Sizov Natalia V, Plotkin Kenneth J, Hobbs Christopher M
Wyle Laboratories, Arlington, Virginia 22202, USA.
J Acoust Soc Am. 2010 Jun;127(6):3347-55. doi: 10.1121/1.3409733.
Human perception of sonic booms is a major impediment to commercial supersonic flight. Shaping, which reduces the audible shock waves of a boom, can make outdoor perception of booms acceptable. Perception of sonic booms experienced indoors is of concern, and it is not yet established whether shaped booms offer benefit to indoor listeners. A better understanding of the transmission of shaped booms into building structures is needed. In the authors' earlier work the vibration response of house elements subjected to different sonic boom wave shapes was evaluated using a single degree of freedom model. This paper expands that approach with a modal analysis model. The acceleration of building elements and the resulting sound pressure inside a room are computed in the time and frequency domains. Analytical results are compared with experimental data measured by NASA during sonic boom tests conducted at Edwards Air Force Base in 2007. The effects of wave signature parameters on transmission are studied to evaluate the advantages of various kinds of minimized boom shapes.
人类对音爆的感知是商业超音速飞行的主要障碍。整形，即减少音爆的可听冲击波，可使户外对音爆的感知变得可接受。室内对音爆的感知也受到关注，目前尚不清楚整形后的音爆对室内听众是否有益。需要更好地了解整形后的音爆在建筑结构中的传播情况。在作者早期的工作中，使用单自由度模型评估了房屋构件在不同音爆波形作用下的振动响应。本文用模态分析模型扩展了该方法。在时域和频域中计算建筑构件的加速度以及室内产生的声压。将分析结果与美国国家航空航天局（NASA）2007年在爱德华兹空军基地进行音爆测试时测得的实验数据进行比较。研究波特征参数对传播的影响，以评估各种最小化音爆形状的优势。
