Transcript
Prima Erfido Manaf(J2D009030)
Endriasmoro M.(J2D009029)
Arga Brahmantyo (J2D009027)
Nur Rachmaningtias (J2D009026)
Damping Tools Geopsy
By 4 th Group
Agnis Triahadini(24040110120026)
Function
.
identifying pollution by continuous,
monochromatic signals
Advanced signal
processing toolbox
identifying industrial vibration sources
Background Parameter
Damping Ratio is a parameter representing the energy loss of an
oscillating system.
The loss can be either internal (material damping) or another system (radiated
damping)
The Damping toolbox is used in Geopsy after detecting peaks in
the Power Spectrum or the Structure spectrum
In this presentation we don’t explain both of them, therefore we will turn to the next step directly
Practical Use
After choose damping tools,damping toolbox will appear
Damping ratio toolbox
The Damping toolbox is divided into 3 parts:
Filter Time Limits
Parameters of the Random
Decrement technique
Filter
Filtering can be activated by checking Filter signal before processing. Applying a
narrow band filter is generally necessary in order to select the frequency band of the interesting peak, since other peaks are
generally existing in the spectrum
Time Limits
The time limits define the signal range on which the Random Decrement
Technique is applied. Options for Time Limits are defined in the corresponding
section
Parameters of the Random Decrement technique
In Geopsy, two parameters can be customized to compute the damping ratio using the Random Decrement technique:
Window Length Fitting Length
Result
Each graph includes 1 layer with 4 lines representing
solid black line dashed black line solid red line
In an oscillating structure like a building, the damping ratio generally ranges between 1 and
10%. Slightly lower values are possible for slender structures. Higher damping cannot
generally be detected in recordings because of too low energy.
Thank You
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