Launch Vehicle Coupled Loads Analysis: Theory and Approaches

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Launch Vehicle Coupled Loads Analysis: Theory and Approaches – On-Demand Short Course

Instructed by Dr. Sam Yunis, recently retired Senior NASA Engineer

ü Taught exclusively to NASA employees, now available as a public course for the first time

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

OVERVIEW

Coupled Loads Analysis (CLA) is a complex analysis to compute design loads on launch vehicles and spacecraft. The results of CLA are often in the critical path to closing design margins. Therefore, appropriate and accurate CLA results are the basis of successful launch vehicle and spacecraft missions.
The details of any CLA are specific to the launch vehicle and how it flies. However, the building blocks and fundamentals are consistent across all vehicle analyses. This course reviews the key basics of structural dynamics, then uses those fundamentals to create the building blocks of CLA, and finally uses those building blocks in CLA. At the conclusion of the course, the student will have a foundation to understand and develop new CLA capabilities.

In addition to classic CLA material, much of the course is spent on model development and reduction. Good model reduction is as critical to accurate loads as understanding the theory of numerical integration.

CLA flight events covered are ground loads, liftoff, aerodynamic flight, maneuvering, engine ignitions and shutdowns, staging, and engine oscillations. These are also discussed from the perspective of day-of-launch assessments, preliminary loads, and interface environments.

Tag(s) Space, On-Demand Short Course

Launch Vehicle Coupled Loads Analysis: Theory and Approaches – On-Demand Short Course

Description

LEARNING OBJECTIVES

Understanding modes and reduced order modeling as needed for CLA
Understanding how to build high-quality component models, including Craig-Bampton models, damping, and data recovery
Understanding the building block of CLA including numerical integration, time domain methods, and frequency domain methods
Understanding how to define and use preliminary loads
Understanding the theory and implementation of CLA for all key events: Ground, Liftoff, Ascent (see the outline for details)
Incorporating systems engineering into CLA
Getting ready for the future of CLA
Detailed outline below

AUDIENCE: This course is essential for all early to mid-career engineers and graduate students seeking a deeper understanding of CLA. The course will be useful for all senior CLA analysts who want awareness of some different techniques or a refresher on existing ones. The course may also be useful for those groups providing models for CLA, to create better models by understanding how the models are used.

MATERIALS: All course slides and additional references will be available for immediate download. Stream the 12 hours of video recordings anytime, 24/7. No part of these materials may be reproduced, distributed, or transmitted, unless for course participants. All rights reserved.

CERTIFICATE: Receive an AIAA Course Completion Certificate upon viewing all course recordings. Please contact Lisa Le for a certificate.

COURSE FEES (Sign-In To Register)
- AIAA Member Price: $745 USD
- Non-Member Price: $945 USD
- AIAA Student Member Price: $495 USD

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OUTLINE

Fundamentals of Structural Dynamics

Modes and reduced order modeling to matrix form
Numerical integration of diagonal and coupled systems
Frequency domain solutions including the FFT, PSD, and SRS
Inertia relief
Statistics of loads

Preliminary Loads

Center of Gravity Load Factors
Mass Acceleration Curve
Vibration Spectra
Synthetic Transients
Tools

Making Good Models

Beam Representations
Component Model Reduction
System Model Integration
Damping Approaches
Data recovery: Residual Vectors and Mode Acceleration
Section Loads
Model Correlation
Uncertainty Factors

CLA: Ground and Prelaunch

Ground Winds
Rollout
Transportation and Handling

CLA: Liftoff

Forcing Functions
Multibody Integration and Pad Release
Monte Carlo

CLA: Ascent

Aerodynamic Static Elastic (STEL)
Aerodynamic Gust
Buffet
Maneuvering Loads
Loads Combination
Day of Launch (DOL) Considerations

CLA: Other Flight Events

System ID
Engine Oscillations and Pogo
Start-ups and Shutdowns
Separations or Staging
Reentry and Landing

Systems Engineering, Tools, and the Future

INSTRUCTOR

Dr. Isam (Sam) Yunis has more than 30 years of experience in aerospace engineering, predominately related to NASA programs/projects. His primary expertise is in dynamic loads for launch vehicles and spacecraft. This expertise includes analysis and testing specifically related to coupled loads analysis (CLA), vibration, vibroacoustics, shock, and crew loads. He has led the loads and dynamics analysis and testing for two major NASA Programs from inception to steady state, the Launch Services Program (LSP) and the Commercial Crew Program (CCP).

Through many technical and leadership roles, Sam has reviewed and performed analysis on over 50 flown spacecraft including Cassini, Mars Missions, Pluto New Horizons, ISS, Orion MPCV, Crew Dragon, and Starliner. Over the past 30 years, he has provided expertise to support almost every U.S. launch vehicle including Titan, Atlas, Delta, Falcon, Taurus, Pegasus, Ares, SLS, Launcher-1, Terran, and Stratolaunch.

Classroom hours / CEUs: 12 classroom hours / 1.2 CEU/PDH

Contact: Please contact Lisa Le or Customer Service if you have questions about the course or group discounts (for 5+ participants).

Courses in package:

	Title	Credit(s)
1	Course-Notes-Coupled-Loads-Analysis-Spring-2023-Final View Details
2	Lecture-1-Recording-Coupled-Loads-Analysis-Spring-2023 View Details
3	Lecture-2-Recording-Coupled-Loads-Analysis-Spring-2023 View Details
4	Lecture-3-Recording-Coupled-Loads-Analysis-Spring-2023 View Details