Aeroelastic divergence and free vibration of tapered composite wings

Mengchun Yu, Chyanbin Hwu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

In aeroelasticity, divergence of wing structures is an important static phenomenon. On the other hand, the free vibration analysis is significant to investigate the dynamic characteristics of the structure. Recently, a comprehensive wing model considering the airfoil shape was established. However, the analysis of tapered wing was still not taken into account so far. In this paper, this model is extended to discuss the tapered composite wings. By employing the Hamilton's principle and following the standard procedure of finite element formulation, an elementwise comprehensive model was developed. Because this model can be applied to both static and dynamic analyses, divergence and free vibration will be studied. In this model, aerodynamic force vector containing the lift and moment of the wings was approximated by the strip theory, which will then lead to a standard eigen-relation for solving the divergence dynamic pressure by neglecting the inertial terms. Besides, this model will also provide another eigen-relation for solving the natural frequencies when all the external forces are eliminated.

Original languageEnglish
Title of host publicationProceedings of the 16th International Conference on Composite Materials, ICCM-16 - "A Giant Step Towards Environmental Awareness
Subtitle of host publicationFrom Green Composites to Aerospace"
Publication statusPublished - 2007 Dec 1
Event16th International Conference on Composite Materials, ICCM-16 - "A Giant Step Towards Environmental Awareness: From Green Composites to Aerospace" - Kyoto, Japan
Duration: 2007 Jul 82007 Jul 13

Publication series

NameICCM International Conferences on Composite Materials

Other

Other16th International Conference on Composite Materials, ICCM-16 - "A Giant Step Towards Environmental Awareness: From Green Composites to Aerospace"
CountryJapan
CityKyoto
Period07-07-0807-07-13

Fingerprint

Composite materials
Aeroelasticity
Vibration analysis
Airfoils
Natural frequencies
Aerodynamics

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Ceramics and Composites

Cite this

Yu, M., & Hwu, C. (2007). Aeroelastic divergence and free vibration of tapered composite wings. In Proceedings of the 16th International Conference on Composite Materials, ICCM-16 - "A Giant Step Towards Environmental Awareness: From Green Composites to Aerospace" (ICCM International Conferences on Composite Materials).
Yu, Mengchun ; Hwu, Chyanbin. / Aeroelastic divergence and free vibration of tapered composite wings. Proceedings of the 16th International Conference on Composite Materials, ICCM-16 - "A Giant Step Towards Environmental Awareness: From Green Composites to Aerospace". 2007. (ICCM International Conferences on Composite Materials).
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abstract = "In aeroelasticity, divergence of wing structures is an important static phenomenon. On the other hand, the free vibration analysis is significant to investigate the dynamic characteristics of the structure. Recently, a comprehensive wing model considering the airfoil shape was established. However, the analysis of tapered wing was still not taken into account so far. In this paper, this model is extended to discuss the tapered composite wings. By employing the Hamilton's principle and following the standard procedure of finite element formulation, an elementwise comprehensive model was developed. Because this model can be applied to both static and dynamic analyses, divergence and free vibration will be studied. In this model, aerodynamic force vector containing the lift and moment of the wings was approximated by the strip theory, which will then lead to a standard eigen-relation for solving the divergence dynamic pressure by neglecting the inertial terms. Besides, this model will also provide another eigen-relation for solving the natural frequencies when all the external forces are eliminated.",
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Yu, M & Hwu, C 2007, Aeroelastic divergence and free vibration of tapered composite wings. in Proceedings of the 16th International Conference on Composite Materials, ICCM-16 - "A Giant Step Towards Environmental Awareness: From Green Composites to Aerospace". ICCM International Conferences on Composite Materials, 16th International Conference on Composite Materials, ICCM-16 - "A Giant Step Towards Environmental Awareness: From Green Composites to Aerospace", Kyoto, Japan, 07-07-08.

Aeroelastic divergence and free vibration of tapered composite wings. / Yu, Mengchun; Hwu, Chyanbin.

Proceedings of the 16th International Conference on Composite Materials, ICCM-16 - "A Giant Step Towards Environmental Awareness: From Green Composites to Aerospace". 2007. (ICCM International Conferences on Composite Materials).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - In aeroelasticity, divergence of wing structures is an important static phenomenon. On the other hand, the free vibration analysis is significant to investigate the dynamic characteristics of the structure. Recently, a comprehensive wing model considering the airfoil shape was established. However, the analysis of tapered wing was still not taken into account so far. In this paper, this model is extended to discuss the tapered composite wings. By employing the Hamilton's principle and following the standard procedure of finite element formulation, an elementwise comprehensive model was developed. Because this model can be applied to both static and dynamic analyses, divergence and free vibration will be studied. In this model, aerodynamic force vector containing the lift and moment of the wings was approximated by the strip theory, which will then lead to a standard eigen-relation for solving the divergence dynamic pressure by neglecting the inertial terms. Besides, this model will also provide another eigen-relation for solving the natural frequencies when all the external forces are eliminated.

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Yu M, Hwu C. Aeroelastic divergence and free vibration of tapered composite wings. In Proceedings of the 16th International Conference on Composite Materials, ICCM-16 - "A Giant Step Towards Environmental Awareness: From Green Composites to Aerospace". 2007. (ICCM International Conferences on Composite Materials).