船海工程
船海工程
선해공정
SHIP & OCEAN ENGINEERING
2014年
2期
7-12
,共6页
苏楠%庞福振%王毅娜%叶亚龙
囌楠%龐福振%王毅娜%葉亞龍
소남%방복진%왕의나%협아룡
声学无限元法%加筋圆柱壳体%振动声辐射%结构参数
聲學無限元法%加觔圓柱殼體%振動聲輻射%結構參數
성학무한원법%가근원주각체%진동성복사%결구삼수
acoustic infinite element method%stiffened cylindrical shells%vibration-acoustic radiation%structural parameters
以无限长圆柱壳体为研究对象，基于声学无限元法利用数值计算方法对其结构外声场进行分析，对加筋圆柱壳的振动和远场水下噪声特性进行研究，讨论外壳厚度、内壳厚度、托板厚度、型材尺寸等结构参数对壳体表面振动均方加速度级及远场辐射声压级的影响。结果表明：改变外壳厚度参数对其表面振动均方加速度级及远场辐射声压级影响最大。
以無限長圓柱殼體為研究對象，基于聲學無限元法利用數值計算方法對其結構外聲場進行分析，對加觔圓柱殼的振動和遠場水下譟聲特性進行研究，討論外殼厚度、內殼厚度、託闆厚度、型材呎吋等結構參數對殼體錶麵振動均方加速度級及遠場輻射聲壓級的影響。結果錶明：改變外殼厚度參數對其錶麵振動均方加速度級及遠場輻射聲壓級影響最大。
이무한장원주각체위연구대상，기우성학무한원법이용수치계산방법대기결구외성장진행분석，대가근원주각적진동화원장수하조성특성진행연구，토론외각후도、내각후도、탁판후도、형재척촌등결구삼수대각체표면진동균방가속도급급원장복사성압급적영향。결과표명：개변외각후도삼수대기표면진동균방가속도급급원장복사성압급영향최대。
The numerical method was adopted to study the sound radiation pressure of an infinitely long cylinder , and the a-chieved results agree well with analytic solutions .Based on the acoustic infinite element method , the stiffened cylindrical shell's vibration and far-field underwater noise characteristics was studied , and the effects of the outer shell and inner shell thickness , plate thickness, profile dimension on the surface of the shell vibration mean-square acceleration level and the far field sound pres-sure level of radiation were discussed .The results showed that the vibration of outer-shell thickness has greatest influence on the shell acceleration mean square parameter on the surface level and the far field radiation sound pressure level .
