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

该提案要求资金允许安德鲁·F·。 Seybert，大学机械工程系 和本杰明·索纳克博士，工程物理 印度尼西亚万隆理工学院， 开展为期24个月的合作研究， 声学中的边界元法（也称为 积分方程方法）。 PI将利用BEM来 制定和解决几种类型的多域和 薄体问题。 对于多域 问题，感兴趣的声学域是内部的一个 任意形状的闭合曲面，在闭合曲面的外部， 体，或者耦合到另一个域。 对于瘦体 问题，声学域是身体的外部， 最小的尺寸是相同的顺序或小于一些 数值参数，如元素长度。 通过边界元法， 三维问题是在两个 域的三维边界，从而简化 计算。 合作者还将尝试 确定如何利用特殊矩阵技术， 提高边界元法的计算速度。 多域问题求解方法的发展 和薄体声学问题将有利于 广泛的具体工程问题。 这些包括 辐射声压和辐射功率的预测 发动机、泵和压缩机等工业产品 当部分地被用于噪声控制的外壳遮盖时; 车辆和飞机的安静内部设计; 了解如何在活动中使用多个源 振动/主动噪声控制;以及 声学通道的复杂网络的优化 例如发生在消声器内部的那些， 发动机进气系统和风扇消音器。 的 研究人员是备受尊敬的工程师， 过去曾成功合作过。 Soenarko博士是一位 他是一位经验丰富的实验学家， 飞机制造业，并了解实际的性质， 研究 塞伯特博士的团队将受益于 Soenarko博士在实验方法和 验证。 该项目增加了一个国际合作组织， 根据NSF Grant No. MSM-8810909。 该项目与目标相关 发展中国家科学计划， 加强与美国的合作。 科学家和工程师以及 发展中国家通过科学交流， 信息、想法、技能和技术， 在互惠互利的问题上进行合作。

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.