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1 前言 目前已有可能按照确定的板材和频率来设计和制作以水为负载介质的条纹模式矩形振动板,对于使用这种振动板的大容量水中声源,已有若干研究。但是,在声源驱动频率的调整方面仍存在一些问题。要想对条纹模式振动板水下声源加大功率,使之易于驱动,就须使从声源的电端观测的共振频率与振动板的条纹模式共振频率大体一致。不过,当把声源振动板插入到任意形状和大小的水槽时,从声源的电端测量的共振频率是包括水槽共振在内的多个共振频率,因而很难特定为所需要的条纹模式共振频率。
1 Foreword At present it is possible to design and fabricate a stripe-mode rectangular diaphragm with water as the load medium according to the determined plate and frequency. There have been several studies on the sound sources of large volumes of water using such a diaphragm. However, there are still some problems in adjusting the driving frequency of the sound source. In order to increase the power of the underwater sound source of the stripe pattern vibrating plate and make it easy to drive, the resonance frequency observed from the electric terminal of the sound source and the stripe pattern resonant frequency of the vibrating plate should be made substantially uniform. However, when the sound source diaphragm is inserted into a water tank of arbitrary shape and size, the resonance frequency measured from the electric end of the sound source is a plurality of resonance frequencies including the resonance of the water tank, and thus it is difficult to specify the desired fringe pattern Resonance frequency.