Launch Bar Dynamics Character Analysis of Carrier-Based Aircraft Catapult Launch
The launch bar is a unique device of carrier-based aircraft, which is connected to the nose gear and shuttle. In order to avoid the launch bar striking the flight deck after the launch bar pops out of the shuttle, it is very important to research the dynamics performance of the launch bar. This pape...
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doaj-c1fc85b75aa843d68854b81be541b6852020-11-25T01:02:44ZengMDPI AGApplied Sciences2076-34172019-07-01915307910.3390/app9153079app9153079Launch Bar Dynamics Character Analysis of Carrier-Based Aircraft Catapult LaunchQidan Zhu0Peng Lu1Zhibo Yang2Xun Ji3Yu Han4Lipeng Wang5College of Automation, Harbin Engineering University, Harbin 150001, ChinaCollege of Automation, Harbin Engineering University, Harbin 150001, ChinaCollege of Automation, Harbin Engineering University, Harbin 150001, ChinaSchool of Marine Electrical Engineering, Dalian Maritime University, Dalian 116026, ChinaCollege of Automation, Harbin Engineering University, Harbin 150001, ChinaCollege of Automation, Harbin Engineering University, Harbin 150001, ChinaThe launch bar is a unique device of carrier-based aircraft, which is connected to the nose gear and shuttle. In order to avoid the launch bar striking the flight deck after the launch bar pops out of the shuttle, it is very important to research the dynamics performance of the launch bar. This paper establishes a staged mathematical model of catapult launch including the launch bar, a steam-powered catapult, a holdback bar, and a carrier-based aircraft. This article studied the effect of the mass of the launch bar, restoring moment of the launch bar, and center of gravity position of the launch bar on the dynamics performance of the launch bar. The results showed the following: (1) we could reduce the risk collision of the launch bar and deck by reducing the mass of the launch bar, increasing the restoring moment, and shifting the center of gravity position of the launch bar; (2) under the working condition of this article, we changed the center of gravity position of the launch bar to control the sink of the launch bar end, having the most obvious effect, and we reduced the mass of the launch bar, having the least effect on controlling the sink of the launch bar end; however, reducing the mass of the launch bar could also greatly reduce the risk collision of the launch bar and deck; (3) in order to avoid the launch bar striking the flight deck, the restoring moment of the launch bar must overcome the sum of other moments. The study results can give a theoretical reference for designing and testing the launch bars of carrier-based aircraft. It can also give a theoretical reference for designing and testing the launch bar’s driving mechanisms.https://www.mdpi.com/2076-3417/9/15/3079catapult launchlaunch barholdback barsteam catapultcarrier-based aircraft |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Qidan Zhu Peng Lu Zhibo Yang Xun Ji Yu Han Lipeng Wang |
spellingShingle |
Qidan Zhu Peng Lu Zhibo Yang Xun Ji Yu Han Lipeng Wang Launch Bar Dynamics Character Analysis of Carrier-Based Aircraft Catapult Launch Applied Sciences catapult launch launch bar holdback bar steam catapult carrier-based aircraft |
author_facet |
Qidan Zhu Peng Lu Zhibo Yang Xun Ji Yu Han Lipeng Wang |
author_sort |
Qidan Zhu |
title |
Launch Bar Dynamics Character Analysis of Carrier-Based Aircraft Catapult Launch |
title_short |
Launch Bar Dynamics Character Analysis of Carrier-Based Aircraft Catapult Launch |
title_full |
Launch Bar Dynamics Character Analysis of Carrier-Based Aircraft Catapult Launch |
title_fullStr |
Launch Bar Dynamics Character Analysis of Carrier-Based Aircraft Catapult Launch |
title_full_unstemmed |
Launch Bar Dynamics Character Analysis of Carrier-Based Aircraft Catapult Launch |
title_sort |
launch bar dynamics character analysis of carrier-based aircraft catapult launch |
publisher |
MDPI AG |
series |
Applied Sciences |
issn |
2076-3417 |
publishDate |
2019-07-01 |
description |
The launch bar is a unique device of carrier-based aircraft, which is connected to the nose gear and shuttle. In order to avoid the launch bar striking the flight deck after the launch bar pops out of the shuttle, it is very important to research the dynamics performance of the launch bar. This paper establishes a staged mathematical model of catapult launch including the launch bar, a steam-powered catapult, a holdback bar, and a carrier-based aircraft. This article studied the effect of the mass of the launch bar, restoring moment of the launch bar, and center of gravity position of the launch bar on the dynamics performance of the launch bar. The results showed the following: (1) we could reduce the risk collision of the launch bar and deck by reducing the mass of the launch bar, increasing the restoring moment, and shifting the center of gravity position of the launch bar; (2) under the working condition of this article, we changed the center of gravity position of the launch bar to control the sink of the launch bar end, having the most obvious effect, and we reduced the mass of the launch bar, having the least effect on controlling the sink of the launch bar end; however, reducing the mass of the launch bar could also greatly reduce the risk collision of the launch bar and deck; (3) in order to avoid the launch bar striking the flight deck, the restoring moment of the launch bar must overcome the sum of other moments. The study results can give a theoretical reference for designing and testing the launch bars of carrier-based aircraft. It can also give a theoretical reference for designing and testing the launch bar’s driving mechanisms. |
topic |
catapult launch launch bar holdback bar steam catapult carrier-based aircraft |
url |
https://www.mdpi.com/2076-3417/9/15/3079 |
work_keys_str_mv |
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