1. Associate Professor, College of Field Engineering, Army Engineering Univ. of PLA, No. 1 Haifuxiang, Qinhuai District, Nanjing 210007, P. R. China (corresponding author).
2. Postgraduate Student, College of Field Engineering, Army Engineering Univ. of PLA, No. 1 Haifuxiang, Qinhuai District, Nanjing 210007, P. R. China.
3. Associate Professor, College of Field Engineering, Army Engineering Univ. of PLA, No. 1 Haifuxiang, Qinhuai District, Nanjing 210007, P. R. China.
4. Professor, College of Mechanics and Materials, Hohai Univ., No. 1 Xikang Rd., Gulou District, Nanjing 210098, P. R. China.
5. Professor, College of Mechanical and Power Engineering, Nanjing Univ. of Technology, No. 30, South Puzhu Rd., Pukou District, Nanjing 211816, P.R. China.
6. Lecturer, College of Field Engineering, Army Engineering Univ. of PLA, No. 1 Haifuxiang, Qinhuai District, Nanjing 210007, P. R. China.