摘要
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。
Even if the trajectory, rocket shape, bubble generation, development, retro-reflection and col- lapse 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 meth- od. 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 sec- ond by added mass and added damping. The modified method and the direct transform method were com- pared. The results show that their difference can not be ignored. It provided a beneficial reference for load calculation of submarine launched missile.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2012年第8期916-920,共5页
Acta Armamentarii
关键词
固体力学
潜射导弹
缩比模型试验
相似律
动力响应
流固耦合
solid mechanics
submarine launched missile
scaled model test
similarity law
dynamicresponse
fluid-structure interaction
