某四旋翼飞行器机架的模态分析

为了避免某四旋翼飞行器在执行任务过程中产生共振,对真实机架结构进行了建模,用有限元软件Workbench进行模态分析.通过提取机架的7～12阶固有模态,发现旋翼机的激振频率可有效避开其固有频率.结果表明,该方法可有效避免共振,增加飞行器任务执行的作业量及有效率,为该飞行器的设计、改进及其研究提出参考意见.

Modal Analysis of Four Rotor Aircraft Frame

In order to avoid certain four rotor aircraft producing resonance in the process of performing tasks,we built modeling with its real frame structure,using finite element software Workbench to carry out the modal analysis.By extracting the chassis of the 7 to 12 natural modal,vibration frequency of the rotor machine can effectively avoid the natural frequency which can be found.Results show that the method can effectively avoid the resonance,and increase craft task to perform the work and efficient,and put forward reference opinions for the design and improvement of the aircraft and its research.