Article(id=1320037733888799281, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1320037688510628614, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1005-0329.2026.04.009, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1765382400000, receivedDateStr=2025-12-11, revisedDate=1770739200000, revisedDateStr=2026-02-11, acceptedDate=null, acceptedDateStr=null, onlineDate=1792651120873, onlineDateStr=2026-10-22, pubDate=1777478400000, pubDateStr=2026-04-30, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792651120873, onlineIssueDateStr=2026-10-22, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792651120873, creator=13701087609, updateTime=1792651120873, updator=13701087609, issue=Issue{id=1320037688510628614, tenantId=1146029695717560320, journalId=1316781260334530699, year='2026', volume='54', issue='4', pageStart='1', pageEnd='118', issueExtLink='null', onlineDate='null', pubDate='1777478400000', pubDateStr='2026-04-30', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792651110055, creator='13701087609', updateTime=1792656236652, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1320059191075656665, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1320037688510628614, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1320059191075656666, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1320037688510628614, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=70, endPage=79, ext={EN=ArticleExt(id=1320037734052377138, articleId=1320037733888799281, tenantId=1146029695717560320, journalId=1316781260334530699, language=EN, title=Study on internal flow noise characteristics of tandem valves, columnId=null, journalTitle=Fluid Machinery, columnName=null, runingTitle=null, highlight=null, articleAbstract=
To investigate the effect of the distance between tandem valves on the flow and noise within the pipeline,based on the IDDES turbulence model and Lighthill's acoustic analogy theory,combined with computational fluid dynamics and acoustic finite element methods,the internal flow field and its induced acoustic field within the valve pipeline under three different spacing conditions were solved.The influence of varying valve spacing on the flow‑induced noise within the valve pipeline was analyzed.The results show that as the spacing increases,the low‑pressure region between the valves decreases,while the area of the low‑pressure region at the downstream valve increases.The continuity of the high‑velocity regions on both sides of the downstream valve weakens,and the shedding position of the high‑velocity wake occurs earlier.The influence of the upstream valve's trailing vortex between the valves diminishes,while the downstream vortex system develops more fully,with increased vortex velocity and vorticity.The intensity of pressure pulsation between the valves is significantly weakened (maximum reduction of 10.38%),while the total level of pulsating pressure behind the valve shows an increasing trend (maximum increase of 2.09%).Regarding acoustic characteristics,the flow‑passing components such as the valve shaft and the edge of the valve disc are the main sound sources.As the spacing increases,the area of high sound source intensity between the valves and behind the valve decreases,with sound pressure energy concentrated within 80 Hz.With increasing valve spacing,the total sound pressure level at the measurement point between the valves at a spacing of 2.5D decreases by 8.52% and 4.96% compared to spacings of 1.5D and 2.0D,respectively.At the measurement point behind the valve,the total level at a spacing of 2.5D increases by 2.13% and 1.2% compared to spacings of 1.5D and 2.0D,respectively.The high sound pressure level area is concentrated at the edge of the valve disc and on both the upper and lower sides of the pipeline behind the valve shaft.As the spacing increases,the area and proportion of high sound pressure between the valves decrease,the energy weakens,while the area of high sound pressure behind the valve increases.This study provides a theoretical basis for the low‑noise design of ships and similar industrial pipeline systems.
, authors=Houlin LIU
1, Honglei CHEN
1, Minggao TAN
1, Jianghai WU
