| 摘要 |
PURPOSE:To perform highly accurate monitoring of life of parts through online basis, by measuring the temperatures and the internal liquid pressures of pressure resisting parts, and determining consumption life due to creep and fatigue based on change with time in stress caused by the temperature and pressure. CONSTITUTION:The temperatures and the internal pressures at a plurality of observing points of a pressure resisting part 11 are measured by a temperature and pressure detector 12. The stress of the part 11 caused by the temperature and the pressure is computed by an inner and outer temperature difference operator 13 and a stress operator 14. The time change curve of the stress is computed by a stress range operator 15, and a fatigue damage rate is computed by a fatigue damage rate operator 17. Meanwhile, a creep damage rate is computed by a stress actiono perator 16, which computes action time, and a creep damage rate operator 18. Based on the fatigue and the creep, a life consumption rate operator 19 computes and determines a life consumption rate highly accurately. Thus, the life is monitored online highly accurately. |
