该方法是根据当地流活塞理论和片条理论导得的。
The analytical method is obtained by the local flow piston theory plus the strip theory.
基于改进的当地流活塞理论，推导了用模态坐标表示的弹性振动翼面的非定常广义气动力表达式。
Based on the improved local piston theory, this paper presents the matrix expression of generalized aerodynamic forces expressed by the generalized coordinates.
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