<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The article presents an experimental method of determining the geometric properties of jet engine rotor airfoils based on modal vibration testing. The procedure is based on adjusting the results of analytical calculations to the laboratory outcomes. Experimental tests were carried out on a set of 20 jet engine fan blades made of AL7022-t6 aluminium alloy. Each blade differed in weight and geometric dimensions within the accepted design tolerance. Numerical analysis of five airfoils that differed in thickness was performed. Modal vibration test results were summarised and compared with the results obtained by the numerical method. The comparison revealed a high similarity of the frequency and form of vibrations acquired by numerical simulation for each of the blades in relation to the executed vibration testing. Based on the verification of the theoretical model with the results obtained through experimental testing, conclusions were drawn about the object’s dynamic behaviour and its technological quality and geometric properties, whereby each of airfoil was probably thinned.</p>
</abstract>

The article presents an experimental method of determining the geometric properties of jet engine rotor airfoils based on modal vibration testing. The procedure is based on adjusting the results of analytical calculations to the laboratory outcomes. Experimental tests were carried out on a set of 20 jet engine fan blades made of AL7022-t6 aluminium alloy. Each blade differed in weight and geometric dimensions within the accepted design tolerance. Numerical analysis of five airfoils that differed in thickness was performed. Modal vibration test results were summarised and compared with the results obtained by the numerical method. The comparison revealed a high similarity of the frequency and form of vibrations acquired by numerical simulation for each of the blades in relation to the executed vibration testing. Based on the verification of the theoretical model with the results obtained through experimental testing, conclusions were drawn about the object’s dynamic behaviour and its technological quality and geometric properties, whereby each of airfoil was probably thinned.

Determination of the Geometric Properties of a Jet Engine Fan Blades Based on Modal Vibration Testing

Transactions on Aerospace Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

The article presents an experimental method of determining the geometric properties of jet engine rotor airfoils based on modal vibration testing. The...

Determination of the Geometric Properties of a Jet Engine Fan Blades Based on Modal Vibration Testing

Published Online: Sep 27, 2022

Page range: 56 - 74

Received: Jan 26, 2022

Accepted: Jun 20, 2022

DOI: https://doi.org/10.2478/tar-2022-0017

Keywords
blade vibration, modal analysis, finite elements, design, aviation

© 2022 Maciej Osiewicz et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Determination of the Geometric Properties of a Jet Engine Fan Blades Based on Modal Vibration Testing

Published Online: Sep 27, 2022

Page range: 56 - 74

Received: Jan 26, 2022

Accepted: Jun 20, 2022

DOI: https://doi.org/10.2478/tar-2022-0017

Keywordsblade vibration, modal analysis, finite elements, design, aviation

© 2022 Maciej Osiewicz et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
blade vibration, modal analysis, finite elements, design, aviation