›› 2003, Vol. 24 ›› Issue (2): 188-193.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Physical meanings of kinematics in centrifuge modelling technique

LEI Guo-hui, SHI Jian-yong   

  1. Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China
  • Received:2002-03-14 Online:2003-02-10 Published:2014-08-19
  • About author:LEI Guo-hui，Male, Born in 1972, PhD, Associate Professor, Major in basic soil behaviour, foundation engineering, numerical analysis and soft ground improvement techniques.

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Abstract: Investigates the kinematics in centrifuge modelling which are highly useful for improving the understanding of results from centrifuge modelling tests. Mathematical expressions of the global velocity and acceleration of an arbitrary particle in a centrifuge model, which describe the motion of the particle, are derived. The acceleration is a critical factor in centrifuge modelling because it links kinematics to dynamics through Newton second law. The physical meaning of each term of the derived expression for global acceleration is described. Contributions of the centripetal acceleration in steady flight, the tangential acceleration due to the effect of the angular acceleration, the Coriolis component of acceleration, the radial (the vertical direction at prototype), circumferential and axial (the two horizontal directions at prototype) shaking effects and the elongation effect of the centrifuge arm to the global acceleration of a particle in centrifuge modelling are identified in the expression of the global acceleration. It is found that, for ease of comprehension of test results from dynamic centrifuge modelling by means of uniaxial shaking, the preferred direction of shaking is in the axial direction (parallel to the axis of rotation). In addition, a description of the kinematics in centrifuge modelling proposed by Schofield [1] is critically examined and is found to be confusing.

Key words: centrifuge modeling, kinematics, dynamics, physical meaning, shaking

CLC Number: 

  • TH 113.2
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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