| 摘要 | 第1-5页 |
| ABSTRACT | 第5-9页 |
| 1 Exordium | 第9-30页 |
| ·Introduction | 第9-10页 |
| ·The research advances of damage detection techniques based on modal analysis | 第10-15页 |
| ·The research advances of damage detection techniques based on signal processing | 第15-20页 |
| ·The theory of Lamb wave | 第20-26页 |
| ·Lamb wave modes | 第20-21页 |
| ·The dispersion of Lamb waves | 第21-26页 |
| ·The numerical simulation methods on elastic wave problems | 第26-29页 |
| ·Conclusion | 第29-30页 |
| 2 Description of the pseudospectral Mindlin plate element | 第30-37页 |
| ·Shape functions and grid points | 第30-31页 |
| ·Theory of pseudospectral plate element and integration scheme | 第31-37页 |
| 3 The accuracy and efficiency of pseudospectral Mindlin plate element | 第37-46页 |
| ·Introduction | 第37页 |
| ·A static problem | 第37-40页 |
| ·A dynamic problem | 第40-43页 |
| ·A 1D wave propagation problem | 第43-44页 |
| ·Conclusion | 第44-46页 |
| 4 Confirmation the reliability of damage detection technique based on Lamb waves | 第46-57页 |
| ·Introduction | 第46页 |
| ·Experimental verification and numerical simulation of Lamb wave propagation in an aluminum plate with a hole | 第46-50页 |
| ·Experimental and numerical analysis procedure for CFRP beams | 第50-53页 |
| ·Comparison of experimental and numerical results of composite beams | 第53-56页 |
| ·Conclusion | 第56-57页 |
| 5 The characteristic of Lamb wave propagation in an aluminum plate with damage | 第57-69页 |
| ·Introduction | 第57页 |
| ·Verification of the effect of dispersive | 第57-59页 |
| ·The effect of cycle number | 第59-62页 |
| ·The effect of shape of the damage | 第62-63页 |
| ·The effect of excitation frequency | 第63-67页 |
| ·The effect of incident angle of Lamb wave | 第67-68页 |
| ·Conclusion | 第68-69页 |
| 6 The characteristic of Lamb wave propagation in CFRP delaminated beams | 第69-91页 |
| ·Introduction | 第69页 |
| ·Wave signals for beams with a delamination at different excitation frequencies | 第69-73页 |
| ·The optimal excitation frequencies for various delaminations | 第73-78页 |
| ·The natural frequencies of local delaminated region | 第78-89页 |
| ·The model based on the local delaminated region | 第78-79页 |
| ·The relationship between the optimal excitation frequency and the natural frequencies of local delaminated region | 第79-89页 |
| ·Conclusion | 第89-91页 |
| 7 Summary | 第91-94页 |
| Acknowledgements | 第94-95页 |
| References | 第95-102页 |
| Appendix | 第102页 |
| The papers published during author’s master period | 第102页 |
