Dissertation > Excellent graduate degree dissertation topics show

Research on Structural Damages Identification Based on Experimental Modal and Wavelet Analysis

Author: KangYaoQiang
Tutor: ZhangSenWen
School: Jinan University
Course: Structural Engineering
Keywords: Experimental Modal Wavelet Analysis Damage Identification
CLC: TU312.3
Type: Master's thesis
Year: 2007
Downloads: 174
Quote: 2
Read: Download Dissertation

Abstract


Due to various reasons , the construction of civil engineering structures in the run there will be varying degrees of damage , in order to protect the security, integrity and durability of the structure , the structure health monitoring , the core content of which is to structure damage identification. The damage diagnostic techniques of civil engineering structures is currently a very active area of ??research in structural engineering disciplines and have broad prospects for engineering applications , theory and techniques are constantly developing . Wavelet analysis is a new mathematical analysis and signal processing tools , especially in structural damage identification and health monitoring . Performance in non - stationary signals detailed time -frequency analysis ( traditional Fourier analysis can not ground) , extract the damage characteristics of effective and accurate detection of crack . This article is modal signals using wavelet transform analysis , on how to use wavelet analysis for damage feature extraction , identify the structural damage and positioning , including preliminary exploration done in the case of noise . The test results show that : the wavelet transform not only correct the damage location identification , and mild noise under the influence of wavelet transform can correctly identify the damage location . Experimental modal analysis techniques as a structural damage detection method based on the measurement of modal parameters such as structural frequencies , damping ratios and mode shapes relative to normal change to identify the extent and location of the injury . In this paper, experimental modal analysis data on the cantilever to adopt cOMAC method and determine the combination of experimental modal data of the location and extent of the damage . Finally , on the basis of the above research , the research of this article and summarized compare the two test methods in the detection of structural damage differences , advantages and disadvantages . And put forward recommendations for future research work and outlook .

Related Dissertations

  1. Research on Testing and Analyzing Technology for Time Parameter of Aerospace Relay,TM58
  2. Study of Event Related Potentials Based on Chinese Auditory Cognition,R318.0
  3. Research Implementation of Crack Detection Method Based on Its Acoustic Property,TP274
  4. The Study of Palmprint Image Identification Based on Wavelet Analysis,TP391.41
  5. Study of GPS Data De-noising Method Based on Wavelet and Kalman Filtering,P228.4
  6. On-line Monitoring of Tool Wear for Mass Production,TG71
  7. Numerical Study on Damage Detection of Steel Beams Based on Piezoelectric Guided Wave Propagation,TU391
  8. Development of high-resolution gamma-ray logging tool,TE927
  9. Based on Wavelet Packet Energy - neural network pyramid grid damage detection method,TU356
  10. Leakage and arc fault protection circuit breaker research,TM561
  11. Based on morphological analysis of small current grounding fault identification technology and engineering,TM862
  12. Based on wavelet analysis method for fast simulation of fluid,TP391.41
  13. Crossover model based on improved cross- modal Damage Identification Method,TU312.3
  14. FPGA-based power system harmonic detection system research and design,TM935
  15. Based on wavelet and neural network theory of power system load forecasting,TM715
  16. Analog Circuit Fault Diagnosis Method and Its Application,TN710
  17. DSP FPGA -based near-infrared detector key technology research,TN791
  18. Wavelet Analysis Based Signal Denoising Research in MEMS Gyroscope,TN911.4
  19. Application of Wavelet Analysis in Abnormal Sound Diagnosis of Motorcycle Engines,U483
  20. Study on Freeway Automatic Incident Detection Algorithm Based on Information Fusion,U491
  21. Sound signal analysis method overloaded freight train rolling bearing fault diagnosis,TH165.3

CLC: > Industrial Technology > Building Science > Building structure > Structure theory to calculate > Structural loads and structural capacity > Structural damage and accident analysis
© 2012 www.DissertationTopic.Net  Mobile