摘要
提出了一种全新的计算旋翼桨叶动力响应的方法。以柔性多体系统动力学为基础,结合有限单元法和拉格朗日方程,推导出绕动轴转动的多柔体动力学质量矩阵,建立了直升机旋翼桨叶的动力学控制方程及其系数矩阵的解析表达式,采用Rung-Kutta法进行数值积分,分析了挥舞运动在强耦合状态下的运动规律。仿真结果表明采用此方法建立旋翼桨叶的动力学控制方程,可以更真实的反映桨叶的实际运动状态。
A new way to solve dynamical response of rotor blade in helicopter. Based on dynamics of flexible multibody systems, com- binin$ finite element method and Lagrange equation, deduced the mass matrix that rotating moving axis, established and solved the dynamic control equation of flexible rotor blade. The result can distinctly show the flexibility of rotor blade. Above all, the flapping motion of rotor blade is more complicated as all the motions are coupled together. Numerical calculation and theoretical analyses indicate that this model and dynamical control equation are correct and reasonable.
出处
《微计算机信息》
北大核心
2007年第28期203-204,260,共3页
Control & Automation
基金
国家自然科学基金资助项目(59675040)
关键词
直升机
旋翼桨叶
耦合振动
挥舞运动
helicopter
rotor blade
coupled vibration
flapping motion
