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Method for acquiring kinetic parameter of helicopter hub center

A dynamic parameter, helicopter technology, applied in the field of helicopters

Inactive Publication Date: 2017-04-26
CHINA HELICOPTER RES & DEV INST
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  • Abstract
  • Description
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Problems solved by technology

There is no method for calculating the dynamic parameters of the helicopter hub center (the dynamic parameters of the helicopter hub center include the effective mass Mf of the hub center, the effective stiffness Kf, and the effective damping Cf)

Method used

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  • Method for acquiring kinetic parameter of helicopter hub center

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Embodiment Construction

[0026] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below ...

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Abstract

The invention discloses a method for acquiring a kinetic parameter of a helicopter hub center. The method for acquiring the kinetic parameter of the helicopter hub center comprises the following steps: step 1, establishing a helicopter finite element model including a helicopter rotor and an airframe; step 2, setting a calculation frequency bandwidth, performing modal analysis on the helicopter finite element model, and acquiring frequency response data of the overall mode; step 3, performing kinetic characteristic response simulation calculation on the hub center to obtain frequency response data of the hub center, and drawing an amplitude-frequency response curve and a phase-frequency response curve based on the frequency response data of the hub center and the frequency response data of the overall mode; and step 4, acquiring the kinetic parameter of the helicopter hub center. The method for acquiring the kinetic parameter of the helicopter hub center can provide a parameter for preliminary design phase analysis of helicopter ground resonance.

Description

technical field [0001] The invention relates to the technical field of helicopters, in particular to a method for distributing the mass of a helicopter body. Background technique [0002] The helicopter ground joint test bed mainly conducts comprehensive work coordination inspection, functional test, durability test and scientific research test in the development stage of the system and the three major moving parts. The helicopter ground joint test bed has complex dynamic problems, among which ground resonance is One of the most dangerous situations is essentially the helicopter rotor / body (body) dynamics matching problem. [0003] When solving the ground resonance problem of the helicopter rotor / body (platform), the dynamic parameters of the helicopter rotor / body (platform) are mainly identified and obtained through dynamic tests at this stage. There is no method for obtaining the dynamic parameters of the hub center of the helicopter through calculation methods (the dynam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50B64F5/60
CPCG06F30/15G06F30/23
Inventor 付双检王文涛陈浩许宁李明强邵林峰凌爱民李五洲
Owner CHINA HELICOPTER RES & DEV INST
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