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http://dx.doi.org/10.5139/JKSAS.2022.50.10.701

The Estimation of Buckling Load of Pressurized Unstiffened Cylindrical Shell Using the Hybrid Vibration Correlation Technique Based on the Experimental and Numerical Approach  

Lee, Mi-Yeon (Chungnam National University)
Jeon, Min-Hyeok (Chungnam National University)
Cho, Hyun-Jun (Chungnam National University)
Kim, Yeon-Ju (Chungnam National University)
Kim, In-Gul (Chungnam National University)
Park, Jae-Sang (Chungnam National University)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.50, no.10, 2022 , pp. 701-708 More about this Journal
Abstract
Since the propellant tank structure of the projectile is mainly subjected to a compressive force, there is a high risk of damage due to buckling. Large and lightweight structures such as propellant tank have a complex manufacturing process. So it requires a non-destructive test method to predict buckling load to use the structure after testing. Many studies have been conducted on Vibration Correlation Technique(VCT), which predicts buckling load using the relationship between compressive load and natural frequency, but it requires a large compressive load to predict the buckling load accurately, and it tends to decrease prediction accuracy with increasing internal pressure in structure. In this paper, we analyzed the causes of the decrease in prediction accuracy when internal pressure increases and proposed a method increasing prediction accuracy under the low compressive load for being usable after testing, through VCT combined testing and FEA result. The prediction value by the proposed method was very consistent with the measured actual buckling load.
Keywords
Vibration Correlation Technique; Pressurized Unstiffened Cylindrical Shell; Buckling Load; Finite Element Analysis; Compressive Load-Natural Frequency;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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