As steam turbine is concerned, frequentstarts-stops and great range changes in load usually cause rapid changesin temperature and tremendous thermal stress on rotor, which usually leadto low-cycle-fatigue (LCF) damages.

• 就汽轮机而言，由于频繁的启停或大幅度负荷变动，汽轮机转子要经常承受剧烈的温度变化和交变热应力，因而导致产生低周疲劳损耗。