爆炸气泡帷幕对水中冲击波能量的衰减特性

在传统气泡帷幕减震技术的基础上,提出了爆炸气泡帷幕削能新理念,并对爆炸气泡帷幕削能设想进行了实验研究,发现在本实验条件下爆炸气泡帷幕能有效衰减冲击波峰值压力,且衰减量高达60%,对冲击波比冲量的衰减高达62.2%;采用小波包分解技术对爆炸气泡帷幕的削能效果进行评判,发现爆炸气泡帷幕对各频段的冲击波能量衰减效果明显,绝大部分频段的能量衰减都在50%以上;爆炸气泡帷幕能够有效消除水下爆炸冲击波的高频部分,爆炸冲击波通过爆炸气泡帷幕后只有低频成分,且低频成分能量大大削弱。

Attenuation Characteristics of Underwater Explosion Bubble Curtain on the Shock

Based on the traditional shock absorption technology of air bubbles curtain, a new energy attenuation idea about air bubbles curtain generated by blasting was put forward. According to the conditions in the paper, the experiment was carried on to test this energy attenuation idea. Results showed that the explosion air bubbles curtain can reduce the peak pressure of shock wave, and the signal attenuation is as high as 60%,the specific impulse of shock wave by 62.2%. When wavelet packet decomposition technique is adopted to judge the attenuate effect of explosion air bubbles curtain, it can be concluded that explosion air bubbles curtain can attenuate different frequency shock wave effectively. Most shock waves of different frequency can be attenuated by more than 50%. Explosion air bubbles curtain can eliminate the high frequency part of the underwater explosion shock wave effectively. Only the low frequency part can pass the explosion air bubbles curtain, but the energy of it can be also weakened greatly.