An Efficient Spectral Element Model with Electric DOFs for the Static and Dynamic Analysis of a Piezoelectric Bimorph

Table 3

Natural frequencies for different order of Legendre polynomials (Hz).

Mesh	2 quadrilaterals		3 quadrilaterals		8 quadrilaterals
Mode	1	2	1	2	1	2
𝑁=2	6438	14731	6292	14403	6199	14183
𝑁=3	6241	14286	6213	14183	6196	14171
𝑁=4	6201	14180	6192	14171	6191	14168
𝑁=5	6193	14176	6191	14166	6191	14166