Orthotropic Models of Corrugated Sheets in Finite Element Analysis

Table 5

Comparison of the first six eigen modes of the orthotropic models and the original model. The different types refer to the type of eigen mode defined in the original model, for example, type b is the first bending mode around the 𝑥-axis, cf. Figure 5(b). The reduction of frequency compared to the original model is represented by Δ.

Original		Liew		Samanta		Briassoulis
Type	Frequency	Frequency	Δ	Frequency	Δ	Frequency	Δ
—	(Hz)	(Hz)	(%)	(Hz)	(%)	(Hz)	(%)
a	0.18	0.15	16.57	0.25	−38.67	0.15	17.13
b	1.06	1.03	2.83	0.98	7.26	1.03	2.83
c	1.12	1.07	4.46	1.10	1.79	1.07	4.46
d	1.24	1.14	8.06	1.23	0.81	0.90	27.5
e	1.29	1.17	9.30	1.32	−2.33	0.94	26.82
f	1.80	1.63	9.44	1.85	−2.78	1.48	17.78