Article(id=1243226201347703061, tenantId=1146029695717560320, journalId=1242798230522609684, issueId=1243226190786441246, articleNumber=null, orderNo=null, doi=10.7511/jslx20240509001, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1715184000000, receivedDateStr=2024-05-09, revisedDate=1718035200000, revisedDateStr=2024-06-11, acceptedDate=null, acceptedDateStr=null, onlineDate=1774337824427, onlineDateStr=2026-03-24, pubDate=1761580800000, pubDateStr=2025-10-28, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1774337824427, onlineIssueDateStr=2026-03-24, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1774337824427, creator=13701087609, updateTime=1774337824427, updator=13701087609, issue=Issue{id=1243226190786441246, tenantId=1146029695717560320, journalId=1242798230522609684, year='2025', volume='42', issue='5', pageStart='699', pageEnd='888', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1774337821909, creator=13701087609, updateTime=1774338282025, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1243228120724128564, tenantId=1146029695717560320, journalId=1242798230522609684, issueId=1243226190786441246, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1243228120724128565, tenantId=1146029695717560320, journalId=1242798230522609684, issueId=1243226190786441246, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=786, endPage=794, ext={EN=ArticleExt(id=1243226202719240491, articleId=1243226201347703061, tenantId=1146029695717560320, journalId=1242798230522609684, language=EN, title=A weak-form meshfree method for two-dimensional acoustic wave propagation in multi-fluids, columnId=1243226193193971746, journalTitle=Chinese Journal of Computational Mechanics, columnName=Research Papers, runingTitle=null, highlight=null, articleAbstract=
Research on acoustic propagation in multiple fluids has important application values in naval architecture and ocean engineering, such as sound propagation in pipelines filled with water and air, and the detection of buried objects. There are two difficulties in solving such problems with the use of the classical finite element method: one is the serious numerical dispersion error in the finite element solutions under medium and high wave numbers; the other is the need to use refined mesh grids to discretize the fluids near the coupling interface. These difficulties lead to a large computational cost for the finite element method, and the manual intervention to generate refined grids. Compared with the finite element method, the weak-form meshfree method does not require traditional grids, and the dispersion error effect in its solution is much weaker, ensuring good computational accuracy and efficiency. However, the meshfree shape functions are usually discontinuous in the problem domain, resulting in the inability of the continuity condition of the acoustic particle velocity to be naturally satisfied on the interface. Therefore, this paper uses the penalty function method to reconstruct the continuity condition of the acoustic particle velocity on the interface, and proposes a Galerkin weak form suitable for meshfree methods for sound propagation in multiple fluids. Numerical analysis shows that the meshfree solutions is consistent with the reference solutions, and the computational accuracy and efficiency of the meshfree method can be higher than the finite element solutions.
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多流体域声传播研究在船海工程中具有重要的应用价值,如气液共存的管道声传播分析、海底掩埋物探测等。经典有限元法求解此类问题时存在两个难点。一是中高波数下解存在严重的数值色散误差;二是耦合界面附近必须使用精细网格。这些难点导致有限元法的计算量较庞大,需人工干预以生成高质量网格。与有限元法相比,弱形式无网格法无需传统意义上的网格划分,其解的色散误差效应更弱,保证了良好的计算精度及效率,但径向基无网格形函数具有不连续性质,导致质点振速连续条件无法在界面上自然满足。因此,本文提出了多流体域声传播计算的无网格伽辽金弱形式,运用罚函数法重构了界面上的质点振速连续条件。数值分析表明,无网格解与参考解相符,且计算精度及效率优于有限元解。
