Nonlinear Dynamics of an Electrorheological Sandwich Beam with Rotary Oscillation

Table 1

Comparison of natural frequencies and loss factors obtained herein with those of [19] (𝐿=381 mm, 𝑏=25.4 mm, ℎ₁=ℎ₃=0.79 mm, ℎ₂=0.5 mm, 𝐸=3.5 kV/mm, 𝐺^∗₂=612500(1+0.011i)).

Mode	Natural frequency 𝑓 (Hz)		Loss factor 𝜂
	Present	Ref.	Present	Ref.
1	10.011	10.005	0.00393	0.00395
2	40.091	40.051	0.00507	0.00512
3	89.125	89.028	0.00459	0.00461
4	152.926	152.702	0.00336	0.00339
5	236.396	235.761	0.00244	0.00250