| Helicopter Dynamic Component Comprehensive System (HDCCS) is a system which is composed of rotating components of helicopter including engine turbo, gearboxes, main rotor, tail rotor and accessories driven by transmission systems. It is important to calculate and analyze HDCCS's dynamic characteristic in the design of helicopter. This paper makes use of the Multi-body software to divide blade into 2 nodes and 15DOF beam, engine turbo/transmission/tail rotor into rigid disk and torsion bar spring, then establishes the dynamic model of HDCCS in ADAMS and analyzes its characteristic. Besides, this paper conducts the blade loads expression in the flying forward state and gets the dynamic response of the blade through dynamic simulation. The main tasks of this paper are as follows:1. The blade is divided into many lengths of beams which are composed of finite beam elements, those beams are connected by fixed-joint. Then this paper establishes the dynamic model of flexible multi-body of the rotor and analyzes its characteristic.2. The loads expression on the blade is acquired by combining the linear inflow with blade element theory in the middle speed forward state. Then the loads are added into the dynamic model in ADAMS by using force function to calculate the dynamic response.3. In order to simplify the modeling procedure, the engine/transmission/tail rotor system are treated as the shaft that only has torsion stiffness and plate that only has moment of inertia. To analyze the influence of blade lagging, flexible rotor model is coupled with transmission system to compute the characteristic of HDCCS system.4. This paper establishes the dynamic model of Lynx's HDCCS, validates the method of modeling and calculation by comparing with experimental data published overseas and finds out the influence of the moment of inertia of the transmission components and torsion stiffness of shafts to the lower mode characteristic of Lynx's HDCCS.
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