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Structural Analysis of a Rotorcraft Blade Design Using iVABS

Robert B. Haehnel, Yonghu Wenren, US Army Engineer Research and Development Center
Joon W. Lim, US Army CCDC AvMC
Su Tian, Wenbin Yu, Purdue University

https://doi.org/10.4050/F-0079-2023-18165

Abstract:
In this paper we introduce integrated VABS (iVABS) a tool to aid in the design of composite slender structures. iVABS can be used as an inverse tool to determine cross-section design given structural properties, such as torsional and bending stiffnesses, and inertial constraints (i.e., mass per unit length). In this work we explore using iVABS for designing the structural elements of a composite blade. We use a modified UH-60A blade; the updated outer mold line used in this study is a blade design presented by Allen et al. (ref. 1). In this effort we endeavor to develop a composite blade design that matches the torsional, chordwise and flap stiffnesses, blade mass per unit length, and shear center and center of gravity offsets properties of the UH-60A blade, while meeting strength constraints for the blade. In this initial effort we found that meeting the strength constraints and matching the target blade properties was challenging to do simultaneously with iVABS. Further work is needed to refine the optimization problem, chosen design variables, and cross-section templates to improve the final blade design. Regardless, this work demonstrates the power and flexibility of iVABS to quickly explore the design space. In the hands of an experienced design engineer iVABS could be a powerful tool to reduce design cycle times and develop innovative blade structural designs.


Structural Analysis of a Rotorcraft Blade Design Using iVABS

  • Presented at Forum 79
  • 12 pages
  • SKU # : F-0079-2023-18165
  • Structures and Materials

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Structural Analysis of a Rotorcraft Blade Design Using iVABS

Authors / Details:
Robert B. Haehnel, Yonghu Wenren, US Army Engineer Research and Development Center
Joon W. Lim, US Army CCDC AvMC
Su Tian, Wenbin Yu, Purdue University