Step 3: Combined Mode Shapes Comparison
Side-by-side comparison of all three mode shapes with confidence intervals
Interpretation Guide
This visualization compares all three mode shapes simultaneously:
- Bar heights represent the normalized mode shape amplitudes
- Diamond markers show the mean mode shape from time-window analysis
- Error bars indicate 95% confidence intervals, showing the uncertainty in each measurement
- Color coding: Mode 1 (Blue), Mode 2 (Gold), Mode 3 (Teal)
Note: The mode shapes are normalized independently for each mode, so the maximum amplitude in each mode is 1.0. This allows comparison of the relative participation of each floor within each mode.
All Mode Shapes
Physical Interpretation
Mode 1 (Fundamental)
Typically the first mode with all floors moving in the same direction. Usually has the lowest natural frequency.
Typically the first mode with all floors moving in the same direction. Usually has the lowest natural frequency.
Mode 2 (Second Mode)
Often shows one floor moving opposite to others, creating a node in the mode shape.
Often shows one floor moving opposite to others, creating a node in the mode shape.
Mode 3 (Third Mode)
Higher mode with more complex deformation pattern, typically with multiple nodes.
Higher mode with more complex deformation pattern, typically with multiple nodes.