Sensitivity Analysis of Holdback Bar Release Load during Catapult-Assisted Takeoff of Carrier-Based Aircraft
Abstract
:1. Introduction
2. Aircraft Mechanical Models of Holdback Bar Tension and Release Stages
2.1. Aircraft Mechanical Model in Holdback Bar Tensioning State
2.2. Aircraft Gliding Dynamics Model after Holdback Bar Release
2.3. Effect of Holdback Bar Release Load on Catapult-Assisted Takeoff Velocity
3. Holdback Bar Device Connection Relationship and Contact Mechanics Model
3.1. Connection Relationship of Holdback Bar Device
3.2. Contact Mechanics Model
4. Simulation Analysis of Holdback Bar Release Process
4.1. Holdback Bar Simulation Analysis Model
4.1.1. Front Joint Contact Model
4.1.2. Lock Mechanism Contact Model
4.1.3. Release Mechanism Contact Model
4.2. Simulation of Holdback Bar Release Process
5. Result and Discussion
5.1. Influence of the Structural Parameters on the Release Load
5.2. Effect of Contact Surface Friction Coefficient on Released Load
6. Conclusions
- 1.
- The release load of the holdback bar is crucial to the catapult-assisted takeoff speed of the carrier-based aircraft, and the accurate control of the release load is the key to ensure the catapult-assisted takeoff performance.
- 2.
- In determining the structural parameters of the contact surface of the holdback bar release mechanism, consideration should be given to the effect of changes in the angle of the contact surface on the sensitivity of the release load; when the angle of the contact surface is between and the effect on the sensitivity of the release load is small, in order to ensure the stability of the release load, the angle of the contact surface of the holdback bar should be selected within this range.
- 3.
- The release load increases with the increase of friction coefficient of each contact surface of the holdback lock mechanism. When the friction coefficient is greater than the critical value of 0.3, the release load increases rapidly; in order to make the release load more stable, the friction coefficient should be selected in the range of 0.1 to 0.3, when the impact on the sensitivity of the release load is small.
- 4.
- As for repeatable holdback bar, in order to ensure the stability of the release load when repeated, and to accurately control the magnitude of the release load, the factors affecting the sensitivity of the release load should be thoroughly considered in design and applications.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Conflicts of Interest
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No. | Friction Coefficient | Release Load (t) |
---|---|---|
1 | 0.1 | 17.1 |
2 | 0.2 | 18 |
3 | 0.3 | 18.8 |
4 | 0.4 | 34.6 |
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Zhu, E.; Zhang, Z.; Nie, H. Sensitivity Analysis of Holdback Bar Release Load during Catapult-Assisted Takeoff of Carrier-Based Aircraft. Appl. Sci. 2022, 12, 785. https://doi.org/10.3390/app12020785
Zhu E, Zhang Z, Nie H. Sensitivity Analysis of Holdback Bar Release Load during Catapult-Assisted Takeoff of Carrier-Based Aircraft. Applied Sciences. 2022; 12(2):785. https://doi.org/10.3390/app12020785
Chicago/Turabian StyleZhu, Enze, Zhipeng Zhang, and Hong Nie. 2022. "Sensitivity Analysis of Holdback Bar Release Load during Catapult-Assisted Takeoff of Carrier-Based Aircraft" Applied Sciences 12, no. 2: 785. https://doi.org/10.3390/app12020785
APA StyleZhu, E., Zhang, Z., & Nie, H. (2022). Sensitivity Analysis of Holdback Bar Release Load during Catapult-Assisted Takeoff of Carrier-Based Aircraft. Applied Sciences, 12(2), 785. https://doi.org/10.3390/app12020785