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ID:52490248
大小:2.11 MB
页数:6页
时间:2020-03-28
《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
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