水下爆源位置诱导舰艇总强度鞭状响应规律

基于速度势函数和 Morison相对速度公式,提出了气泡载荷水动力的计算方法,给出了用 Newmark数值求解法求解水下爆炸气泡载荷作用下船体梁动态响应的方法。经模型试验验证后,针对药包在船体梁模型中部位置的情况,研究了炸药深度、爆距和爆点轴向位置对鞭状运动响应的影响规律。研究发现:在其他条件不变的情况下,结构鞭状运动应变幅值随着周期比先增加后减小；鞭状运动应变幅值和长度比呈反比例函数关系；船体梁鞭状运动响 应应变幅值随着长度比先增大后减小。

Overall Whip Response Law of Underwater Detonation Source Position Induced Ship

Based on the velocity potential function and Morrison''s relative velocity formula, a method to calculate the hydro.dynamic force of bubble load is proposed, and a Newmark numerical solution method to solve the dynamic response of hullgirder under bubble load of the underwater explosion is given. After model tests, the influence of explosive depth, blast dis.tance and the axial position of the blast point on the whipping response are studied for the middle position of the charge inthe hull girder model. It is found that the strain amplitude of whipping motion increases first and then decreases with the pe.riod ratio when other conditions remain unchanged. The strain amplitude and length ratio of whipping motion are inverselyproportional function. The strain amplitude of the whipping response of the hull girder increases first and then decreaseswith the length ratio.