CAJ | 학술논문

简要介绍了有限元声振耦合和结构振-声传递路径分析（TPA）的基本理论。基于CAE技术建立了TPA模型，通过ANSYS声振耦合的谐响应分析，获得水下双层圆柱壳体振动响应和声场中的声压响应，利用矩阵条件数曲线优选测点位置，并结合奇异值修正的方法改善频响函数矩阵病态问题，求得振源的耦合激励力和振—声频响函数。由自编TPA程序计算得到两个振源作用下目标点的合成噪声响应与ANSYS实际计算吻合很好。利用频谱贡献云图、矢量叠加图及数据对比的方式分析了传递路径对壳外目标点噪声的贡献，从传递路径的角度找出了对壳外噪声起主导作用的环节。可见，基于CAE方法的水下双层圆柱壳体结构振-声TPA方法具有精度高、易操作、成本低等优点，对潜艇的优化设计、运行管理、针对性的维修均具有十分重要的意义。
간요개소료유한원성진우합화결구진-성전체로경분석（TPA）적기본이론。기우CAE기술건립료TPA모형，통과ANSYS성진우합적해향응분석，획득수하쌍층원주각체진동향응화성장중적성압향응，이용구진조건수곡선우선측점위치，병결합기이치수정적방법개선빈향함수구진병태문제，구득진원적우합격려력화진—성빈향함수。유자편TPA정서계산득도량개진원작용하목표점적합성조성향응여ANSYS실제계산문합흔호。이용빈보공헌운도、시량첩가도급수거대비적방식분석료전체로경대각외목표점조성적공헌，종전체로경적각도조출료대각외조성기주도작용적배절。가견，기우CAE방법적수하쌍층원주각체결구진-성TPA방법구유정도고、역조작、성본저등우점，대잠정적우화설계、운행관리、침대성적유수균구유십분중요적의의。
Basic theory of vibration-acoustic coupling of finite element method and structural transfer path analysis (TPA) were described and a TPA model was established based on CAE technology. Vibration re-sponse of a submerged cylindrical double-shell and pressure response in the acoustic field were acquired by the harmonic response analysis of vibration-acoustic coupling of ANSYS. With the optimal position of reference points is selected by the curve of matrix condition number and the modified singular value method was used to improve the ill-posed problem of FRF matrix, the coupled excitation force and vibra-tion-acoustic FRF were obtained. The results of target response under the action of two vibration sources are calculated by TPA program, which are in good agreement with the results computed by ANSYS. The sound contribution of each transfer path to external noise of the cylindrical double-shell is analyzed by us-ing spectral contribution nephogram and vector superposition chart. The multiple transfer paths which play a leading role in external noise are finally determined. The results indicate that the vibration-acoustic TPA method of the submerged cylindrical double-shell based on CAE technology have high efficiency, good ac-curacy, etc, which is of great significance in optimization of submarine design, operation management and targeted repair.