Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Effects of Cylinder Shell Elasticity on Effective Bulk Modulus of Oil in Automotive Hydraulic Dampers

차량용 유압감쇠기 내 기름의 유효 체적탄성계수에 미치는 실린더 벽 탄성의 영향

  • 이일영 (부경대학교 기계공학부) ;
  • 손단단 (부경대학교 대학원 기계공학부)
  • Published : 2004.09.01
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Abstract

This paper presents the effects of cylinder shell elasticity on effective bulk modulus of oil $K_e$ in automotive hydraulic dampers. A theoretical model of cylinder shell bulk modulus $K_c$ based on the elasticity theory of thick-walled cylinder incorporating not only radial but longitudinal deformation is proposed. In a cylinder, values of $K_c$ by the new model and traditional models are computed and the discrepancies among them are discussed. In a twin-tube type automotive damper, the variation of $K_e$ under different pressure values in chambers of the damper cylinder, based on different theoretical models for $K_c$ is computed. Through these computations, it is shown that remarkable discrepancies in computed values of $K_e$ might occur according to the $K_e$ models in connection with $K_c$ models.

Keywords

References

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