鱼雷命中后舰船的载荷计算和剩余强度评估

Load calculation and residual strength evaluation of warship damaged by torpedo

以某舰船为例,计算了鱼雷在舰船底部非接触爆炸使舰体结构产生破损后由于进水引起的浮态和载荷变化,给出了鱼雷命中破损后波浪弯矩随不同破损部位、不同进水体积的变化规律.计算了破损舰船的弹塑性极限弯矩,并对舰船的剩余强度进行了评估.计算结果表明,鱼雷命中的最危险位置是船中,外载荷的增大和结构承载能力的减小使舰体结构在单发命中时也可能失效.

The floating parameters and wave load of a warship damaged by a non-contact exploding torpedo are studied by Vlasov＇s method, and the rules of bending moment varied by different damage position and different volume of damaged parts caused by explosion are given. The elastic and plastic ultimate bending moments are calculated, and the evaluation of residual strength of the warship damaged by one torpedo is carried out. The results show that the most dangerous position attacked by torpedo is the middle section. The increase of sagging bending moments and decrease of residual strength of the hull structure can make the structure collapse even the warship is only damaged by one torpedo.