.\",\"PeriodicalId\":179847,\"journal\":{\"name\":\"2010 IEEE Youth Conference on Information, Computing and Telecommunications\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2010-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2010 IEEE Youth Conference on Information, Computing and Telecommunications\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/YCICT.2010.5713127\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2010 IEEE Youth Conference on Information, Computing and Telecommunications","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/YCICT.2010.5713127","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Modeling broadband acoustic scattering of underwater elastic object using Finite-Difference Time-Domain (FDTD) method
In order to solve the problem of broadband omnidirectional acoustic scattering computing for underwater elastic object, broadband acoustic scattering model of underwater elastic object is presented combining Finite-Difference Time-Domain (FDTD) method and the relation between scattering wave spectrum and form function. We simualted broadband acoustic scattering characteristic of elastic aluminum sphere using this method, and compared the result with the corresponding analytic solution, and they were in good agreement. Furthermore, we computed non-backscattering broadband characteristics, which were very difficult to gain using other methods, including bistatic angle 45 degree and 90 degree, and compared and analyzed them. The results showed that their formant position, vibration amplitude and resonance period existed distinct difference, that was to say, with the changing of bistatic angle, frequency domain scattering characteristic of the object brought great difference.