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ZHU Xiang, LI Tian-yun, ZHAO Yao, LIU Jing-xi. INVESTIGATING THE POWER FLOW CHARACTERISTICS OF PLATE WITH SURFACE CRACK[J]. Engineering Mechanics, 2007, 24(2): 62-067.
Citation: ZHU Xiang, LI Tian-yun, ZHAO Yao, LIU Jing-xi. INVESTIGATING THE POWER FLOW CHARACTERISTICS OF PLATE WITH SURFACE CRACK[J]. Engineering Mechanics, 2007, 24(2): 62-067.
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INVESTIGATING THE POWER FLOW CHARACTERISTICS OF PLATE WITH SURFACE CRACK

  • (College of Traffic Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China)

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  • Received Date: December 31, 1899
  • Revised Date: December 31, 1899
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    • Abstract
  • Under the excitation of harmonic force the vibrational power flow characteristics of plate with a surface crack are investigated from the view of structure-borne sound. The presence of the crack introduces the discontinuity of rotational displacement between the two sides of the crack, and the additional angle is deduced from fracture mechanics. According to the boundary conditions at the locations of force and crack, the flexural wave motion in the cracked plate is deduced，then the input power flow and the transmitted power flow in the cracked plate are calculated. The comparison between the power flow in intact plate and that in cracked plate shows that the presence of crack changes the power flow characteristics. The characteristic parameters of crack can be derived from the input and transmitted power flows. In the end, the contour lines of input power flow are constructed to identify the crack in the plate.
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