2, Denghao WU
3, Liang DONG
1, authorsList=Houlin LIU, Honglei CHEN, Minggao TAN, Jianghai WU, Denghao WU, Liang DONG, authorCompany=null, correspAuthors=Honglei CHEN, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1320037738028577359, articleId=1320037733888799281, tenantId=1146029695717560320, journalId=1316781260334530699, language=CN, title=串列阀门内流噪声特性研究, columnId=1317484287230853622, journalTitle=流体机械, columnName=设计计算, runingTitle=null, highlight=null, articleAbstract=
为探究串列阀门间距对管路内流动与噪声的影响,基于IDDES湍流模型和Lighthill声类比理论,结合计算流体动力学与声学有限元方法,对3种不同间距下阀门管路内的内流场及其诱导声场进行求解,并分析不同阀门间距对阀门管路内流诱导噪声的影响规律。结果表明,随着间距增大,阀间低压区减少,下游阀门处低压区面积增大;下游阀门两侧高速区连续性减弱,高速尾流脱落位置提前;上游阀门尾涡在阀间的影响减小,下游涡系发展更充分,涡速与涡量增加;阀间压力脉动强度显著减弱(最大降幅10.38%),阀后脉动压力总级呈增大趋势(最大增幅2.09%)。声学特性上,阀轴、阀盘边缘等过流部件是主要声源;随间距增加,阀间与阀后高声源强度区减小,声压能量集中在80 Hz以内。随着阀间间距增加,阀间测点在2.5D间距时的声压级总级比1.5D和2.0D分别减小8.52%和4.96%;阀后测点在2.5D间距时的总级比1.5D和2.0D分别增大2.13%和1.2%。高声压级区域集中在阀盘边缘及阀轴后方管道上下两侧;随间距增加,阀间高声压区及占比减小,能量减弱,阀后高声压面积增大。研究可为船舶及类似工业管路系统的低噪声设计提供理论依据。
, authors=刘厚林
1, 陈洪磊
1, 谈明高
1, 吴江海
2, 吴登昊
3, 董亮
1, authorsList=刘厚林, 陈洪磊, 谈明高, 吴江海, 吴登昊, 董亮, authorCompany=null, correspAuthors=陈洪磊, authorNote=
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陈洪磊(2001),男,硕士研究生,主要从事流体机械内部流动及流致噪声研究,通信地址:212013江苏省镇江市京口区学府路301号江苏大学流体机械工程技术研究中心,E-mail:
1325542463@qq.com。
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作者向本刊所投稿件一经本刊录用,则该论文的复制权、发行权、信息网络传播权、翻译权、汇编权等权利视为自动转让给本刊。本刊为国内各主要数据库收录期刊,本刊所发表的稿件将同时通过互联网进行网络出版或提供信息服务。, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=1ubIvb76EUeqLIcenMn5Dg==, magXml=8N1qkQ6mA662rrm4FYnHRQ==, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=73/pSLW1CX3Yo96Y1DnqNg==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=P1cWQ1dEWm+R3kxJb4SnOw==, mapNumber=null, fund=null)}, authors=[Author(id=1320037738582225498, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=liuhoulin@ujs.edu.cn, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1320037738657722972, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, authorId=1320037738582225498, language=EN, stringName=Houlin LIU, firstName=Houlin, middleName=null, lastName=LIU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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刘厚林(1971),男,研究员,主要从事流体机械理论与应用研究,E-mail:liuhoulin@ujs.edu.cn。
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pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=21, rfOrder=36, authorNames=null, journalName=null, refType=null, unstructuredReference=PROUDMAN I.The generation of noise by isotropic turbulence[J].Proceedings of the Royal Society of London.Series A,1952,214(1116):119-132., articleTitle=null, refAbstract=null), Reference(id=1320037750938645189, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=22, rfOrder=37, authorNames=null, journalName=null, refType=null, unstructuredReference=谈明高,王昊晨,刘厚林,等.变径管内流噪声特性及优化研究[J].流体机械,2025,53(6):104-110., articleTitle=null, refAbstract=null), Reference(id=1320037751005754055, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=22, rfOrder=38, authorNames=null, journalName=null, refType=null, unstructuredReference=TAN M G,WANG H C,LIU H L,et al.Research on the characteristics and optimization of flow noise in variable diameter pipes[J].Fluid Machinery,2025,53(6):104-110., articleTitle=null, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1320037738301207120, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, xref=1, ext=[AuthorCompanyExt(id=1320037738305401425, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, companyId=1320037738301207120, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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3中国计量大学 计量测试与仪器学院,杭州 310018)])], figs=[ArticleFig(id=1320037742214492799, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=EN, label=Fig.1, caption=
Computational model, figureFileSmall=EtrhdkGCl7Q1VCUxzruigA==, figureFileBig=73/pSLW1CX3Yo96Y1DnqNg==, tableContent=null), ArticleFig(id=1320037742277407360, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=CN, label=图1, caption=
计算模型(a)阀板 (b)阀门计算流体域
, figureFileSmall=EtrhdkGCl7Q1VCUxzruigA==, figureFileBig=73/pSLW1CX3Yo96Y1DnqNg==, tableContent=null), ArticleFig(id=1320037742482928257, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=EN, label=Fig.2, caption=
