analysis代寫 - Advanced structural analysis
Second simulation project description
A new lab device is planned to be installed in an office on the same floor slab that a reciprocating
engine works. The lab device is very sensitive to vibration and could generate wrong outputs if
displacement at the device sensor reaches to a threshold. You are assigned to study effect of
vibration produced by the engine on the new device.
Mass: 3000 kg.
Frequency of vibration: 0.5 to 10 Hz.
The engine applies cyclic vertical force on the slab.
Device could be structurally modelled as in below figure in which m = 44 kg, I = 12.5 x 106 mm4
A = 2400 mm2
, L = 1.3 m, mass per unit length = 19.5 kg/m.
5 I, 2 A
Floor plan is shown below. Slab thickness is 400 mm. Consider column connection to foundation as
Make reasonable assumptions if needed.
Use SAP2000 and
a- Consider three damping ratios in the device and draw diagrams for max displacement
response of the lump mass (m = 44 kg) in the device versus engine frequency. Draw three
diagrams in one single plot. b- Consider three options of increase in slab thickness underneath the engine and draw
diagrams for max displacement response of the lump mass (m = 44 kg) in the device versus
engine frequency. Draw three diagrams in one single plot.
c- Submit your results i.e. two sets of diagrams (two plots) as described above along with your
SAP2000 model through the link for this assignment in Learn Line.
Tip: watch this video: http://www.youtube.com/watch?v=VjkqA4_hlMk.