调制气流声源相控阵的非线性声场特性及调制研究

项目名称： 调制气流声源相控阵的非线性声场特性及调制研究

项目编号： No.11274387

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 蔡清裕

作者单位： 湖南大学

项目金额： 80万元

中文摘要： 调制气流声源是一种经典的频谱可控的大功率强声源，如采用相控阵技术进行组阵，可充分发挥优势，在反恐维稳等军事和民用领域有着重大的应用前景，研究调制气流强声源相控阵有很强的应用背景和重要的学术价值。涉及到的理论问题包括声源调制信号对声源内部复杂的频率相关瞬态流场演化、阵元的输入输出特性对阵列声源声场模式的影响及联系；在一定的阵列形式（分布与数量）和目标的区域特性、声场模式需求下，反演相控阵列各个阵元激励信号的幅值和相位调制技术等。目前国内外尚未开展这方面的研究。本项目旨在建立调制式气流强声源自身的耦合场的理论模型和计算模型，建立调制式气流强声源复杂的频率相关的瞬态流场演化与声源阵元声场模式的关系，不同组阵形式的声场模式特性与振动系统激励调制之间的对应关系，为调制式气流相控阵强声源的工程实现奠定坚实的理论基础和技术基础。

中文关键词： 调制气流声源；相控阵；非线性；强声源；

英文摘要： The air-modulated source speaker is a classic frequency spectrum adjustable high-power acoustic source, if a phased array is adopted, we can exert the advantages, and we can expect a foreground of using in the field of military and civil especially in the anti-terrorism. The research on the air-modulated source speaker based phased array has important application background and considerable academic merit. The first related theoretic problem includes the effects and inter-relations between: modulating signal of source and the frequence-related instantaneous development in the source; the input-output characteristics of the array unit and the pattern of source array acoustic field. Another problem is that based on certain array form, including the distribution and number, and on the basis of the requirement of target field characteristics and mode of acoustic field, how to invert the amplitude and phase of inspiring signal of each array unit and the phase modulation technology. There is no relative research on these aspects in the world up to now. This project intends to develop the theoretic and calculation model of the air-modulated source speaker's coupled field itself, the relationship between the frequence-related instantaneous development and the pattern of source array acoustic field in the array unit, t

英文关键词： air-modulated speaker；phased array；nonlinear；intensive acoustic source；