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Carrier-based helicopter ship surface resonance modeling method

A technology of ship surface resonance and modeling method, which is applied in special data processing applications, instruments, electrical digital data processing, etc. Effect

Active Publication Date: 2015-07-08
CHINA HELICOPTER RES & DEV INST
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Problems solved by technology

When the helicopter takes off and lands on the ship surface, the rotor damper, landing gear stiffness and damping may have serious nonlinear characteristics, and the dynamic characteristics of the rotor and the body system will change significantly in the ship vibration environment, resulting in the existence or possible The resonance instability of the ship surface due to the coupled motion of the rotor and the body appears, which is a dynamic problem that directly affects the safety of the ship

Method used

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  • Carrier-based helicopter ship surface resonance modeling method
  • Carrier-based helicopter ship surface resonance modeling method
  • Carrier-based helicopter ship surface resonance modeling method

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Embodiment Construction

[0033] The method for modeling the resonance of the shipboard helicopter involved in the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0034] The first step: the whole machine coordinate system, analyze the whole machine model. Assuming that the body is a rigid body, consider the six rigid body motion degrees of freedom of the body in space: yaw displacement X, lateral displacement Y, vertical displacement Z, roll Φ X , Pitch Φ Y , Yaw motion Φ Z , draw the whole machine model diagram, see figure 1 , define the origin of the body coordinate system at the center of gravity of the body; the X-axis is the heading, and the backward is positive; the Y-axis is lateral, and the right is positive; the Z-axis is vertical, and the upward is positive. The airframe model diagram defines the position parameters of the landing gear installed on the airframe, the position parameters from the center of the propeller hub to the ...

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Abstract

The invention relates to a carrier-based helicopter ship surface resonance modeling method, and belongs to the technical field of helicopter theoretical modeling. The method includes the steps that a single undercarriage load balance analysis model and a motion analysis model of a helicopter body on the ship surface are built; when a ship is guided to be brought down, modeling analysis is conducted on a bring-down device, the kinetic characteristic of the bring-down device is analyzed, and a sub system model is provided for overall ship surface resonance modeling analysis; according to the Newton's law of motion or the d'alembert's principle, a helicopter ship surface resonance analysis model for describing the ship surface motion and ship motion influences of a whole helicopter is built. According to the method, the built carrier-based helicopter ship surface resonance model can be applied to carrier-based helicopter ship surface resonance simulation analysis, and effective measures can be provided on the aspect of design to avoid and eliminate ship surface resonance.

Description

technical field [0001] The invention belongs to the theoretical modeling technology of helicopters, and relates to a ship surface resonance modeling method used for ship surface resonance simulation analysis of shipboard helicopters. Background technique [0002] In order to ensure that the shipboard helicopter can safely take off and land on the ship, and to ensure that no ship resonance occurs during takeoff and landing, it is necessary to calculate the stability of the ship's resonance, and the modeling of the ship's resonance is the basis. [0003] Ships in the marine meteorological environment will shake when they are moored or sailing in various sea conditions. When the helicopter takes off and lands on the ship surface, the rotor damper, landing gear stiffness and damping may have serious nonlinear characteristics, and the dynamic characteristics of the rotor and the body system will change significantly in the ship vibration environment, resulting in the existence or...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 朱艳凌爱民陈全龙
Owner CHINA HELICOPTER RES & DEV INST
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