It is found that the first vibration mode is vertical by the dynamic analysis and the structural response are in the al...
通过动力分析可以发现，结构的第一振型为竖向振动，动力分析结果也满足抗震要求，说明结构形式是合理可行的。
Calculation example given indicates that the equations of dynamic response proposed for vertical movement and direction rotation reflect flight characteristics of this helicopter.
某型共轴双旋翼直升机计算实例表明，所得结果与该型直升机飞行特性一致。
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