干扰弹发射过程中飞机弹舱结构损伤研究

针对发射干扰弹时飞机弹舱腹板可能出现损伤的情况，对弹舱腹板受载情况和动力学响应进行了分析。开展了干扰弹发射时的冲击波载荷和金属腹板响应原理试验，对试验进行了数值模拟，模拟结果与试验结果较吻合，并进一步分析了实际弹舱腹板结构在冲击波作用下可能出现的最大响应。根据弹舱空腔结构的非定常流场仿真所得的脉动压力功率谱密度载荷，计算了弹舱腹板在不同飞机构型脉动压力作用下的应力均方根值。分析结果表明：弹舱空腔结构所产生的脉动压力是造成弹舱腹板结构损伤的主要原因。根据分析结果，给出了干扰弹舱结构改进建议。

Study on structural damage of jammer projectile chamber in the course of launching jammer projectile

Considering the structural damage of the jammer projectile chamber during the launch of the jammer projectile, the loading condition and dynamic response of the jammer projectile chamber webs are analyzed. The shock wave loading and the response of metal web plate during the launch of the jammer projectile are tested, and the numerical simulation results are in good agreement with the experimental results, furthermore, the maximum dynamic response of the actual jammer projectile chamber under the shock wave is obtained. Based on the fluctuating pressure Spectral density loads obtained from the unsteady flow field simulation of the jammer projectile chamber cavity structure, the stress root mean square (RMS) values of the jammer projectile chamber under the fluctuating pressure of different aircraft conditions were calculated. The results show that the fluctuating pressure caused by the cavity structure of the jammer projectile chamber is the main reason for the structural damage of the jammer projectile chamber. According to the analysis results, some suggestions for improving the structure of the jammer projectile chamber are given.