火箭弹动态特性仿真与试验研究

Dynamic Property Simulation and Test of Rocket

对于大长径比火箭弹,需要获取弹体的固有动态特性,以进一步分析飞行结构强度和飞行稳定性。采用等效质量法简化弹体建立有限元模型进行模态数值仿真解算,同时利用模态识别技术进行弹体的模态试验。试验结果:等效质量法简化火箭弹模型进行模态解算可得到较高精度的弹体自振频率。仿真结果可用于动态强度及飞行稳定性的分析计算。

For rocket with large length-to-diameter ratio structure the, the body＇s inherent dynamic characteris must be gained to calculate the flight intensity and stabilization. The equivalent mass method was adpted to simplify the body, the finite element model was but and the structurd modaling was calculated. The body＇s modal experiments were did using the modal identification technique. Using the equivalent mass method, high-accuracy natural vibration frequency is gained by means of simulation. The results can be used for the body＇s flight intensity and stabilization calculation.