中文摘要：

对一种新型的弯张换能器即欧米伽换能器的辐射特性进行了有限元分析,并与钹式换能器进行对比。通过有限元计算,对相同体积的欧米伽换能器与钹式换能器的电导纳、发射电压响应级以及接收灵敏度级进行了对比,结果表明：欧米伽换能器的低频性能和第一谐振频率处的接收灵敏度要好于钹式换能器,而发射电压响应要低于钹式换能器,比钹式换能器更好地解决了小体积与低工作频率之间的矛盾,更宜实现基阵的小型化。舰船的机械噪声主要集中在500Hz以下,体积较小的欧米伽换能器非常适合作为侦察舰船活动的被动声纳基元。

英文摘要：

The sound radiation of a new type of flextensional transducer--the Omega transducer is analyzed via finite element method. The Omega transducer is also compared with the cymbal transducer. In the case where they have the same volume, the comparisons of the admittance, the free field voltage sensitivity and the transmitting voltage response are made. The results show that the performances at low frequency and the free field voltage sensitivity of the Omega transducer are better than that of the cymbal transducer at the first resonance frequency, but the transmitting voltage response of the former is lower than that of the latter. The Omega transducer provides a better way out of the dilemma between the small volume and the low operation frequency. So, the Omega transducer is very suitably as a passive sonar element used for detecting the motion of the ship with mechanical noise below 500Hz.