to lower the natural frequency has faced a bottleneck. The length of beam Рand weight of mass can not increase without limit. In order to find another way to reduce Рthe inherent frequency, design a non-posite piezoelectric beam. Use Рfinite element analysis software parative analysis non-axisymmetrical and basic Рposite piezoelectric beam in the same dimensions. And then do research in Рthe size of non-axisymmetrical piezoelectric beam with its performance effect. Finally, Рhave experiments of the two kinds of beams. The result show non-axisymmetrical beam Рhas better performance. Р The study on non-posite piezoelectric beam has certain Рinnovation and research value. Р РKey Words:energy harvesting, vibration energy, piezoelectric structure, non-axisymmetric, Рfinite element analysis Р ІІ
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