A Structural Design Method for Slotted Parachute
A technology of structural design and parachute, applied in parachutes, emergency equipment, aircraft parts, etc., can solve the problems of low drag coefficient, poor anti-flutter performance, uneven stress distribution of canopy, etc., and achieve high drag coefficient and uniform force , the effect of weakening flutter effect
Active Publication Date: 2017-01-18
BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH +1
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Problems solved by technology
[0005] The purpose of the present invention is to solve the problems of uneven stress distribution, low drag coefficient and poor anti-flutter performance of the canopy in the prior art. A certain structure air volume, so as to realize the supersonic low-density umbrella with high resistance coefficient, strong stability and anti-flutter
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[0050] The spherical slotted parachute and its structural design method according to the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0051] The spherical slotted parachute according to the present invention comprises two parts of canopy and parachute, and its structure is as follows: figure 1 shown.
[0052] The canopy 1 is divided into upper, middle and lower parts: the upper part is a disc 11, and the lower part is a belt 13, all of which are dense fabrics. separated.
[0053] Disc 11 is a spherical dense fabric, and its top has a top hole, and band 13 is a spherical truncated cone, which is on a spherical surface with the disc, and its lower end is connected with the parachute.
[0054] The canopy is a spherical surface with a central angle of 210° on the whole, which extends downwards by 15° from the bottom edge of the hemispherical surface. In the fully expanded state, the shape o...
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The invention provides a spherical slotted parachute applied to a supersonic low-density parachute opening environment and a structure design method of the spherical slotted parachute. A parachute canopy is shaped like a dense fabric parachute, and is structurally shaped like a 210-degree sphere, the bottom edge of the hemisphere extends by 15 degrees, and the parachute canopy tends to be hemispherical in a complete opening state. In order to improve the stability, a wide slot is formed in the maximum diameter of the parachute canopy to achieve certain structural air permeability. The spherical slotted parachute has the advantages of high resistance coefficient, high stability, uniform parachute canopy stress distribution, low parachute opening dynamic load and high flutter resistance, and is an excellent supersonic low-density parachute, and the defects in the prior art are overcome.
Description
technical field [0001] The invention belongs to the technical field of aerospace entry, deceleration and landing (EDL), and in particular relates to a spherical slit parachute applied to a supersonic low-density parachute opening environment and a structural design method thereof. Background technique [0002] With the rapid development of deep space exploration technology, the EDL technology for planets with thin atmospheres (such as Mars) has become a research hotspot and difficulty. Among them, supersonic low-density parachute deceleration technology is a core technology. Up to now, the parachute parachute types suitable for supersonic low-density parachute opening include disc seam parachute, improved ring sail parachute, cross parachute and so on. Although the cross-shaped parachute has the largest unit resistance area, with the increase of parachute opening speed, the cross-shaped parachute will have greater vibration and poor stability; under the condition of superson...
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IPC IPC(8): B64D17/02
Inventor 梁艳李健
Owner BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH