1. Piezoelectric Device Laboratory, School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo, Zhejiang, China
2. Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, Missouri, USA
3. Department of Mathematics, School of Sciences, Ningbo University, Ningbo, Zhejiang, China
4. School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan, Hubei, China