The inherency frequency and vibratory-type are calculated based on the modal analysis of the whole airframe.
对
整体框架进行模态分析,求解固有频率和振型。
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Although four-engine operation would be more efficient, upgrading the airframe to run with only four engines would necessitate further alterations to the aircraft's systems and control surfaces especially the rudder, extending the project's duration, cost, and complexity.
虽然四发动机运行会更高效,但将机体升级为仅使用四台发动机需要进一步修改飞机的系统和控制面,特别
方向舵,这将延长项目的周期、成本和复杂性。