U.S.-Indonesia Cooperative Research in Boundary Element Methods in Acoustics

这项提案要求提供资金，允许肯塔基大学机械工程系安德鲁·F·塞伯特博士和印度尼西亚万隆理工学院工程物理系本杰明·索纳科博士在为期24个月的时间内，声学中边界元方法(BEM)(也称为积分方程法)的合作研究。PI将利用边界元法来描述和解决声学中的几种类型的多域和薄体问题。对于多域问题，感兴趣的声学域位于任意形状的闭合曲面的内部、闭合物体的外部或耦合到另一域。对于薄体问题，声学域位于其最小尺寸为相同量级或小于某一数值参数(如单元长度)的物体的外部。用边界元方法求解二维边界上的三维问题，简化了计算。合作者还将尝试确定如何利用特殊的矩阵技术来提高边界元的计算速度。多域和薄体声学问题的求解方法的发展将有利于解决广泛的具体工程问题。这些内容包括：预测发动机、泵和压缩机等工业产品的声压和功率，当这些产品被噪声控制外壳部分遮盖时；车辆和飞机安静的内部设计；了解如何将多种声源用于主动振动/主动噪声控制；以及复杂的声学通道网络的设计和优化，如消声器、发动机进气系统和风扇消声器的内部。研究人员都是备受尊敬的工程师，他们过去曾成功合作过。索纳尔科博士是一名经验丰富的实验者，曾与航空业密切合作，深谙这项研究的实际意义。Seybert博士的团队将受益于Soenarko博士在实验方法和验证方面的经验。该项目为美国国家科学基金会赠款编号为正在进行的研究增加了一个国际合作层面。MSM-8810909。该项目与发展中国家科学计划的目标相关，该计划旨在通过交流科学信息、思想、技能和技术，以及通过在互利问题上的合作，提高美国科学家和工程师与发展中国家同行之间的合作水平。

This proposal requests funds to permit Dr. Andrew F. Seybert, Department of Mechanical Engineering, University of Kentucky, and Dr. Benjamin Soenarko, Engineering Physics Department, Bandung Institute of Technology, Indonesia, to pursue, for a period of 24 months, cooperative research on boundary element methods (BEM) in acoustics (also known as integral equation methods). The PI's will utilize BEM to formulate and solve several types of multi-domain and thin-body problems in acoustics. For the multi-domain problem, the acoustic domain of interest is interior to a closed surface of arbitrary shape, exterior to a closed body, or coupled to another domain. For the thin-body problem, the acoustic domain is exterior to a body whose smallest dimension is of the same order or less than some numerical parameter such as element length. By using BEM, three dimensional problems are solved on the two dimensional boundary of the domain, thus, simplifying computations. The collaborators also will attempt to determine how to utilize special matrix techniques to increase the computational speed of the BEM. The development of methods for the solution of multi-domain and thin-body acoustic problems will be beneficial to a wide range of specific engineering problems. These include the prediction of sound pressure and power radiated by industrial products such as engines, pumps, and compressors when partially shrouded by an enclosure for noise control; design of quiet interiors of vehicles and aircraft; understanding how multiple sources may be used in active vibration/active noise control; and the design and optimization of complex networks of acoustic passageways such as those that occur in the interior of mufflers, induction systems of engines, and silencers for fans. The researchers are highly respected engineers who have successfully collaborated in the past. Dr. Soenarko is a skilled experimentalist who has worked closely with the aircraft industry and understands the practical nature of the research. Dr. Seybert's team will have the benefit of Dr. Soenarko's experience in experimental methods and validation. This project adds an international cooperative dimension to ongoing research under NSF Grant No. MSM-8810909. This project is relevant to the objectives of the Science in Developing Countries Program which seeks to increase the level of cooperation between U.S. scientists and engineers and their counterparts in developing countries through the exchange of scientific information, ideas, skills, and techniques and through collaboration on problems of mutual benefit.