Question

For the frame shown below, Determine n, D, Tn, TD, Amplitude after 2 cycles if u1 = 1 using  = 0.05 & 0.1, Amplitude after 3 cycles if u1 = 1 using  = 0.05 & 0.1.

Example: For the frame shown below, Determine on, Op. The To. Amplitude after 2 cycles if u = 1 using & = 0.05 & 0.1, Amplitude after 3 cycles if u = 1 using & = 0.05 & 0.1. 200 lb/ft W8 X 24 L-1S Solution: The parameters of this model may be computed as follows: W = 200 x 25 = 5000 lb | = 82.5 in E = 30x10 psi 12E(21) 12x30x10° x165 (15x12) k = 10,185 lb/in (Ans.)

Answer 1

Given W= 5000 lb K 10185 bin 5000 12.94 b-Sec 386.4 in/sec fn 10185 N13.44 a8.05 Yad/fnch K 0 22 Sec aon RS 05 for {) -६ 28. 015 Yadin 28.05 1-0.05 yde 2eyde

TD = O.224 Sec 28.015 U2 ax (2) Uz0.533 -0.05 ,!, inch U3=0.533 ( - 'n axax X O) uz 0.285

for &0-0 er.05 -0.05 8.0 X > ১০ () 3x axAy O.05 44 0.38ncb tor 0.1 In 3x2 for005 28 05 Tadnck wD= 8-015 fad/inek TD T 0.22 Sec 0.224 Scc

for WD 7.909 Yad linck TD0.225Sec