VIBRATION RESPONSE MEASUREMENT ON SHAKING TABLE AND ITS SIMULATION USING MSC NASTRAN 4.5
Finite element method (FEM) can be used to evaluate a complex mechanical structure. Finite element method is a numerical method to approximate analytical solution. This research use MSC Nastran 4.5 as FEM software. A normal modes analysis is conducted to the developed finite element model and the re...
Saved in:
| Main Author: | |
|---|---|
| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/14843 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Finite element method (FEM) can be used to evaluate a complex mechanical structure. Finite element method is a numerical method to approximate analytical solution. This research use MSC Nastran 4.5 as FEM software. A normal modes analysis is conducted to the developed finite element model and the results are validated by measuring the mechanical structure Frequency Response Function (FRF). <br />
<br />
<br />
Based on valid finite element model, vibration response of the finite element model due to seismic excitation is evaluated using frequency/harmonic response analysis that already available in this software. The results are compared to the mechanical structure vibration responses which are measured experimentally using shaking table as excitation source. <br />
<br />
<br />
The result of this research indicates that FEM vibration response has a different value with the experimentally vibration response. The comparation between FEM vibration response and experimentally vibration response is defined <br />
<br />
<br />
as scaling factor. The value of scaling factor is 2 and constant relatively across a range of excitation frequencies. That phenomenon concludes that scaling factor can be used as a calibration factor to predict the mechanical structure vibration response. |
|---|