BCN薄膜的划痕深度与薄膜的结构密切相关，而摩擦系数受薄膜结构的影响不明显；
The scratch depth of BCN films were mainly depended on the component of bonding structures in the films, but the effect of bonding structures on the friction coefficient was not obvious.
计算表明，滑动摩擦系数选取对钻地弹侵彻深度有较大影响，进而分析了弹体改变对滑动摩擦系数的影响。
Through the calculation, the choice of coefficient has rather great influence on the depth of projectile penetration. Then the influence of the change of projectiles on the coefficient is analyzed.
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