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List of Figures 1 Cantilevered Frame System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
 

Summary: List of Figures
1 Cantilevered Frame System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2 Stabilization diagram for SSI algorithm with 64 block rows and composite FRF for Frame data. SSI
fit the time domain data directly; the compoiste FRF is shown only for reference. . . . . . . . . . . . . 27
3 Noisy rotation FRF at 2 m from clamped support on beam 2. . . . . . . . . . . . . . . . . . . . . . . . 27
4 Noisy displacement FRF at 1 m from clamped support on beam 1. . . . . . . . . . . . . . . . . . . . . 28
5 AMI Subtraction steps 8-11 for short record (8192 samples) frame data set. LEFT: Composite
residual FRFs (.) and fits (-). RIGHT: Nyquist composite plots of residual FRF data (.) and fits
(-). The data shown in gray in the bottom pane was ignored in Step 11. . . . . . . . . . . . . . . . . . 28
6 Monte Carlo Simulation Results for 8192 sample data from frame structure: Percent errors in Natural
Frequency (left) and Damping Ratio (right) for AMI (triangles) and SSI (circles) for each of thirty trials. 29
7 AMI Subtraction steps 1-4 for Z24 Bridge Data. LEFT: Composite residual FRF (.) and fit (-).
RIGHT: Nyquist composite plots of residual FRF data (.) and fit (-). . . . . . . . . . . . . . . . . . . 30
8 AMI Subtraction steps 5-8 for Z24 Bridge Data. LEFT: Composite residual FRF (.) and fit (-).
RIGHT: Nyquist composite plots of residual FRF data (.) and fit (-). Data shown in gray in bottom
pane was ignored in step eight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9 AMI results for Z24 bridge. Composite magnitude FRFs of data (.), AMI reconstruction (-) and the
difference (-.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
10 SIMO-AMI mode shape of Mode 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
11 SIMO-AMI mode shape of Mode 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

  

Source: Allen, Matthew S. - Department of Engineering Physics, University of Wisconsin at Madison

 

Collections: Engineering