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首页> 外文期刊>Journal of the American Helicopter Society >Multibody Modeling of Engage and Disengage Operations of Helicopter Rotors
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Multibody Modeling of Engage and Disengage Operations of Helicopter Rotors

机译：直升机旋翼啮合和脱离操作的多体建模

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This paper deals with the modeling of the engage and disengage operations of a helicopter rotor during which blades can come in intermittent contact with the droop or flap stops. The problem is formulated within the framework of finite element based flexible multibody dynamics that allows the analysis of rotorcraft systems of arbitrary topology with the potential of contact among various components of the system. Contact is assumed to be of finite duration, and the forces acting between the contacting stops are explicitly computed during the simulation. The modeling of contact consists of three parts: the evaluation of the relative distance between the stops, a unilateral contact condition which is transformed into a holonomic constraint by the addition of a slack variable, and a contact model which describes the relationship between the contact force and the local deformation of the contacting bodies. The proposed analysis procedure is validated by comparison with experimental data, and the aeroelastic analysis of shipboard engage and disengage operations of a H-46 rotor is presented.
机译：本文涉及直升机旋翼的啮合和脱离操作的建模，在此过程中，叶片可能会与下垂或襟翼止动件间歇接触。该问题是在基于有限元的灵活多体动力学框架内提出的，该框架允许对具有任意拓扑结构的旋翼飞机系统进行分析，并具有系统各组成部分之间的接触潜力。假设接触持续时间有限，并且在模拟过程中显式计算了接触止点之间的作用力。接触的建模包括三个部分：止挡之间的相对距离的评估，通过添加松弛变量而转换为完整约束的单边接触条件以及描述接触力之间关系的接触模型。以及接触体的局部变形。通过与实验数据进行比较，验证了所提出的分析程序，并给出了H-46旋翼的舰载啮合和脱离操作的气动弹性分析。

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