舰船水下爆炸鞭状运动中的阻尼效应

舰船在水下爆炸气泡脉动压力作用下将产生鞭状运动冲击响应。为了掌握冲击响应的衰减规律,建立了舰船结构、设备、水舱内流体和外部流体等在振动和晃荡过程中的阻尼效应动力学模型,并编写程序对是否考虑上述阻尼效应的舰船鞭状运动响应进行了数值计算。研究结果表明,对于具有相对较大质量的内部设备和水舱的舰船来说,上述阻尼效应对舰船水下爆炸鞭状运动的衰减起到重要的作用,如不予以考虑有可能造成对舰船鞭状运动响应幅值的高估。

Damping Effectson the Whipping Response of Warship Subjected to an Underwater Explosion

The whipping response of a warship subjected to an underwater explosion usually is agitated by the bubble impulse after the explosion shock.A majority of aspects of damping are addressed in regards to their effects on the dynamic response of the warship.The damping mechanisms discussed include hull damping,internal structures,mountings,equipments,water tanks,and external wave radiation and viscous fluid effects.A numerical program is written for the analysis.The numerical results indicate that the damping effects mentioned above play a important roll to the attenuation for the warship whipping with relative large mountings,equipments,and water tanks.