Using n=m=1n=m=1, the influence of

Using n=m=1n=m=1, the influence of the model parameter variations on the performance of the energy harvester is investigated. These parameters are parametric and external excitation amplitudes εε and δδ, damping coefficient c¯c¯, load resistance parameter RLRL and electro-mechanical coupling coefficient α¯α¯. The base excitations are considered as harmonic excitation. ψ=0ψ=0 is assumed. In the absence of specified cases, the results presented in this paper are calculated with the geometric and material parameters given in Table 1. Using the geometric and material coefficients defined in Table 1, all parameters of Eqs. (34) and (35) are as followsσ¯=−0.7854, β=40.4407, κ=4.5968,ζ=2.7530, γ=10.4326, λ¯=0.7830,α¯=−0.4119, ω¯=3.5160,ω0=188.9150, Cp=8.3884×10−8.σ¯=−0.7854, β=40.4407, κ=4.5968,ζ=2.7530, γ=10.4326, λ¯=0.7830,α¯=−0.4119, ω¯=3.5160,ω0=188.9150, Cp=8.3884×10−8.5.1 Only under parametric excitationIn this section, using the presented analytical expression, the numerical results under parametric excitation are obtained. Figure 2 gives the frequency–response curves of the deflection and output power amplitude in the case of different parametric excited amplitude εε when δ=0,c¯=0.01δ=0,c¯=0.01 , and RL=500 ΩRL=500 Ω . Figure 2 shows that when δ=0δ=0 (only parametric excitation), electrical energy can only be harvested within a certain range of excitation frequencies where the non-trivial solutions exist. Outside of this range, only the trivial solution w¯=0w¯=0 exists and no electrical energy can be harvested.