CAJ | 학술논문

在经典的三维水弹性力学理论的基础上,考虑水介质的可压缩性,形成通常所说的水中声弹性理论.提出带航速和考虑自由液面影响的,承受机械和波浪等多种载荷激励下的浮体流固耦合振动及水下辐射噪声计算方法;并介绍了一种消除简单源数值算法中非规则频率现象的方法.针对无限大流体中的弹性球壳结构声辐射模型进行一系列数值计算,通过与解析结果的比较,验证了计算方法的正确性.在此基础上,计算了一机械激励下双层加筋圆柱壳的水下辐射噪声,并根据数值结果,对近、远场声特性进行了讨论.
재경전적삼유수탄성역학이론적기출상,고필수개질적가압축성,형성통상소설적수중성탄성이론.제출대항속화고필자유액면영향적,승수궤계화파랑등다충재하격려하적부체류고우합진동급수하복사조성계산방법;병개소료일충소제간단원수치산법중비규칙빈솔현상적방법.침대무한대류체중적탄성구각결구성복사모형진행일계렬수치계산,통과여해석결과적비교,험증료계산방법적정학성.재차기출상,계산료일궤계격려하쌍층가근원주각적수하복사조성,병근거수치결과,대근、원장성특성진행료토론.
Sono-elasticity theory in water based on the classic three dimensional hydroelasticity con-sidering compressibility of the water medium is formed. Put forward a method that calculates the acoustic responses of a floating body induced by the machinery and wave excitations, with forward speed and free surface. At the same time, a method for eliminating the irregular frequencies in the numerical analysis is proposed. The acoustic radiation of an elastic spherical shell in infinite fluid is predicted and compared with analytical solution for validation. The acoustic radiations of a submerged ring-stiffened cylindrical hull is also calculated, and according to the numerical results the near field and far filed acoustic characteristics are discussed.