Vibration of Periodic Structures in Aerospace Engineering – Online Short Course (Starts 12 May 2025) 12 May - 9 June 2025 Online

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  • From 12 May – 9 June 2025 (4.5 Weeks, 8 Classes, 24 Total Hours). No class on May 26.

  • Every Monday and Wednesday at 12:30–3:30 pm Eastern Time (all sessions will be recorded and available for replay; course notes will be available for download)

  • This new practical online course is applicable to the practice of vibration, flutter, and structural-acoustic analysis of stiffened structures, used in aerospace engineering and design.

  • All students will receive an AIAA Certificate of Completion at the end of the course.

OVERVIEW
Many structures in aerospace engineering are periodic, consisting of repetition of a basic periodic unit. Modelling such structures based on the conventional finite element method can be time consuming and expensive. However, the task can be accomplished in a cost-effective manner by taking the periodicity of the structure into account. The basic concepts will be explained by analyzing periodic spring-mass systems, periodically stiffened beams, plates and periodically stiffened models of an airplane fuselage section. Examples will include prediction of natural frequencies, structural response, sound transmission, and supersonic panel flutter.

WHO SHOULD ATTEND
Aerospace Engineers, Professors and graduate students involved in design and vibration analysis of stiffened structures subjected to dynamic excitations e.g., jet noise and boundary layer turbulence excitations, supersonic or hypersonic flow, structural dynamics, acoustics and aeroelasticity.

COURSE FEES (Sign-In To Register)
- AIAA Member Price: $995 USD
- Non-Member Price: $1195 USD
- AIAA Student Member Price: $495 USD

Classroom Hours / CEUs: 24 classroom hours / 2.4 CEU/PDH

Cancellation Policy: A refund less a $50.00 cancellation fee will be assessed for all cancellations made in writing prior to 5 days before the start of the event. After that time, no refunds will be provided.

Contact: Please contact Lisa Le or Customer Service if you have any questions about the course or group discounts.

Frequently Asked Questions

Outline

LEARNING OBJECTIVES / OUTLINE 

  • Learn about the fundamentals of the Periodic structure theory.
  • Learn how to predict the natural frequencies of periodically stiffened beams and plates.
  • Learn how to predict the response and sound transmission through a periodically stiffened structure exposed to a convected pressure field, e.g., an acoustic plane wave or a turbulent boundary layer pressure fluctuation.
  • Learn how to combine the Finite Element Method (FEM) with the Periodic Structure (PS) theory forprediction of the structural-acoustic natural frequencies and response ofan aircraft fuselage section in a cost-effective manner, compared to application of traditional FEM.
  • Learn about Intrinsic Structural Tuning to reduce the structural-acoustic response of a periodically stiffened structure.
  • Learn about the effects of deviations from periodicity.
  • Learn how to predict the flutter characteristics of a periodic structure exposed to a supersonic flow.
  • Learn about examples of other applications, e.g., vibration of circular rings on periodic support, wave propagation in a periodically supported pipe carrying fluid, vibration of heat exchanger tube banks of nuclear reactors, application to composite materials, dynamics of rotationally periodic structures, vibration control of periodic railroad tracks etc.
Materials
Recommended Textbook: Vibration of Periodic Structures, Author: Gautam SenGupta, scheduled to be Published by Elsevier in 2023. The book will be available to the attendees at a discount from the publisher.
Instructors
Dr. Gautam SenGupta received his BSc (Physics) from Presidency College, Calcutta, (India), BTech. (Mech. Eng.) from IIT, Kharagpur (India), and his PhD from the University of Southampton (UK), where he developed a unique method for predicting the natural frequencies of periodic structures. He worked as a Specialist Engineer in Acoustic Fatigue at the Royal Aeronautical Society of England, and at NASA-Langley as a Research Associate. He joined Boeing in 1973, where he applied the Periodic Structure Theory to predict and control the structural acoustic characteristics of an airplane fuselage in a cost-effective manner. He retired in 2016 as a Technical Fellow of the Boeing Company in Seattle, where he was also involved in developing methods for predicting airframe noise, and transonic flutter characteristics of airplanes. He is an Affiliate Professor at the University of Washington, where he teaches courses on Structural Dynamics and related subjects.

 

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