An Improved Fourier Series Method for the Free Vibration Analysis of the Three-Dimensional Coupled Beams

Table 2

Parameters of each beam.

Parameter	Unit	Beam 1	Beam 2
	m	0.24	0.8
	m^2	0.0009	0.0009
	m^4
	Nm^−2
	Kgm^−3	7800	7800