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。
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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