欢迎来到天天文库
浏览记录
ID:53034068
大小:755.67 KB
页数:7页
时间:2020-04-14
《双层壳体船舶动力舱结构声学设计优化-论文.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10卷第3期中国舰船研究Vol_10NO.32015年6月ChineseJournalofShipResearch网络出版地址:http://www.cnki.net/kcms/detail/42.1755.TJ.20150526.0908.006.html期刊网址:WWW.ship—research.com引用格式:夏齐强,楼伟锋.双层壳体船舶动力舱结构声学设计优化[J].中国舰船研究,2015,10(3):77—83.XIAQiqiang,LOUWeifeng.Structure—bornesoundoptimizatio
2、ndesignofshippowercabinwithdoublecylindricalshell[J].ChineseJournalofShipResearch,2015,10(3):77-83.双层壳体船舶动力舱结构声学设计优化夏齐强,楼伟锋海军装备研究院,上海200235摘要:针对降低双层壳船舶动力舱辐射噪声的需求,对动力舱进行结构声学设计优化。基于结构阻抗增强原理,通过升高肋骨腹板和增加质量抗来增大双层壳结构低阶机械阻抗,并根据壳体优势模态对肋骨尺寸进行优化;为衰减振动波在壳间的传递,引入复合阻波技术,采用阻振质量与粘弹
3、性材料相结合的方法对壳间肋板进行设计;利用FEM/BEM法对动力舱设计前、后振动声辐射性能进行数值计算分析,并开展双层壳模型振动试验。结果表明:应用非均匀阻抗增强环肋和复合阻波技术能有效降低双层壳体船舶动力舱的振动水平和辐射噪声;设计的动力舱具有良好的减振降噪效果,振动水平明显降低,辐射噪声有效减小,是一个性能较好的弱辐射体。关键词:动力舱;双层圆柱壳;减振降噪;结构声学设计;弱辐射中图分类号:U661.44文献标志码:ADOI:10.3969~.issn.1673—3185.2015.03.013Structure-borne
4、soundoptimizationdesignofshippowercabinwithdoublecylindricalshellX/AQiqiang,LOUWengNavalAcademyofArmament,Shanghai200235,ChinaAbstract:Inordertodecreasesoundradiationofpowercabin,powercabinwithdoublecylindricalshellwasoptimizationdesigned.Basedonprincipleofimpedancee
5、nhancement,loworderimpedanceofdoublecylindricalshellwasimprovedbyraisingribheightandaddingblockingmass.Theribdimensionwasopti-mizedbythedominantmode.Astoreducevibrationtransmissionfromrib-platebetweendoubleshells,compositewaveattenuationtechniquewasintroducedintodesi
6、gnonribplatebythewayofblockingmassandelasticinterlayer.Thecharacteristicsofvibrationandsoundradiationfromthepowercabinwerenu-mericalanalyzedbyFEM/BEM.andmodeltestingwasdonetoverifythevalidityofstructure—bornesounddesign.TheresultsshowthatApplyingimpedanceenhancementa
7、ndcompositewaveattenuationtechniquecouldreducedthevibrationresponseandradiationnoiseofpowercabineffectively.Thedesignedpowercabinhasbettervibrationdampingandnoisereductionperformance,vibrationresponseandradiationnoisereducedobservably.Itwasabetterweakradiator.Keyword
8、s:powercabin;doublecylindricalshell;vibrationdampingandnoisereduction;struc-ture—bornesounddesign;weak—radiation0引言言在现代高科技战斗中,随着反潜探
此文档下载收益归作者所有