...费机械工程论文 关键词：弹体结构；外壳体；混凝土；侵彻深度 [gap=927]keywords：projectile body configuration; outer shell; concrete; penetration depth ...
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螺杆钻具外壳体是螺杆钻具的关键零部件，也是易失效件之一。
The shell of positive-displacement motors is the key component of down-hole motors, it is also a main vulnerable parts.
一种流体、气体的活化器，其是由二个外壳体及二个陶瓷黑体组合而成；
The utility model relates to a fluid and gas activating device, composed of two housing bodies and two ceramic black bodies which are combined with each other.
利用有限元法计算内外壳体的应力，按照串联模式进行旋转密封总成整体可靠度计算。
Finally, after computing the maximum stresses of the inner housing and outer housing with FEM, the total reliability of rotary sealing assembly is calculated according to serial pattern.
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