airframe

The inherency frequency and vibratory-type are calculated based on the modal analysis of the whole airframe.

对身整体框架进行模态分析,求固有频率和振型。

If additional trainer aircraft are needed, the Pentagon plans to redesignate some of its existing rotorcraft rather than buying new airframes.

如果需要额外的训练，五角大楼计划再次指派一些现有的旋翼飞购买新的。

Included in the transaction are three nonflying TP-3A aircraft to used as airframe spares and extra T-56 engines to support the 12 flyable aircraft.

这次交易包括三架能飞的TP-3A飞进行身备用，以及额外的T-56发动以支持12架可驶飞。