592
16 Computer Programs in Vibration Analysis
Table 16.7 Input data of a ship
4,20,11.17
.7310,.6820,.6320,.5900
47.3,145.0,200.0,200.0,182.8
192.5,192.5,192.5,192.5,192.5
192.5,192.5,192.5,192.5,192.5
192.5,172.3,145.2,109.0,72.8
431.,1085.,1234.,1109.,986.,6019.,5702.,
4296.,4296.,4304.,3511.,2731.,3050.,3346.,
3773.,4025.,4002.,3781.,1654.,261.
88.,696.,1974.,3459.,4841.,5921.,6490.,6677.,
6677.,6677.,6677.,6677.,6591.,6489.,6177.,5554.,4370.,
2631.,734.,111.
0.249,0.765,1.054,1.054,0.962,
1.013,1.013,1.013,1.013,1.013
1.013,1.013,1.013,1.013,1.013
1.013,0.908,0.765,0.574,0.383
Table 16.8 Output of the ship data
NATURAL FREQUENCY OF MODE
1 IS :
46.59
MODE SHAPES
1.112
0.8802
0.6435
0.4041
0.1732
-0.4306E-01 -0.2284
-0.3689
-0.4534
-0.4753
-0.4347
-0.3365
-0.1885
-0.2177E-02 0.2085
0.4325
0.6576
0.8729
1.079
NATURAL FREQUENCY OF MODE
2 IS :
100.2
MODE SHAPES
-0.9742
-0.6705
-0.3526
-0.3563E-01 0.2321
0.3984
0.4270
0.3261
0.1282
-0.1103
-0.3244
-0.4607
-0.4806
-0.3716
-0.1511
0.1474
0.4740
0.7738
1.036
NATURAL FREQUENCY OF MODE
3 IS :
158.2
MODE SHAPES
0.7599
0.4383
0.9867E-01 -0.2159
-0.4110
-0.3569
-0.9099E-01 0.2342
0.4568
0.4666
0.2724
-0.2896E-01 -0.3077
-0.4369
-0.3498
-0.6285E-01 0.3321
0.6946
0.9761
NATURAL FREQUENCY OF MODE
4 IS :
221.5
MODE SHAPES
-0.4757
-0.2006
0.8190E-01 0.3000
0.3459
0.6881E-01 -0.2788
-0.4093
-0.2157
0.1510
0.4104
0.3974
0.1151
-0.2390
-0.4031
-0.2434
0.1777
0.6040
0.8955
The reader may draw the mode shapes given in Table 16.8. It may be mentioned
that as the three-dimensional correction factor varies with modes, the mass matrix