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针对动能子弹对机场跑道的侵彻问题,提出一种与试验相结合的工程算法。该算法基于空腔膨胀理论推导出侵彻深度、最大过载,结合试验结果推算静阻力系数,再将该系数应用于对相同介质的侵彻计算。运用该工程算法可以计算出单层介质、机场跑道最大侵彻深度、最大过载、经历时间以及弹体在多层介质中的运动规律。通过与不同计算方法的比较,表明该算法需要参数较少且结果更为可信。该算法计算结果与试验结果比较吻合,两者之间相对误差的平均值为12.8%。
Aimed at the penetration of kinetic energy bullets into airport runways, an engineering algorithm combining with experiments is proposed. Based on the cavity expansion theory, the algorithm deduces the penetration depth and the maximum overload, and deduces the coefficient of static resistance based on the test results. The coefficient is applied to the calculation of the penetration of the same medium. The engineering algorithm can be used to calculate the single-layer medium, the maximum penetration depth of the runway, the maximum overload, the experience time and the law of motion of the projectile in multi-layered media. The comparison with different calculation methods shows that the algorithm needs fewer parameters and the result is more credible. The calculated results are in good agreement with the experimental results, the average relative error between the two is 12.8%.