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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:

Include extensive notes and reference materials.

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

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:

  1. Introduction and Review of Fundamentals
    Phases of flight, equations of motion, analysis inputs and outputs, and tools
  1. Models
    Component (Craig-Bampton) models, system integration, residual vectors, data recovery methods, sections loads,
    frequency cut-offs, model correlation, and uncertainty factors
  1. Preliminary Loads
    Static load factors, interface vibration, and Mass Acceleration Curve (MAC)
  1. Liftoff
    Different approaches including multi-body, environments of Ignition Over Pressure and ground winds, considerations of
    Pad dynamics and Pad configurations
  1. Air Loads
    Static Elastic, Gust, Buffet, loads combination, Day of Launch considerations
  1. Engine Oscillations
    Liquid engines and solid motors, special considerations for sine environments
  1. Other events
    Engine start-ups and shutdowns, separations, staging, maneuvering loads
  1. Interface Vibration Environments
    Sine vibration, random vibration, transient synthesis
  1. Future Trends
    Monte Carlo, integration with Guidance, Navigation, and Control, damping, isolation

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

L A U N C H S P A C E

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