The formulas of calculating the mean indicated pressure,the resulting tangential forces of gas and mass excitations,the outer damping,which are the most important calculating formulas of calculating ship shafting torsional vibration.
对船舶轴系扭振计算中最为主要的公式,平均指示压力、气体力所产生的干扰力矩、外阻尼等进行探讨和修正,完善了船舶轴系扭振计算,提高扭振计算的精度。
IMEP Estimation from Measurement of Crankshaft Transient Speed Fluctuation;
利用实测发动机瞬态转速波动估计平均指示压力
Then using the Simulink software,the corresponding instantaneous heat release process for mean maximum indicated pressure in 2 000 working cycles in different test points was analyzed,With other parameters unchanged,the ignition angle increased,the start point of heat release advanced and the process of heat release was symmetrical.
利用Simulink分析了汽油机不同试验点2000个工作循环中平均最大指示压力对应瞬时放热过程。