Constructing a benchmark platform on computational methods for architectural/environmental acoustics

通过该项目，在万维网上建立了一套基准问题，可以相互比较有限差分法、有限元方法、边界单元法等各种声学方法的计算精度和效率。2003财政年度，作为项目的第一阶段，该平台被设计为由25个问题组成，分为三类：“A外部”、“B内部”和“C结构”，有“频率”和“时间”两个域。此外，还提供了“任务”，使进一步的扩展更容易。利用为项目成员提供有组织的计算环境的工作站，进行了几次试算，以提供作为平台内容的可比数据。总结了该项目的活动和成果概要，并将其作为论文提交给将于2004年春季举行的ICA和RADS国际会议。然后，在2004财政年度，对这10个问题进行了进一步计算，并改进了几个问题。还增加和改进了内容，即可下载的Excel格式文件中的计算结果，使该平台变得有用。在财政年度结束时，邀请了欧洲教授P.Svensson和S.Marburg，并就该项目举行了一次研讨会，讨论了该项目和计算声学。最后，在2005财政年度，研究了瞬变分析、会议厅的内部问题和形状规则的混响室的内部问题，并将其纳入基准问题。然后，就该项目举行了一个论坛，来自电气、咨询、总承包商和软装等不同公司的人员在论坛上发表了五次演讲，讨论了计算声学在其现场工作中的可用性。

Through the project, a suite of benchmark problems has been established on the world wide web site to allow the mutual comparison of computational accuracy and efficiency of various methods on acoustics, i.e. finite difference method, finite element method, boundary element method, and so on.In 2003 financial year, as the first stage of the project, the platform were designed to consist of 25 problems that are classified into three-categories, "A.exterior," "B.interior" and "C.structural," with two domains, "frequency" and "time." Additionally, "Task" is also available to make further expansion easier. With the workstations that provide organized computational environments for the project members, several trial computations were carried out to give comparable data as to be contents of the platform. The outline of the activity and results of the project were summarized and submitted as papers to international conferences, ICA and RADS, to be held in spring 2004.Then, in 2004 financial year, further computations on the 10 problems were carried out and several problems were refined. Contents, i.e. computed results in downloadable Excel-format files, were also added and refined to make the platform useful. At the end of the financial year, European professors, P.Svensson and S.Marburg, were invited and a symposium on the project was held to discuss about both the project and computational acoustics.Finally, in 2005 financial year, transient analysis, interior problem in a convention hall and interior problem in a regularly shaped reverberation room, were examined and added as to be included in the benchmark problems. Then, a forum was held on the project, and at the forum five presentations were given by people from various companies, i.e. electrical, consulting, general contractor and soft-wear, to discuss about the availability of computational acoustics in their field works.