水下非接触爆炸的负波对舰船设备破坏的影响  

Effect of Negative Wave Induced by Underwater Non-contact Explosion on Ship Devices' Damage

作　　者：邹斌[1] 闫明[1] 刘栋[1] 金昊[1] 

机构地区：[1]沈阳工业大学机械工程学院,沈阳110870

出　　处：《噪声与振动控制》2016年第2期144-147,共4页Noise and Vibration Control

基　　金：中国博士后基金资助项目(2014M562622)

摘　　要：揭示水下非接触爆炸的负波对舰船设备冲击破坏影响,并分析冲击破坏规律,对舰船设备抗冲击设计及考核具有重要意义。设计不同固有频率的悬臂梁,分别计算在不同负波脉宽和负波延迟时间的冲击载荷作用下梁固定端应力响应,得到负波脉宽与应力、负波延迟时间与应力的关系曲线,同时绘制了相应的冲击响应谱。结果表明:增加负波脉宽可提高冲击载荷对低频设备破坏能力,对中频和高频设备破坏影响不大;负波延迟可加剧低频设备破坏,可降低中频设备破坏,对高频设备破坏无影响;增加负波脉宽和负波延迟时间均可加剧冲击载荷对低频设备的破坏。The influence of negative wave induced by underwater non-contact explosion on ship devices’damage was revealed. The law of shock damage, which has great significance to the design and assessment of shock-resistance for ship devices, was analyzed. The cantilevers with different natural frequencies were designed, and the stress response of the fixed end under the impact loads with different negative wave pulse width and different time-delay was calculated. The curves of the negative wave pulse width and the negative wave time-delay vs. the response stresses were plotted and the corresponding shock response spectrum was drawn. The results show that increasing the negative wave pulse width can raise the damage ability of the shock load to the low-frequency devices, but has little effects on medium and high frequency devices. The negative wave time-delay can increase the damage of the low-frequency devices, but can reduce the damage of medium-frequency devices, and has little effects on the damage of the high-frequency devices. Increasing negative wave pulse width and increasing negative wave time-delay can increase damage ability of the shock load to the low-frequency devices.

关 键 词：振动与波 水下非接触爆炸 负波 舰船设备 冲击响应 延迟时间 

分 类 号：U66[交通运输工程—船舶及航道工程]