18.9 - Modal Combination Techniques
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
What does SRSS stand for?
💡 Hint: Think about combining squares of values.
When would you use the CQC method?
💡 Hint: Consider phase relationships.
2 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
Which method is used when the modal frequencies are well-separated?
💡 Hint: Think about their separation in terms of correlation.
The CQC method is necessary for which type of scenarios?
💡 Hint: Recall what phase relationships affect.
1 more question available
Challenge Problems
Push your limits with advanced challenges
Given three modal responses: R1 = 10, R2 = 7, and R3 = 5; apply both the SRSS and CQC methods if ρ_12 = 0.5, ρ_13 = 0.3, ρ_23 = 0.4.
💡 Hint: Set up the systems cleanly to ensure correlation checks are accounted for.
If a building's two closest modes show high correlation, discuss how it could affect your selection of SRSS vs CQC.
💡 Hint: Think about the phase and how strongly they interact with each other.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.