论文标题
由于湍流边界层激发涉及Cholesky分解而引起的层压复合板的VIBRO声音反应预测的Fe-Be方法耦合方法
A coupled FE-BE approach for vibro-acoustic response prediction of laminated composite panels due to turbulent boundary layer excitation involving Cholesky decomposition
论文作者
论文摘要
在本研究工作中开发了一个原始的数值框架，以估算受到湍流边界层引起的激发的困扰的结构面板的自由磁场辐射。一种半分析方法用于估计使用Cholesky技术分解的TBL壁压力谱，以在频域中获得随机壁压。结构面板是使用有限元技术建模的，并开发了耦合的有限元元素元素建模技术，以估计声音电平辐射到自由场中。对于具有各种纤维取向的层压复合结构面板获得了结果，并讨论了显着的发现。开发的技术有可能进一步扩展复杂的结构，从几何，材料特性和边界条件方面。在内部MATLAB环境中开发的完整数值工具箱可以在早期的设计阶段预测湍流结构声耦合行为。
An original numerical framework is developed in the present research work in order to estimate the free field sound radiation from baffled structural panels subjected to turbulent boundary layer-induced excitation. A semi-analytical method is used to estimate the TBL wall pressure spectrum which is decomposed using Cholesky technique to obtain random wall pressure in the frequency domain. Structural panels are modeled using the finite element technique and a coupled finite element boundary element modeling technique is developed to estimate the sound power level radiating into the free field. Results are obtained for laminated composite structural panels with various fiber orientations and significant findings are discussed. The developed technique has the potential to be further extended for complex structures in terms of geometry, material properties, and boundary conditions. The complete numerical toolbox, developed in an in-house MATLAB environment, enables the prediction of turbulent structure acoustic coupled behavior at an early design stage.
