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A Comparison of Design Methodologies for Journal Bearings under Pulsatile Loads

By Colin Herapath, S M Barrans and W Weston


The paper expands the work by Kinnear and Weston[1] on squeeze film bearing design to the general case and compares the revised methodology with classical bearing design[2,3,4] and hybrid bearing design[5]. The analysis, which employs a partial differentiation of the Poisseuille and Hagen-Poiseuille bearing flow equations, enables a mathematical model for the bearing squeeze film to be developed. This yields a transfer function between bearing displacement and load. Subsequent parameter maps are developed from the transfer function for stiffness and damping coefficients.The method enables hybrid journal bearings under pulsatile load to be considered. Current design methodologies employed do not cater for this situation adequately which limits effective design of these bearings in applications such as in internal combustion engine crankshaft bearings

Topics: TJ, TL
Year: 2011
OAI identifier:

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  2. (1953). Analytical Derivation and Experimental Evaluation of Short Bearing Approximation for Full Journal Bearings’’, NACA report 1157,
  3. (1979). And Koshal,,D., ‘’Static and Dynamic properties of Concentric Hybrid
  4. (1981). Fluid Film Journal Bearings operating in a Hybrid Mode: PartI – Theoretical Analysis and Design’’, doi
  5. (1981). Fluid Film Journal Bearings operating in a Hybrid Mode: PartII doi
  6. Fundamentals of Fluid Film Lubrication’’, doi
  7. Hybrid Journal Bearings with particular reference to hole entry configurations’’, doi
  8. (1969). Lubrication Theory and its Application, BP Trading Limited,
  9. Rowe,W.B.,‘’Hydrostatic Bearing Design’’Butterworths, doi

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