Fluid domain mesh, figureFileSmall=nRcFwfC01121vFDFcuNSQQ==, figureFileBig=cxQ6FBHuzv+FpsZcTzPZjw==, tableContent=null), ArticleFig(id=1320037742579397250, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=CN, label=图2, caption=
流体域网格, figureFileSmall=nRcFwfC01121vFDFcuNSQQ==, figureFileBig=cxQ6FBHuzv+FpsZcTzPZjw==, tableContent=null), ArticleFig(id=1320037742633923203, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=EN, label=Fig.3, caption=
Comparison of total pulsation levels under differentcomputation durations, figureFileSmall=kCRigmcHNezNAi+dhWHrTQ==, figureFileBig=cReOmz5NwtxIJZ4/AM3ybA==, tableContent=null), ArticleFig(id=1320037742705226372, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=CN, label=图3, caption=
不同计算时长下脉动总级对比, figureFileSmall=kCRigmcHNezNAi+dhWHrTQ==, figureFileBig=cReOmz5NwtxIJZ4/AM3ybA==, tableContent=null), ArticleFig(id=1320037742776529541, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=EN, label=Fig.4, caption=
Schematic diagram of the test bench, figureFileSmall=dIPQyJV4Iv3QcHXuh+vFwg==, figureFileBig=QQ8RuOBs9m7WAYsRhkLxFQ==, tableContent=null), ArticleFig(id=1320037742843638406, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=CN, label=图4, caption=
试验台示意, figureFileSmall=dIPQyJV4Iv3QcHXuh+vFwg==, figureFileBig=QQ8RuOBs9m7WAYsRhkLxFQ==, tableContent=null), ArticleFig(id=1320037742906552967, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=EN, label=Fig.5, caption=
Comparison of computational and test results, figureFileSmall=tEa7sQNI3DUH9ZHjUeSiUg==, figureFileBig=AHrY3vc1BM4Aez3Lpnb15g==, tableContent=null), ArticleFig(id=1320037742969467528, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=CN, label=图5, caption=
计算与试验结果对比, figureFileSmall=tEa7sQNI3DUH9ZHjUeSiUg==, figureFileBig=AHrY3vc1BM4Aez3Lpnb15g==, tableContent=null), ArticleFig(id=1320037743040770697, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=EN, label=Fig.6, caption=
Pressure contours on valve cross‑sections under different schemes, figureFileSmall=xqVOCSjfu9vo7Slxhiq3Qw==, figureFileBig=k4ND+cd7PZBbStR7bjjYgQ==, tableContent=null), ArticleFig(id=1320037743107879562, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=CN, label=图6, caption=
不同方案下阀门截面压力云图, figureFileSmall=xqVOCSjfu9vo7Slxhiq3Qw==, figureFileBig=k4ND+cd7PZBbStR7bjjYgQ==, tableContent=null), ArticleFig(id=1320037743174988427, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=EN, label=Fig.7, caption=
Velocity contours on valve cross‑sections underdifferent schemes, figureFileSmall=tPs35KYs8uo395rN1j3kvA==, figureFileBig=UCSriqIIQSG01YNcEQqiNA==, tableContent=null), ArticleFig(id=1320037743284040332, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=CN, label=图7, caption=
不同方案下阀门截面速度云图, figureFileSmall=tPs35KYs8uo395rN1j3kvA==, figureFileBig=UCSriqIIQSG01YNcEQqiNA==, tableContent=null), ArticleFig(id=1320037743355343501, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=EN, label=Fig.8, caption=
Q‑criterion vortex core contours under different schemes, figureFileSmall=6ZwGf5QKdqkg6gxgf2FsPA==, figureFileBig=Q/p8GFqjnY0HjKeMvkATiQ==, tableContent=null), ArticleFig(id=1320037745041453710, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=CN, label=图8, caption=
不同方案下Q准则涡核云图, figureFileSmall=6ZwGf5QKdqkg6gxgf2FsPA==, figureFileBig=Q/p8GFqjnY0HjKeMvkATiQ==, tableContent=null), ArticleFig(id=1320037745104368271, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=EN, label=Fig.9, caption=
Schematic of pressure pulsation monitoring points, figureFileSmall=TCN4jKWqnN/dsgex1OqbbQ==, figureFileBig=XOD74ka20IdAriH+L3sAcQ==, tableContent=null), ArticleFig(id=1320037745175671440, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=CN, label=图9, caption=
压力脉动测点示意, figureFileSmall=TCN4jKWqnN/dsgex1OqbbQ==, figureFileBig=XOD74ka20IdAriH+L3sAcQ==, tableContent=null), ArticleFig(id=1320037745242780305, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=EN, label=Fig.10, caption=
RMSE contours of pressure on valve cross‑sectionsunder different schemes, figureFileSmall=G1tLIjiQm4Ysj3GCjU9Cww==, figureFileBig=ks8xMZ508l3O749HQLZ1Pg==, tableContent=null), ArticleFig(id=1320037745305694866, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=CN, label=图10, caption=