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1.长沙理工大学 水利与海洋工程学院,长沙 410114
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1.School of Hydraulic and Ocean Engineering, Changsha University of Science & Technology, Changsha 410114, China
2.Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1243226229101413187, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, authorId=1243226228333855537, language=CN, stringName=姚宇, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1.长沙理工大学 水利与海洋工程学院,长沙 410114
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3.华中科技大学 船舶与海洋工程学院,武汉 430074, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1243226225590780663, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, xref=3., ext=[AuthorCompanyExt(id=1243226225594974968, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, companyId=1243226225590780663, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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气液共存的管道尺寸, figureFileSmall=b3CTptOh/XW2WPNVumuKrw==, figureFileBig=2tGmGUKNEHizU/leVUwlaw==, tableContent=null), ArticleFig(id=1243226238224024538, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, language=EN, label=Fig. 6, caption=
Real parts of acoustic pressure along the center line of the tube under the different frequencies, figureFileSmall=1AOtnePZOwvjHYZr/HqVMA==, figureFileBig=7h4RdHMhesgisP06s7yLZA==, tableContent=null), ArticleFig(id=1243226238647649249, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, language=CN, label=图6, caption=
不同频率下管道纵向中心线上的声压实部, figureFileSmall=1AOtnePZOwvjHYZr/HqVMA==, figureFileBig=7h4RdHMhesgisP06s7yLZA==, tableContent=null), ArticleFig(id=1243226239058691048, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, language=EN, label=Fig. 7, caption=
Acoustic particle velocities upon the interface of air and water for a series of frequencies, figureFileSmall=RvZesCOdaP0dcP/xbDi7CA==, figureFileBig=GdDiKgId9SMEJ70u3AuvGg==, tableContent=null), ArticleFig(id=1243226239381652463, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, language=CN, label=图7, caption=
一系列频率下不同流体介质在耦合界面上的质点振速, figureFileSmall=RvZesCOdaP0dcP/xbDi7CA==, figureFileBig=GdDiKgId9SMEJ70u3AuvGg==, tableContent=null), ArticleFig(id=1243226239847220217, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, language=EN, label=Fig. 8, caption=
Convergence property of the numerical solutions of RPIM and FEM at f=250 Hz, figureFileSmall=16vYOOae7SCxDhwfxqa7Rw==, figureFileBig=3SPtaWeh/zoWMR18S5SNmw==, tableContent=null), ArticleFig(id=1243226240463781888, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, language=CN, label=图8, caption=
f=250 Hz时RPIM和FEM数值解的收敛性质, figureFileSmall=16vYOOae7SCxDhwfxqa7Rw==, figureFileBig=3SPtaWeh/zoWMR18S5SNmw==, tableContent=null), ArticleFig(id=1243226240862240777, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, language=EN, label=Fig. 9, caption=
Comparison of the computational efficiency of RPIM and FEM at f=250 Hz, figureFileSmall=IZETjnOeXSBP1vk9UNmGBg==, figureFileBig=LtqOWLn87dpmo7Hv96qrNA==, tableContent=null), ArticleFig(id=1243226241214562318, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, language=CN, label=图9, caption=
f=250 Hz时RPIM和FEM的计算效率对比, figureFileSmall=IZETjnOeXSBP1vk9UNmGBg==, figureFileBig=LtqOWLn87dpmo7Hv96qrNA==, tableContent=null), ArticleFig(id=1243226241583661076, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, language=EN, label=Fig. 10, caption=
Tube filled with air bubbles, figureFileSmall=tyPDeruZ8WEcg4qmzb9TbQ==, figureFileBig=ZkjeYUUNWNeFf0Hd1nw5MQ==, tableContent=null), ArticleFig(id=1243226242019868695, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, language=CN, label=图10, caption=
