学术数据库优秀期刊 《中文科技期刊数据库》来源期刊

To reduce the noise level and vibration of underwater pyrotechnic devices and prevent excessive noise and vibration generated during operation from being detected by enemy sonar equipment, an underwater low-noise pyrotechnic device based on epoxy-based composite materials has been developed. This paper presents experimental research on and the acquisition of parameters for material properties that must be understood during the design of the pyrotechnic device, such as glass transition temperature, return accuracy, and mechanical performance. Based on the obtained parameters, these were applied to the low-noise pyrotechnic device for underwater use. The device utilizes the shape memory property of the epoxy-based material, employing it as the initial locking element of the pyrotechnic device. During the combustion of the pyrotechnic charge, the heat generated heats the material, causing it to deform and lose its locking function, thereby achieving unlocking. Experiments have demonstrated that the noise level of this pyrotechnic device during operation is less than 100 dB (underwater at a distance of 1 m, within the frequency range of 10 Hz–5000 Hz, with a reference sound pressure of 1 μPa), and the separation shock does not exceed 1000g. These indicators are superior to the noise levels and vibration of traditional pyrotechnic devices. Combined with underwater field measurements, the noise is further absorbed under real sea conditions, demonstrating excellent stealth performance. Therefore, this device can be widely applied in military applications such as underwater payload release, providing a new direction and approach for the development of underwater low-noise pyrotechnic devices and serving as an effective complement to shape memory alloys.