中文摘要：

有源声学结构是近年来提出的一种控制结构低频声辐射的有效方案，它是智能结构在有源噪声控制领域的具体应用。次级声源的优化布放是有源声学结构研究中的核心问题，本文对此进行了研究。首先建立了有源声学结构的计算模型，然后基于声辐射模态和结构振动模态理论，推导总结出各种情况下次级声源的最优布放规律，最后用一系列的计算机仿真实例对该规律进行了验证。

英文摘要：

An active acoustic structure, which is an instance of application of intelligent structures to noise control, is a recent and effective approach to the control of structural low-frequency sound radiation. One of the core issues in the study of active acoustic structures is the optimized arrangement of secondary sound sources. Firstly the paper sets up its calculation model, and then arrives at the laws of their optimized arrangement under various conditions through using the sound radiation module and structural vibration module. Finally a number of computer simulation instances verify the validity of the laws.