通过缩比试验数据计算潜射导弹的载荷

即使潜射导弹缩比模型试验中弹道、弹体外形、空泡生成、发育、回射及溃灭规律满足缩比相似律，但由于模型的结构动力学特性相似关系难以满足，导致缩比试验数据难以直接计算原型载荷。提出了一种利用缩比模型试验弹体表面测压数据计算原型弹体横向动力响应的修正计算方法。该算法将测压数据分解为“空泡回射与溃灭” 水动力和与弹体结构振动有关的水动力两部分。通过对第一部分水动力建立确定的数学模型，对第二部分水动力用附加质量和附加阻尼进行表述，基于该算法计算得到了原型弹体的动力响应，并与水动力直接转化算法进行了比较。结果表明二者的差别不可忽视。此方法可为潜射导弹载荷计算提供有益的参考。

Load Calculation for Submarine Launched Missile Based on Scaled Model Test

Even if the trajectory,rocket shape,bubble generation,development,retro-reflection and collapse in the scaled test satisfy the similarity law,the structural dynamic characteristics are hardly similar,thus,the prototype’s load can not be calculated from the test data easily and directly.In this paper,a modified method to calculate the lateral dynamic response of submarine launched missile prototype from the pressure data of scaled model test was presented.The test data was divided into two parts in the method.The first one was related to the bubble retro-reflection and collapse,and the other to the missile body structure vibration.The dynamic response of the prototype was calculated on the basis of the modified method by building mathematical model of the first part of hydrodynamic pressure and expressing the second by added mass and added damping.The modified method and the direct transform method were compared.The results show that their difference can not be ignored.It provided a beneficial reference for load calculation of submarine launched missile.