High Frequency Methods for Solutions to Structural-Acoustic Systems with Significant Damping

高频方法解决结构声学系统的显着阻尼本研究的目的是开发新的分析工具，解决结构动力学和声学问题，受到高频宽带激励，具有高模态密度，并不是轻阻尼。 这种系统是运输和飞行器中实际遇到的典型系统。 目前，人们对这些系统的了解很少，只能使用需要大量计算的方法来精确求解。 该项目包含理论，计算和实验工作。 两个平行的努力将进行：一个使用边界元制定的时间平均的能量/强度变量，和其他扩展渐近模态分析的情况下，模式不解耦。 除了开发一种简单有效的方法来解决具有大量阻尼的高模态密度系统外，这项工作还将侧重于理解所涉及的机制，并深入了解这些高频系统的行为。

High Frequency Methods for Solutions to Structural-Acoustic Systems with Significant DampingThe objective of this research is to develop new analysis tools for solving structural dynamics and acoustics problems that are subjected to high frequency broadband excitations, have high modal density, and are not lightly damped. Such systems are typical of those actually encountered in transportation and flight vehicles. Currently, these systems are poorly understood and can only be solved accurately using methods requiring extensive computation. The project contains theoretical, computational, and experimental work. Two parallel efforts will be undertaken: one using boundary elements formulated from time-averaged energy/intensity variables, and the other extending asymptotic modal analysis to cases where the modes are not uncoupled. In addition to the development of a simple, efficient approach to solving high modal density systems with significant amounts of damping, the work will focus on understanding the mechanisms involved and gaining insights into the behavior of these high frequency systems.