Method for obtaining damping coefficient of parachute flexible rope belt
A damping coefficient and acquisition method technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of complex calculation process, low reliability of calculation results, large errors, etc., to achieve accurate application range, Apply a wide range of effects
Pending Publication Date: 2021-02-23
BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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Problems solved by technology
In the simulation calculation, it is difficult to model and analyze the high-precision microstructure of the parachute belt, and the reliability of the calculation results is not high
At present, some scholars use the displacement test method. After the rope is tightened, the excitation is applied, and the damping coefficient is calculated according to the vibration displacement of the rope recorded by the camera. This method requires a high-speed and high-resolution camera, and it is necessary to manually identify the rope from the image. position, the calculation process is more complicated, and the error is larger
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[0026] In order to better understand the above technical solutions, the technical solutions of the present application will be described in detail below through the accompanying drawings and specific examples. It should be understood that the embodiments of the present application and the specific features in the examples are detailed descriptions of the technical solutions of the present application, and It is not a limitation to the technical solutions of the present application, and the embodiments of the present application and the technical features in the embodiments can be combined without conflict.
[0027] A method for obtaining the damping coefficient of a flexible rope of a parachute provided in the embodiment of the present application will be described in further detail below in conjunction with the accompanying drawings. The specific implementation methods may include (such as figure 1 and figure 2 shown):
[0028] Step 1, first pass the static tensile test of ...
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The invention discloses a method for obtaining a damping coefficient of a parachute flexible rope belt, and belongs to the technical field of aerospace pneumatic deceleration. The method comprises thefollowing steps: firstly, carrying out a static tensile test on a parachute rope belt to obtain the elongation at break and the rigidity under the length of the rope belt, then carrying out a fallingtest on the parachute rope belt, and selecting a proper balance weight and a proper lifting height according to the application condition and the elongation at break of the parachute rope belt; recording a load change curve of the parachute rope belt in the vibration process by the tension sensor, and obtaining an attenuation period according to the average attenuation value of the load curve; calculating the rigidity of the rope belt in the impact test according to the length of the parachute rope belt in the impact test and the length and rigidity of the static tensile test rope belt; and obtaining the damping coefficient of the rope belt by combining the load attenuation period and the rigidity of the rope belt.
Description
technical field [0001] The invention relates to a method for obtaining the damping coefficient of a parachute flexible rope, belonging to the technical field of aerospace aerodynamic deceleration. Background technique [0002] In aerospace, a parachute is an aerodynamic deceleration and stabilization device. The parachute is composed of canopy, radial belt, parachute, connecting belt, harness and so on. Packed in the umbrella bag before work, the aerodynamic resistance is generated through the straightening and inflation process, and the aerodynamic resistance is transmitted from the canopy to the radial belt, paracord, connecting belt and sling, and finally transmitted to the recovery cabin to realize the stable posture of the recovery cabin or deceleration function. When the parachute is just full, the aerodynamic resistance increases rapidly, and the parachute and the recovery capsule vibrate. During the vibration process, not only the attitude of the parachute and the ...
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IPC IPC(8): G06F30/17G06F30/20G06F119/14
CPCG06F30/17G06F30/20G06F2119/14Y02T90/00
Inventor 黄明星王文强李健蒋伟吴卓何青松王立武房冠辉张文博黄伟
Owner BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH