Launch Vehicle Coupled Loads Analysis
DURATION: THREE DAYS
COURSE NO.: 5050
COURSE SUMMARY
This technical class introduces the scope and theory of Coupled Loads Analysis (CLA) for Launch Vehicles. The course begins with a breakdown of the physics from liftoff through spacecraft separation, proceeds through the theory and modern approaches to CLA, and ends with up-and-coming methodologies. In the process, the technical approaches and equations of liftoff, static-elastic, buffet, gust, motor acoustics, maneuvering loads, engine transients, model reduction, and damping are covered. Many case studies will be used to illustrate the theory.
COURSE MATERIALS:
Extensive notes and references
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WHO SHOULD ATTEND:
This material is a must for anyone desiring a broad overview, a working knowledge, or the implementation theory of launch vehicle coupled loads analysis. In particular, this course is beneficial for launch vehicle engineers and managers, spacecraft engineers and managers, and anyone tasked with the oversight or execution of launch vehicle loads analysis. Each topic is covered both as an overview for those who need to understand the process and in technical detail for those who want to implement the process
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WHAT YOU WILL LEARN:
The necessary details for implementation of coupled loads analysis, including the fundamental equations of motion, derivations of environments, model integration, and interactions of loads with other technical disciplines. The class will also cover the proper review of coupled loads analysis, future directions, and preliminary loads. |
COURSE OUTLINE:
- Introduction and Review of Fundamentals
Phases of flight, equations of motion, analysis inputs and outputs, and tools
- Models
Component (Craig-Bampton) models, system integration, residual vectors, data recovery methods, sections loads, frequency cut-offs, model correlation, and uncertainty factors
- Preliminary Loads
Static load factors, interface vibration, and Mass Acceleration Curve (MAC)
- Liftoff
Different approaches including multi-body, environments of Ignition Over Pressure and ground winds, considerations of Pad dynamics and Pad configurations
- Air Loads
Static Elastic, Gust, Buffet, loads combination, Day of Launch considerations
- Engine Oscillations
Liquid engines and solid motors, special considerations for sine environments
- Other events
Engine start-ups and shutdowns, separations, staging, maneuvering loads
- Interface Vibration Environments
Sine vibration, random vibration, transient synthesis
- Future Trends
Monte Carlo, integration with Guidance, Navigation, and Control, damping, isolation
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INSTRUCTOR: Dr. Isam “Sam” Yunis
Dr. Yunis has worked on space structures for over 20 years. Of this, 15 years has been spent on launch vehicle dynamic  analysis with NASA. He has worked on developing loads and environments for over 40 ELV missions on 9 different launch vehicles. He has also been a leader in the development of the loads analysis within NASA’s Constellation Program. Dr. Yunis has been an invited speaker to many national and international conferences and he is the author of 10 papers. Dr. Yunis is a senior member of AIAA and has degrees from the University of Minnesota, North Carolina State, and Case Western |
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