Page 35 - 201903
P. 35

第 38 卷 第 3 期                                                                       Vol. 38, No. 3
             2019 年 5 月                          Journal of Applied Acoustics                      May, 2019

             ⋄ 研究报告 ⋄



                共形时域有限差分技术在戏场八字墙中的应用                                                                    ∗






                                                   黄武琼     †   卢义刚


                                               (华南理工大学建筑学院       广州   510640)

                摘要 模拟了一椭圆房间内的声聚焦问题，进行了共形技术与阶梯近似法的比较，结果表明共形技术比传统
                的阶梯近似法更精确，将共形时域有限差分技术引入声波动方程，有利于解决建筑结构中的曲面或者倾斜边
                界的声学问题。在此基础上，建立了含有八字墙的戏台模型，计算模拟了不同角度、不同宽度的八字墙对各个
                测区声场强度的影响。同时，计算分析了几种不同八字墙条件下的早期声能比和侧向能量因子，结果显示当八
                字墙取一定的角度时可加强早期声与侧向反射声，提供了更好的清晰度、空间感等。
                关键词     八字墙，共形，曲面，早期声，侧向反射声
                中图法分类号: TU112           文献标识码: A          文章编号: 1000-310X(2019)03-0317-09
                DOI: 10.11684/j.issn.1000-310X.2019.03.005






                      Application of conformal finite-difference time-domain technology
                                        in the splayed walls of theater field



                                              HUANG Wuqiong LU Yigang


                           (School of Architecture, South China University of Technology, Guangzhou 510640, China)

                 Abstract  Sound focusing problem in an oval room has been simulated through conformal technology and
                 stair approximation method. The results show that conformal technology is more precise than the stair ap-
                 proximation method. Bring the conformal finite-difference time-domain technology into sound wave equations,
                 which is beneficial to solving the problems of curved faces and tilt boundaries in architectural structure. Based
                 on which, stage models have been built containing splayed walls. The influence on sound field intensity in
                 every test area with different angles and different widths has been calculated. Meanwhile, early sound energy
                 ratios and lateral energy factor in several different conditions have been analyzed. The result reveals that the
                 splayed walls can strengthen early sound and lateral refraction when the splayed walls in certain angles, which
                 offers better definition and sense of space.
                 Key words Splayed walls, Conformal, Curve surfaces, Early sound, Lateral refraction







             2018-08-28 收稿; 2018-12-29 定稿
             国家自然科学基金资助项目 (11574089), 北京大学翁洪武科研原创基金项目
             ∗
             作者简介: 黄武琼 (1989- ), 女, 广西北海人, 博士研究生, 研究方向: 建筑声学仿真。
             † 通讯作者 E-mail: wuqiong_huang@foxmail.com
   30   31   32   33   34   35   36   37   38   39   40