• 제목/요약/키워드: 부가비틀림응력

검색결과 3건 처리시간 0.017초

디젤기관 추진축계의 설계를 위한 비틀림 진동해석 전산프로그램의 개발 (Development of Computer Program of Torsional Vibration Analysis for Design of Diesel Engine Propulsion Shafting)

  • 최명수;문덕홍;심재문
    • 동력기계공학회지
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    • 제7권2호
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    • pp.23-28
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    • 2003
  • It is very important to analyze the torsional vibration for the propulsion shafting of ship. The authors have developed the transfer stiffness coefficient method(TSCM) as a vibration analysis algorithm. The concept of the TSCM is based on the successive transfer of stiffness coefficient. The effectiveness of the TSCM was verified through many applications. In this paper, the TSCM is applied to the torsional free vibration analysis for the propulsion shafting of an actual shin with a diesel engine. In order to calculate the additional torsional stresses of the propulsion shafting the torsional forced vibration for the shafting is analyzed by using both the modal analysis method and the results of the torsional free vibration analysis by the TSCM. The accuracy of the present method is confirmed by comparing with the vibration analysis results of engine maker.

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부등간격 크랭크 배치각에 의한 디젤 발전소 축계의 비틀림진동 제어 (Control of Torsional Vibration using Uneven Crank Angels on the Shafting for Diesel Power Plant)

  • 이돈출;유정대;김정렬
    • 소음진동
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    • 제10권4호
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    • pp.655-661
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    • 2000
  • Diesel power plant can be used as a power supplier for the isolated place where consumption of electric power is variable. The reason is that mobility and durability of diesel engine is superior to those of other thermal engines. However, there are some disadvantages for using these diesel engines such as bigger vibratory excitation force comparing to the others, which result from high combustion pressure of cylinders and inertia force of piston reciprocating masses. In this paper, control and optimization of torsional vibration of 12K90MC-S engine for diesel power plant using uneven crank angles is identified by theoretical analysis and vibration measurement.

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가변익 프로펠러를 갖는 추진축계의 비틀림진동에 관한 연구 (A Study on the Torsional Vibration of propulsion Shafting System with Controllable Pitch Propeller)

  • 이돈출
    • Journal of Advanced Marine Engineering and Technology
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    • 제22권5호
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    • pp.626-634
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    • 1998
  • Controllable pitch propeller(CPP) is usually adopted for easy and effective engine controls of a ship in a port. Unfortunately the torsional vibration may occur by a certain variation of engine torque and the major resonance peak may exist within the maximum continuous rating(MCR) In these cases an additional stress concentration on the oil passages such as longitudinal slots notches and circular holes of an oil distributor shaft(ODS) occurs by the torsional vibration of the CPP shaft. In this paper an analysis for the fatigue limit of an ODS system of the 5S70MC engine in a crude oil carrier is done by applying FEM and empirical formulas. Furthermore the additional stress on the ODS is investigated by analyzing the torsional vibration of the shaft system and a control method in which a tuning damper is adopted is introduced in the case of the additional stress exceeds the fatigue limit. The validity of analysis method is verified by comparing the results acquired by an actual measurement of the vibratory torque for the above ODS

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