CAJ | 학술논문

基于径向形函数可任意变阶的映射声无限元法，对加筋双层圆柱壳的振动声辐射特性进行分析。取无限长圆柱壳体为研究对象，基于映射声无限元法，通过数值计算法对其辐射声场进行研究分析；并将其数值结果与解析解进行对比分析，结果显示二者吻合较好，验证了本文方法的可行性，同时发现此方法具有计算精度好、效率高等优点。在此研究基础上，基于映射变阶声无限元法，对加筋双层圆柱壳的内壳振动特性和远场声辐射特性进行分析，分别讨论内外壳厚度、型材尺寸和托板厚度对加筋双层圆柱壳内壳体表面振动均方加速度级及远场辐射声压级的影响，其分析结果表明，内壳厚度结构参数对其内表面振动均方加速度级及远场辐射声压级的影响最明显。
기우경향형함수가임의변계적영사성무한원법，대가근쌍층원주각적진동성복사특성진행분석。취무한장원주각체위연구대상，기우영사성무한원법，통과수치계산법대기복사성장진행연구분석；병장기수치결과여해석해진행대비분석，결과현시이자문합교호，험증료본문방법적가행성，동시발현차방법구유계산정도호、효솔고등우점。재차연구기출상，기우영사변계성무한원법，대가근쌍층원주각적내각진동특성화원장성복사특성진행분석，분별토론내외각후도、형재척촌화탁판후도대가근쌍층원주각내각체표면진동균방가속도급급원장복사성압급적영향，기분석결과표명，내각후도결구삼수대기내표면진동균방가속도급급원장복사성압급적영향최명현。
This paper adopts the mapped variable acoustic infinite element method to analyze the acous-tic-vibration characteristics of stiffened double cylindrical shells. First,the sound radiation pressure of an infinitely long cylinder is obtained via numerical analysis with the mapped acoustic infinite element meth-od. The numerical results agree well with the analytic solutions,which proves the validity and precision of the method. Based on the mapped acoustic infinite element method,the paper then analyzes the stiffened double cylindrical shell's vibration and far-field underwater noise characteristics,where the effects of the outer shell and inner shell thickness,plate thickness,ring-stiffener's dimension on the mean-square ac-celeration level of surface shell vibration and the influence on the far field sound pressure level of radiation are discussed. The results show that the vibration of inner-shell thickness has the greatest influence on the above mentioned parameters.