In section 4 we cover the most important topic in the course - modal analysis. We’ll spend plenty of time here making sure you understand concepts like mode shapes, orthogonality and what it means to uncouple the equations of motion. You’ll see that modal superposition as a solution strategy offers us major advantages over the direct integration we discussed in the previous section. By the end of this section, you’ll have a deep understanding of modal analysis and be comfortable implementing it.
19. What is modal analysis and how does it help us?
20. Finding natural frequencies and mode shapes
20.1 Jupyter Notebook - (lecture 20)
21. Matrix representation and the eigenproblem
21.1 Jupyter Notebook - (lecture 21)
22. Modal matrix and mass normalisation
22.1 Jupyter Notebook - (lecture 22)
23. Orthogonality and Decoupling Equations of Motion
24. Modal superposition - forced vibration
25. Comparing modal superposition with direct integration - forced response
26. Visualising the forced vibration response
26.1 Jupyter Notebook - (lecture 24-26)
27. Modal superposition - free vibration
28. Compare modal superposition with direct integration - free vibration
28.1 Jupyter Notebook - (lecture 27-28)