CAJ | 학술논문

为了降低艇体的振动噪声，建立了复合材料圆柱壳的有限元模型，并对其水下振动和声辐射特性进行了研究。在此基础上，分析了复合材料圆柱壳水下声辐射的优化模型；基于遗传优化算法，以复合材料铺层角度为设计变量，以流固耦合面内辐射声压的最大值为优化目标，进行了优化分析。结果表明：对复合材料圆柱壳的铺层角度进行优化设计可以有效提高其声辐射性能，相比对称铺层方式，优化后的远场辐射声压级在50～300 Hz频段内平均降低了3．6 dB。该结果验证了优化设计的有效性，为下一步进行大型复杂水下结构的声辐射优化研究提供了一定的思路。
위료강저정체적진동조성，건립료복합재료원주각적유한원모형，병대기수하진동화성복사특성진행료연구。재차기출상，분석료복합재료원주각수하성복사적우화모형；기우유전우화산법，이복합재료포층각도위설계변량，이류고우합면내복사성압적최대치위우화목표，진행료우화분석。결과표명：대복합재료원주각적포층각도진행우화설계가이유효제고기성복사성능，상비대칭포층방식，우화후적원장복사성압급재50～300 Hz빈단내평균강저료3．6 dB。해결과험증료우화설계적유효성，위하일보진행대형복잡수하결구적성복사우화연구제공료일정적사로。
In order to reduce the vibration and noise of submarines ,a FEM model of composite lami-nated cylindrical shell is established .The model is used for the investigation into its underwater vibra-tion and sound radiation .Based on the genetic algorithm (GA) ,the structural-acoustical optimization model is presented ,with the angle of laminated layers as design variable and the maximum sound pressure on the coupled interface as an object of optimization .The result shows that the optimizing design of the angle of the composite laminated cylindrical shell can improve its sound radiation effec-tively ,compared with the symmetrical laminated angle .The optimized far-field pressure level reduces 3 .6 dB on average in the frequency band of 50 Hz to 300 Hz .Therefore ,this optical design can pro-vide a certain reference for further study of the optimization of sound radiation from a large complex underwater structure .