存在气泡的管道尺寸, figureFileSmall=tyPDeruZ8WEcg4qmzb9TbQ==, figureFileBig=ZkjeYUUNWNeFf0Hd1nw5MQ==, tableContent=null), ArticleFig(id=1243226242472853534, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, language=EN, label=Fig. 11, caption=
Acoustic pressure obtained by the different numerical methods at f=21500 Hz, figureFileSmall=pmesusTDm7AsMEQEoiwtbg==, figureFileBig=c6AasucHXuSKSByHNlDYPw==, tableContent=null), ArticleFig(id=1243226242674180132, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, language=CN, label=图11, caption=
f=21500 Hz时不同数值方法计算得到的管道内声压分布, figureFileSmall=pmesusTDm7AsMEQEoiwtbg==, figureFileBig=c6AasucHXuSKSByHNlDYPw==, tableContent=null), ArticleFig(id=1243226242800009257, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, language=EN, label=Fig. 12, caption=
Acoustic pressure obtained by the different numerical methods at f=39500 Hz, figureFileSmall=/9sqardqZemSRvS6+LskRA==, figureFileBig=yIT4KND9K029xO/R7djM7w==, tableContent=null), ArticleFig(id=1243226243215245360, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, language=CN, label=图12, caption=
f=39500 Hz时不同数值方法计算得到的管道内声压分布, figureFileSmall=/9sqardqZemSRvS6+LskRA==, figureFileBig=yIT4KND9K029xO/R7djM7w==, tableContent=null), ArticleFig(id=1243226243504652339, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, language=EN, label=Fig. 13, caption=
Rigid cylinder shell partially buried in sand, figureFileSmall=tQ7RW/mLwES+0XYbuDcsUA==, figureFileBig=iRExQLLrlkU6raczGzDc5Q==, tableContent=null), ArticleFig(id=1243226243764699194, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, language=CN, label=图13, caption=
部分掩埋于海底的刚性圆柱壳, figureFileSmall=tQ7RW/mLwES+0XYbuDcsUA==, figureFileBig=iRExQLLrlkU6raczGzDc5Q==, tableContent=null), ArticleFig(id=1243226244167352385, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, language=EN, label=Fig. 14, caption=
Absolute values of scattering pressure and transmission pressure fields at f=500 Hz, figureFileSmall=oixBmTPexefV8GVyQAntUg==, figureFileBig=BrurokOIvWMKry4xg1C+GA==, tableContent=null), ArticleFig(id=1243226244586782787, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, language=CN, label=图14, caption=
f=500 Hz时问题域内的混叠声压场, figureFileSmall=oixBmTPexefV8GVyQAntUg==, figureFileBig=BrurokOIvWMKry4xg1C+GA==, tableContent=null), ArticleFig(id=1243226245022990413, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, language=EN, label=Fig. 15, caption=
Absolute values of scattering pressure and transmission pressure fields at f=800 Hz, figureFileSmall=hDhF6JzzAwEZwwMe7Kc9dg==, figureFileBig=SnwOQwuPXvymvPEwIjl/1g==, tableContent=null), ArticleFig(id=1243226245345951824, tenantId=1146029695717560320, journalId=1242798230522609684, articleId=1243226201347703061, language=CN, label=图15, caption=
f=800 Hz时问题域内的混叠声压场, figureFileSmall=hDhF6JzzAwEZwwMe7Kc9dg==, figureFileBig=SnwOQwuPXvymvPEwIjl/1g==, tableContent=null)], attaches=null, journal=Journal(id=1242798115187638291, delFlag=0, nameCn=计算力学学报, nameEn=Chinese Journal of Computational Mechanics, nameHistory1=null, nameHistory2=null, issn=1007-4708, eissn=null, cn=21-1373/O3, coden=null, periodic=1, language=CN, oaType=null, ccby=null, superviseOffice=null, ownerOffice=null, pubOffice=null, editorOffice=null, officeType=null, aims=null, clcCode=null, officeProv=null, officeCity=null, officeAddr=null, officeZip=null, officeEmail=null, officePhone=null, editDirector=null, officeDirector=null, officeDirectorPhone=null, officeStaffNum=null, officeEmpNum=null, coverPicUrl=6StN/S2YUwhc5imi3Qg6OA==, journalPrice=null, startedYear=null, abbrevIsoEn=Chinese Journal of Computational Mechanics, journalRemark=null, publicationField=null, createdTime=1774235760735, updatedTime=1774236698957, createdBy=18614031015, updatedBy=13701087609, 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