Journal of KSNVE (소음진동)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
권호 표지

A Prediction Model of Piston Slap Induced Vibration Velocity of Engine Block Surface

피스톤 슬랩에 의해 발생되는 엔진 블록의 표면 진동 속도 예측 모델

  • 안상태 (한국과학기술원 대학원 기계공학과) ;
  • 조성호 (한국과학기술원 대학원 기계공학과) ;
  • 김양한 (한국과학기술원 기계공학과) ;
  • 이동수 (대우중공업(주))
  • Published : 1999.06.01
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Abstract

Piston slap is one of the sources producing engine block surface vibration and mechanical noise. To analyze piston slap-induced vibration, a realistic but simple model is proposed and verified experimentally. A piston is modeled by 3 degree of freedom system and an impact point between piston skirt and cylinder wall by 2 degree of freedom system. Numerical simulation estimates impact forces of piston in cylinder, and the engine block surface vibration response is predicted by the convoluton of the impact forces with measured impulse responses. Experimental verification on the predicted response has been also performed by using a commercial 4-cylinder diesel engine. the predicted and experimental vibration responses confirm that the suggested model is practically useful.

Keywords

References

  1. J. Sound and Vibration v.2 no.2 Vibration and Noise due to Piston Slap in Reciprocating Machinery E. E. Unger;D. Ross
  2. J. Sound of Vib. v.1 no.4 Some Aspects of Vibration of a Single Cylinder Diegel Engine W. J. Griffiths;J. Skorecki
  3. SAE Paper 972043 A Numerical Approach for Piston Secondary Motion Analysis and its Application to the Piston Related Noise T. Nakada;A. Yamamoto;T. Abe
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