武汉理工大学学报(交通科学与工程版)
武漢理工大學學報(交通科學與工程版)
무한리공대학학보(교통과학여공정판)
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY(TRANSPORTATION SCIENCE & ENGINEERING)
2015年
4期
815-818,822
,共5页
宁荣辉%翁雪涛%朱石坚%李海峰
寧榮輝%翁雪濤%硃石堅%李海峰
저영휘%옹설도%주석견%리해봉
间距%有限元/边界元%声辐射%声功率%辐射效率
間距%有限元/邊界元%聲輻射%聲功率%輻射效率
간거%유한원/변계원%성복사%성공솔%복사효솔
spacing%FEM/BEM%sound radiation%sound power%radiation efficiency
轴系振动是水下结构振动声辐射的主要因素之一。为研究轴系轴承间距对水下结构振动声辐射的影响,建立了轴系的有限元模型,以及水下结构的流固耦合模型。利用有限元/边界元的方法,分析计算了水下结构的辐射声功率级、均方法向速度级和100 m场点处辐射声压级,以及结构声辐射效率。结果表明:轴承间距在一定范围内变化,水下结构的辐射声功率级、均方法向速度级和100 m处辐射声压级的峰值频率也随之变化。
軸繫振動是水下結構振動聲輻射的主要因素之一。為研究軸繫軸承間距對水下結構振動聲輻射的影響,建立瞭軸繫的有限元模型,以及水下結構的流固耦閤模型。利用有限元/邊界元的方法,分析計算瞭水下結構的輻射聲功率級、均方法嚮速度級和100 m場點處輻射聲壓級,以及結構聲輻射效率。結果錶明:軸承間距在一定範圍內變化,水下結構的輻射聲功率級、均方法嚮速度級和100 m處輻射聲壓級的峰值頻率也隨之變化。
축계진동시수하결구진동성복사적주요인소지일。위연구축계축승간거대수하결구진동성복사적영향,건립료축계적유한원모형,이급수하결구적류고우합모형。이용유한원/변계원적방법,분석계산료수하결구적복사성공솔급、균방법향속도급화100 m장점처복사성압급,이급결구성복사효솔。결과표명:축승간거재일정범위내변화,수하결구적복사성공솔급、균방법향속도급화100 m처복사성압급적봉치빈솔야수지변화。
Shafting vibration is one of the main causes of underwater structure vibra‐acoustic radiation . In order to study the effect of shafting bearing spacing on the vibration acoustic radiation of underwa‐ter structure ,a finite element model of shaft system is established ,as well as a fluid‐structure interac‐tion model of underwater structure .And then the radiated sound power level ,the mean‐square veloci‐ty level ,the radiated sound pressure level at 100‐meter field point and the acoustic radiation efficiency of the underwater structure are calculated through the method of FEM/BEM .The results show that as the bearing spacing changed within a certain range ,the peak frequency of the radiated sound power level ,the mean‐square velocity level ,the radiated sound pressure level at 100 meter field point and the acoustic radiation efficiency of the underwater structure also changed linearly .