Research Article

Free Vibration of Laminated Composite Hypar Shell Roofs with Cutouts

Table 2

Values of “ ” for 0/90/0/90 hypar shell.

Boundary conditionsCutout size ( )
00.10.20.30.4

CCCC0−1.56−5.48−10.01−12.94
CSCC0−0.9−3.87−14.97−22.62
CCSC0−0.99−5.88−16.04−23.3
CCCS0−0.9−4.33−15.42−22.76
CSSC0−1.12−8.24−20.47−30.27
CCSS0−1.12−8.24−20.47−30.27
CSCS00.38−1.67−4.16−4.21
SCSC00.38−1.71−4.29−4.43
CSSS00.3−1.05−3.35−5.53
SSSC00.3−1.09−3.45−5.74
SSCS00.33−1.06−3.35−5.54
SSSS00.23−0.63−2.92−6.08

, , , ; / = 25, = 0.2 , = = 0.5 , .