浮动舱室设计对船舶机舱舱室振声性能的影响.pdf

《浮动舱室设计对船舶机舱舱室振声性能的影响.pdf》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、第37卷第2期2015年2月舰船科学技术SHIPSCIENCEANDTECHNOLOGYV01．37，No．2Feb．，2015浮动舱室设计对船舶机舱舱室振声性能的影响梁炳南1，于洪亮1”，蔡延年1(1．大连海事大学轮机工程学院，辽宁大连116026；2．集美大学轮机工程学院，福建厦门361021)摘要：以某航海教学实习船机舱为原型，建立机舱三舱段有限元模型，确定振动预报模型边界条件，选择发电柴油机组悬着位置作为力激励点，采用有限元／边界元法预测了机舱集控室和机修间声功率级，对比分析该两舷侧对称舱室场点声压

2、级云图。计算各壁板对值班轮机员右耳位置声压的贡献度，验证以浮动地板为基础的浮动舱室设计可以有效降低舱室噪声。将此振动一声辐射耦合系统简化为箱形多腔结构，建立多腔结构及其单元腔室有限元模型，进行船舶机舱模型振动一声辐射实验，仿真结果与实验测量结果吻合较好，验证仿真方法的有效性。总结出船舶机舱舱段模型振声数值预报通用方法及流程，对指导船舶减振降噪有借鉴价值。关键词：船舶机舱；浮动舱室；有限元法；边界元法；声辐射；声学贡献度中图分类号：U661．44；TB532文献标识码：A文章编号：1672—7649(2015

3、)02—0024—06doi：10．3404／j．issn．1672—7649．2015．02．005Effectoffloatingcabinsdesignonvibro·acousticcharacteristicsofvesselengineroomcabinsLIANGBing．nanl，YUHong．1ian91”，CAIYan—nianl(1．SchoolofMarineEngineering，DalianMaritimeUniversity，Dalian16026，China；2．School

4、ofMarineEngineering，JimeiUniversity，Xiamen361021，China)Abstract：Withtheengineroomofcertaintrainingshipfornavigationteachingbeingtheprototype，thefiniteelementmodelofthreecabinsisestablishedandtheboundaryconditionsofvibrationforecastingmodelareset．Theelastic

5、mountinstalledpositionsonthedieselgeneratorsetareselectedastheforceexcitationpoints．Thefiniteelement／boundaryelementmethodtopredictsoundpowerlevelofthemachinerycontrolroomandmechanicalworkshopsandsoundpressurecolornephogramofsymmetricalfieldpointsontwoside

6、siscomparedandanalyzed，thusthedegreeofcontributionofallbulkheadstothesoundpressureinthefightearpositionofthedutyengineerisacquired．Andthefloatingcabinsdesignbasedonfloatingfloorisverifiedtoeffectivelydecreasethenoiseincabin．thefiniteelementmodelofmulti——ta

7、nksstructureanditsunitchamberwasbuiltwhenthevibro—acousticcouplingsystemwassimplified．Andthevibro—acousticradiationexperimentofvesselengineroommodelwasconducted．Thesimulationresultsareconsistentwellwiththeexperimentalresults，whichverifythevalidityofthesimu

8、lationmethod．Themethodandprocessofpredictingvibrationandsoundofthevesselengineroomaresummarized，whichcouldbeareferenceforreducingvibrationandnoiseofships．Keywords：vesselengineroom；floatingcabins；finiteelement