Independent variable parameter device for bending stiffness and rotational stiffness of full-motion rudder surface flutter model
A bending stiffness and rotational stiffness technology, applied in the field of independent variable parameter devices, can solve the problems of reduced reliability of test results, non-independent variable parameters of flutter wind tunnel test, etc., to improve reliability, reliable assembly and connection, Easy to replace effects
Active Publication Date: 2020-11-24
JIANGXI HONGDU AVIATION IND GRP
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] The full-motion rudder flutter model designed by the traditional wind tunnel test can usually only simulate the rotational stiffness of the full-motion rudder, and changes the bending stiffness while changing the rotational stiffness, and the stiffness coupling will lead to flutter wind tunnel The variable parameters of the test are not independent, which reduces the reliability of the test results
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0018] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.
[0019] see Figure 1 ~ Figure 2 The full-motion rudder surface flutter model is an independent variable parameter device for bending stiffness and rotation stiffness, including rotation spring piece 1, bending spring piece 2, decoupling pin 3, rotation shaft 4, first bearing 5, second bearing 6, rocker Arm 7, bearing support 8, leaf spring support 9 and sleeve 10; wherein, bearing support 8 and spring leaf support 9 are installed on the adapter plate used for wind tunnel test, and one end of rotating shaft 4 passes through the first bearing 5 is installed on the bearing support 8, the other end of the rotating shaft 4 is set with a second bearing 6, and the second bearing 6 is nested in the bearing installation hole provided at one end of the cu...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to an independent variable-parameter device for the bending rigidity and the rotating rigidity of a full-motion control surface flutter model, which is characterized in that oneend of a rotating shaft is provided with a rotating rigidity adjustment mechanism, and the other end of the rotating shaft is provided with a bending rigidity adjustment mechanism; in the rotating rigidity adjustment mechanism, one end of a rotating spring piece is installed at the other end of a spring piece support, one end of a decoupling pin is fixed at the other end of the rotating spring piece, the other end of the decoupling pin is installed on a rocker arm, the rocker arm is installed on the rotating shaft, and the rotating shaft located at one end of the rocker arm is installed on a bearing support; in the bending rigidity adjustment mechanism, a second bearing is arranged at the other end of the rotating shaft, the second bearing is nested at one end of a bending spring piece atthe same time, and the other end of the bending spring piece is installed at one end of the spring piece support; and the bending rigidity and the rotating rigidity of the full-motion control surfaceare adjusted through the bending spring piece and the rotating spring piece, and the decoupling of the bending rigidity and the rotating rigidity of the full-motion control surface is realized by thedecoupling pin, thereby improving the reliability of a control surface variable-parameter flutter wind tunnel test, and having important engineering practical values.
Description
technical field [0001] The invention relates to the technical field of aircraft wind tunnel tests, in particular to an independent variable parameter device for the bending stiffness and rotational stiffness of a full-motion rudder surface flutter model. Background technique [0002] According to the classical flutter theory, the flutter of an aircraft is a self-excited oscillation caused by the close frequency of different order modes of the structure under the action of aerodynamic force. For the full-motion rudder surface of an aircraft, the two-order coupled modes that cause flutter are usually the bending mode and the rotational mode of the rudder surface, which correspond to the bending stiffness and rotational stiffness of the rudder surface respectively. The wind tunnel test is to study the two-order In order to determine the effects of different modes on the flutter characteristics of the full-motion rudder surface, it is necessary to conduct variable parameter flut...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01M9/08G01M9/02
CPCG01M9/02G01M9/08
Inventor 吴成林陈立勇罗士超亓洪玲王钱伟孙超岳鹏阳魏榕祥项小平彭志军朱亲强李朝光
Owner JIANGXI HONGDU AVIATION IND GRP