US 11,698,000 B2
Damage evaluation device, damage evaluation method
Tetsuya Shitaka, Yokohama (JP); Yusuke Suzuki, Yokohama (JP); and Yoshikazu Ninomiya, Nerima (JP)
Assigned to TOSHIRA ENERGY SYSTEMS & SOLUTIONS CORPORATION, Kawasaki (JP)
Filed by TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION, Kawasaki (JP)
Filed on Jul. 5, 2022, as Appl. No. 17/857,418.
Claims priority of application No. 2021-111442 (JP), filed on Jul. 5, 2021.
Prior Publication US 2023/0003138 A1, Jan. 5, 2023
Int. Cl. F01D 21/00 (2006.01)
CPC F01D 21/003 (2013.01) [F05D 2220/31 (2013.01); F05D 2260/80 (2013.01); F05D 2270/303 (2013.01); F05D 2270/331 (2013.01); F05D 2270/332 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A damage evaluation device that evaluates damage of equipment, the damage evaluation device comprising:
an operation data obtaining unit, implemented by processing circuitry, which obtains operation data indicating a state of the equipment detected by a sensor disposed at a predetermined position of the equipment, the state of the equipment including a generated stress by load of the predetermined position of the equipment;
an operating state quantity evaluation unit, implemented by the processing circuitry, which calculates an operating state quantity including at least one of temperature and the generated stress at a predetermined evaluation-target site of the equipment, based on a relational formula of the stress of the predetermined evaluation-target site of the equipment with the operating state quantity, previously created based on the operation data;
a material deterioration evaluation unit, implemented by the processing circuitry, which calculates a material deterioration quantity of a material forming the equipment, based on the operating state quantity and material data of the predetermined evaluation-target site of the equipment;
a risk evaluation unit, implemented by the processing circuitry, which calculates a cumulative damage quantity based on an accumulation of a creep damage quantity or a fatigue damage quantity in a unit time based on:
a damage evaluation formula giving at least one of the creep damage quantity and the fatigue damage quantity of the evaluation-target site, given based on the operating state quantity and the material deterioration quantity; and
the operating state quantity and variation information on varying stress or varying strain in the unit time in which the operating state quantity is considered constant,
the risk evaluation unit further determining at least one of the cumulative damage quantity of the material forming the equipment and failure risk, based on the cumulative damage quantity; and
a display which presents a recommended maintenance time of the equipment based on a result of a determination of the risk evaluation unit.