摘要
为抑制声呐设备中障板受舰船振动、噪声激励而产生的声辐射,将障板转化成简支薄板模型,分析其在谐波激励下的声辐射。在简支薄板表面粘贴压电片作为致动器,根据所处位置的速度确定输入控制电压,并使平板的体积速度为零,从而达到控制声辐射的目的。进行了数值仿真,仿真结果表明,应用压电片能有效地抑制声呐设备中障板声辐射,抑制中低频的声辐射效果更好。
In order to control sound radiation from a baffle in sonar equipment excited by vibration and noise from a ship, the baffle was modeled as a simply supported rectangular thin plate and its radiation characteristics were analytically investigated. Piezoelectric elements were bonded on the plate as actuators and the input voltage of each actuator was determined by the velocity of its position and volume velocity of the plate was made zero, through which the sound radiation from the plate could be controlled. Numerical simulations were performed and results show that significant attenuation of radiated acoustic power can be obtained, and sound radiation cancellation performance becomes better in low and medium frequencies.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2006年第6期1015-1018,共4页
Acta Armamentarii
基金
国家自然科学基金资助项目(50275131)
国防科技重点实验室基金项目(51446020101JW0404)
关键词
振动与波
声障板
压电致动器
声辐射
体积速度
主动控制
vibration and wave
baffle
piezoelectric element
sound radiation
volume velocity
active control
