【摘要】 为了提高地面力学环境试验的效率、缩短试验周期、降低试验成本，直接声场试验技术近年来得到国内外学者的广泛关注。直接声场试验是一种不需要混响室或行波管等大型基建和复杂的高压大流量气源系统，只需将试件置于电动扬声器组成的阵列内，通过电声场对产品进行噪声激励的便捷的噪声试验方法。本文开展了直接声场模拟试验技术与噪声试验有效性分析研究，设计了直接声场模拟试验方案并搭建了试验系统，验证了直接声场试验方法的有效性。为卫星噪声试验、声振联合试验提供高效可靠的噪声试验解决方案和技术支撑。更多还原

【Abstract】 In order to improve the efficiency of the mechanical environment simulation test, shorten the experimental period, and reduce the cost of the test, direct field acoustic testing technology has received more and more attention from the researchers. Direct Field Acoustic Testing(DFAT) is a convenient acoustic test method that does not require a reverberation chamber, a traveling-wave tube or the Nitrogen gas source. It is only need to place the loudspeaker array around the test product, and the electric speakers perform the acoustic excitation on the product through the direct field. This report illustrates the DFAT and the acoustic test effectiveness analysis research, designs the DFAT program. The DFAT test system is built, and the efficiency of DFAT is verified. This technology provides the efficient and reliable acoustic test solution and technical support for the acoustic test and vibration-acoustic-combination test.更多还原