不同方案下阀门截面压力RMSE云图, figureFileSmall=G1tLIjiQm4Ysj3GCjU9Cww==, figureFileBig=ks8xMZ508l3O749HQLZ1Pg==, tableContent=null), ArticleFig(id=1320037745381192339, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=EN, label=Fig.11, caption=
Auto‑spectra of pressure pulsation underdifferent schemes, figureFileSmall=v3wGClWpNxDqli+ENcuqXw==, figureFileBig=z3uujMZTGVuDJ2Rsju02Yg==, tableContent=null), ArticleFig(id=1320037745448301204, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=CN, label=图11, caption=
不同方案下压力脉动自谱图, figureFileSmall=v3wGClWpNxDqli+ENcuqXw==, figureFileBig=z3uujMZTGVuDJ2Rsju02Yg==, tableContent=null), ArticleFig(id=1320037745532187285, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=EN, label=Fig.12, caption=
Source strength contours on valve cross‑sectionsunder different schemes, figureFileSmall=hf8CDcIAkVBAgC/iFXH1sA==, figureFileBig=DSFbc6g2K9ubrRzHKjmY5g==, tableContent=null), ArticleFig(id=1320037745590907542, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=CN, label=图12, caption=
不同方案下阀门截面声源强度云图, figureFileSmall=hf8CDcIAkVBAgC/iFXH1sA==, figureFileBig=DSFbc6g2K9ubrRzHKjmY5g==, tableContent=null), ArticleFig(id=1320037745653822103, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=EN, label=Fig.13, caption=
Sound pressure level spectra of the valve underdifferent schemes, figureFileSmall=jjP5x5HQdLR+satPuzBWFg==, figureFileBig=kCXZx8Ebo9sFZpDjYxdU/A==, tableContent=null), ArticleFig(id=1320037745712542360, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=CN, label=图13, caption=
不同方案下阀门声压级频谱曲线图, figureFileSmall=jjP5x5HQdLR+satPuzBWFg==, figureFileBig=kCXZx8Ebo9sFZpDjYxdU/A==, tableContent=null), ArticleFig(id=1320037745783845529, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=EN, label=Fig.14, caption=
Sound pressure level contours on valvecross‑sections under different schemes, figureFileSmall=l135Ck7JgmYFHi3h5e4Sag==, figureFileBig=O5IciY+fThtNHPGda5jsUg==, tableContent=null), ArticleFig(id=1320037745842565786, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=CN, label=图14, caption=
不同方案下阀门截面声压级云图, figureFileSmall=l135Ck7JgmYFHi3h5e4Sag==, figureFileBig=O5IciY+fThtNHPGda5jsUg==, tableContent=null), ArticleFig(id=1320037745905480347, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=EN, label=Tab.1, caption=
Grid dependence check
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | y+ | | 网格数 | | 脉动总级/dB |
|---|
| 1.5D | 2.0D | 2.5D | | 1.5D | 2.0D | 2.5D | | 1.5D | 2.0D | 2.5D |
|---|
| 粗糙 | 3 | 5 | 4 | | 2 864 521 | 3 041 254 | 3 395 263 | | 150.2 | 150.9 | 153.1 |
| 中等 | 1 | 1 | 1 | | 4 556 628 | 4 771 456 | 4 909 899 | | 153.1 | 153.4 | 156.3 |
| 精细 | 0.71 | 0.76 | 0.86 | | 5 861 447 | 6 095 422 | 6 524 417 | | 153.2 | 153.6 | 156.4 |
), ArticleFig(id=1320037745989366428, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=CN, label=表1, caption=
网格无关性检查
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | y+ | | 网格数 | | 脉动总级/dB |
|---|
| 1.5D | 2.0D | 2.5D | | 1.5D | 2.0D | 2.5D | | 1.5D | 2.0D | 2.5D |
|---|
| 粗糙 | 3 | 5 | 4 | | 2 864 521 | 3 041 254 | 3 395 263 | | 150.2 | 150.9 | 153.1 |
| 中等 | 1 | 1 | 1 | | 4 556 628 | 4 771 456 | 4 909 899 | | 153.1 | 153.4 | 156.3 |
| 精细 | 0.71 | 0.76 | 0.86 | | 5 861 447 | 6 095 422 | 6 524 417 | | 153.2 | 153.6 | 156.4 |
), ArticleFig(id=1320037746052280989, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=EN, label=Tab.2, caption=
Acoustic cavity modal calculation results
, figureFileSmall=null, figureFileBig=null, tableContent=
| 研究方案 | 一阶 | 二阶 | 三阶 |
|---|
| 方案1(1.5D) | 0.000 052 900 | 0.000 108 | 652 |
| 方案2(2.0D) | 0.000 129 759 | 0.000 144 | 624 |
| 方案3(2.5D) | 0.000 041 400 | 0.000 156 | 598 |
), ArticleFig(id=1320037746119389854, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037733888799281, language=CN, label=表2, caption=
声腔模态计算结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 研究方案 | 一阶 | 二阶 | 三阶 |
|---|
| 方案1(1.5D) | 0.000 052 900 | 0.000 108 | 652 |
| 方案2(2.0D) | 0.000 129 759 | 0.000 144 | 624 |
| 方案3(2.5D) | 0.000 041 400 | 0.000 156 | 598 |
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