Research on the signal characteristics of underwater explosion shock wave near the boundary
In the process of underwater explosion test,the shock wave pressure signal is easy to distort,which makes it difficult to evaluate the test results.By combing the past experimental data,the difference in acoustic impedance of different media is the key factor affecting the shock wave propagation under near-boundary conditions.In the vicinity of the water sur-face,because the acoustic impedance of the air is less than that of the water medium,the shock wave curve will drop sud-denly,resulting in an obvious water surface truncation effect.The surface of the steel structure is affected by the superposi-tion of pressure waves,and the pressure curve will be greatly improved.Due to the complexity of the substrate near the bot-tom of the water,the acoustic impedance varies greatly,and the measured pressure field will be affected by factors such as incident wave,reflected wave,precursor wave,and post-wave disturbance,the waveform curve presents more complex char-acteristics.
万方数据
维普
