3.12 Transient Vibration
Consider the piezoelectric semiconductor rod in Fig. 3.21. The left end is fixed. At
t ¼ 0, the right end is under the action of a suddenly applied extensional force
F which produces an extensional stress f ¼ F/A there [9].
The one-dimensional governing equations are the same as Eqs. (3.131), (3.132),
(3.133), (3.134), and (3.135). We consider a ZnO rod doped into an n-type
Fig. 3.20 (a) Input power verses frequency. (b) Output power versus frequency. (c) Efficiency
versus frequency. n 0 ¼ 1 Â 10
22
/m
3
3.12 Transient Vibration
67
Consider the piezoelectric semiconductor rod in Fig. 3.21. The left end is fixed. At
t ¼ 0, the right end is under the action of a suddenly applied extensional force
F which produces an extensional stress f ¼ F/A there [9].
The one-dimensional governing equations are the same as Eqs. (3.131), (3.132),
(3.133), (3.134), and (3.135). We consider a ZnO rod doped into an n-type
Fig. 3.20 (a) Input power verses frequency. (b) Output power versus frequency. (c) Efficiency
versus frequency. n 0 ¼ 1 Â 10
22
/m
3
3.12 Transient Vibration
67