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在柴油机轴系扭转振动的计算中,气体压力变化引起的干扰力矩简谐分析的结果,对扭振计算精度具有重要的意义。本文通过对四冲程柴油机理论示功图进行切力矩简谐分析的研究,在计算了大量各种示功图的基础上,探讨了对简谐系数影响较大的因素,通过回归方法,得出简谐系数的计算公式。该公式用于任一种机型,可以较简便地求出相应的简谐系数值。
In the calculation of torsional vibration of diesel engine shaft system, the result of harmonic analysis of disturbance torque caused by gas pressure change is of great significance to torsional vibration calculation accuracy. In this paper, the theoretical analysis of the four-stroke diesel dynamometer cutting moment harmonic analysis of the study, calculated a large number of various kinds of dynamometer, based on the discussion of the harmonic coefficient has a greater impact on the factor, obtained by regression Simple harmonic coefficient of the formula. This formula can be used in any type of machine, and the corresponding simple harmonic coefficient can be calculated easily.