Study on the Method of Prediction of Complete Inflation Time of Parachute

Year : 2025 | Volume : 15 | Issue : 01 | Page : 25 31
    By

    Wi Song Jon,

  • Sol Song Pak,

  • Won Hak Kim,

  • Jong Dok Ri1,

  • Jong Hwang,

  1. Faculty, Department of Dynamics, Kim Il Sung University, Taesong District, Pyongyang, DPR, Korea
  2. Faculty, Department of Dynamics, Kim Il Sung University, Taesong District, Pyongyang, DPR, Korea
  3. Faculty, Department of Dynamics, Kim Il Sung University, Taesong District, Pyongyang, DPR, Korea
  4. Faculty, Department of Dynamics, Kim Il Sung University, Taesong District, Pyongyang, DPR, Korea
  5. Faculty, Department of Dynamics, Kim Il Sung University, Taesong District, Pyongyang, DPR, Korea

Abstract

In general, the parachute test is a long test period, expensive, and difficult to measure with accuracy, which makes it a very laborious and laborious task due to the strong nonlinearity of the fabric of the parachute. Therefore, attempts have been made to overcome this by using a parachute testbed or by simulation, but in our country, there is no numerical simulation of the parachute, and no research has been done on it. According to the development of military techniques, it is very important to determine the complete inflation time of the parachute. So far, there is no method to predict the total expansion time of a parachute, which depends on empirical formulas and various data. In this paper, we discussed how to determine this. Finally, a model of the parachute was developed using the fluid-structure interaction technique (FSI) in the LS-DYNA program, which is a transient dynamic finite element code. In general, it has been considered difficult to predict the total inflation time of a parachute, and measurements have been made by approximate calculations and experimental methods. Predicting the correct divergence time is of great importance in determining the standard drop height and the rate of the drop. To this end, we have investigated how to calculate the air-filling time of a parachute. A mathematical model for calculating air-filling time is developed and verified by a numerical example, combining the mass conservation equation and the equations of motion of the parachute system for a circular parachute.

Keywords: Air-filling time, circular parachute, instantaneous speed of the parachute system, ALE method, inflation time

[This article belongs to Trends in Mechanical Engineering & Technology ]

How to cite this article:
Wi Song Jon, Sol Song Pak, Won Hak Kim, Jong Dok Ri1, Jong Hwang. Study on the Method of Prediction of Complete Inflation Time of Parachute. Trends in Mechanical Engineering & Technology. 2025; 15(01):25-31.
How to cite this URL:
Wi Song Jon, Sol Song Pak, Won Hak Kim, Jong Dok Ri1, Jong Hwang. Study on the Method of Prediction of Complete Inflation Time of Parachute. Trends in Mechanical Engineering & Technology. 2025; 15(01):25-31. Available from: https://journals.stmjournals.com/tmet/article=2025/view=212234


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Regular Issue Subscription Review Article
Volume 15
Issue 01
Received 31/01/2025
Accepted 17/04/2025
Published 26/04/2025
Publication Time 85 Days
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