A two level structure with a floor mass of 1200kg per floor is supported by beams and columns of effective stiffnesses o
Posted: Sat May 21, 2022 2:59 pm
A two level structure with a floor mass of 1200kg per floor is
supported by beams and columns of effective stiffnesses of 3600N/m
and 2400N/m for the 1st and 2nd floors respectively. Assuming that
the 1st floor would be displaced 75mm to the right for both modes
of vibration, perform the modal analysis for this multi - degree of
freedom system.
Your answers would be of great help 
Thank you!
Is one of the natural frequencies (in 1/s2) of the MDOF system: 0.8377 2.4495 7.1623 1.0000 The displacement (in mm) of the first floor using the first natural frequency: 150 75 37.5 104.5575
The displacement (in mm) of the second floor using the second natural frequency: -104.5575 54.0566 75 -37.5 The displacement (in mm) of the second floor using the first natural frequency: 75 150 37.5 54.0566
The displacement (in mm) of the first floor using the second natural frequency: 75 -150 -54.0575 O 104.5575
supported by beams and columns of effective stiffnesses of 3600N/m
and 2400N/m for the 1st and 2nd floors respectively. Assuming that
the 1st floor would be displaced 75mm to the right for both modes
of vibration, perform the modal analysis for this multi - degree of
freedom system.
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Thank you!Is one of the natural frequencies (in 1/s2) of the MDOF system: 0.8377 2.4495 7.1623 1.0000 The displacement (in mm) of the first floor using the first natural frequency: 150 75 37.5 104.5575
The displacement (in mm) of the second floor using the second natural frequency: -104.5575 54.0566 75 -37.5 The displacement (in mm) of the second floor using the first natural frequency: 75 150 37.5 54.0566
The displacement (in mm) of the first floor using the second natural frequency: 75 -150 -54.0575 O 104.5575