TECHNICAL FIELD
[0001] The present disclosure relates to a rotating machinery evaluation device, a rotating
machinery evaluation system, a tuning method for a rotating machinery evaluation device, and
10 a rotating machinery evaluation method.
The present application claims priority based on Japanese Patent Application No. 2021-
029114 filed on February 25, 2021, the entire content of which is incorporated herein by
reference.
15 BACKGROUND ART
[0002] Rotating machinery such as a turbine that handles a hot fluid such as steam or gas
generates thermal stress in its interior. Such thermal stress can cause damage to components
of the rotating machinery and affect the service life. Therefore, thermal stress and damage are
useful as evaluation values for evaluating the life of rotating machinery, and it is necessary to
20 pay attention to them as monitoring items in the operation of rotating machinery.
[0003] As one method for obtaining such evaluation values, for example, in rotating
machinery provided with a rotor (rotating member) that can be rotated by a hot fluid and a
casing (stationary member) that rotatably supports the rotor, a measurement result of a
temperature sensor installed in the casing is input as a surface temperature condition for a radial
25 one-dimensional heat transfer/structural rotor model prepared in advance to obtain the
temperature or thermal stress inside the rotor. As an alternative method, the finite element
method (FEM) may be used to evaluate the temperature or stress of the rotor using operating
data and various measurement data of rotating machinery as analysis conditions (see Patent
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Document 1).
Citation List
Patent Literature
5 [0004] Patent Document 1: JP2002-277382A
SUMMARY
Problems to be Solved
[0005] In the method for calculating evaluation values using the heat transfer/structural
10 rotor model, the evaluation values can only be calculated near the temperature sensor (i.e., at
the same position in the axial direction as the temperature sensor) because the model is a onedimensional model in the radial direction, and this method is less accurate than the method
using the finite element method. Meanwhile, the method using the finite element method has
better evaluation accuracy than the method using heat transfer/structural rotor model, but it
15 needs a large computational load. Therefore, it is difficult to apply these methods to real-time
monitoring of evaluation values in rotating machinery under operation.
[0006] At least one embodiment of the present embodiments is made in view of the above
circumstances, and an object thereof is to provide a rotating machinery evaluation device, a
rotating machinery evaluation system, a tuning method for a rotating machinery evaluation
20 device, and a rotating machinery evaluation method whereby it is possible to monitor an
evaluation value during operation of rotating machinery accurately in real time.
Solution to the Problems
[0007] In order to solve the above problems, a rotating machinery evaluation device
25 according to at least one embodiment of the present embodiments includes: a boundary
condition calculation unit for calculating a boundary condition based on a measured value of a
parameter related to an operating state of rotating machinery; a storage unit forstoring a reduced
order model created based on a prediction model constructed so as to include a heat transfer
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model and a structural model of the rotating machinery for predicting an evaluation value of
the rotating machinery corresponding to the boundary condition; and an evaluation value
calculation unit for calculating the evaluation value corresponding to the boundary condition
calculated by the boundary condition calculation unit, based on the reduced order model, during
5 operation of the rotating machinery.
[0008] In order to solve the above problems, a rotating machinery evaluation device tuning
method according to at least one embodiment of the present embodiments includes: a step of
calculating a boundary condition based on a measured value of a parameter related to an
operating state of rotating machinery; and a step of calculating an evaluation value
10 corresponding to the calculated boundary condition, based on a reduced order model, during
operation of the rotating machinery. The reduced order model is created based on a prediction
model constructed so as to include a heat transfer model and a structural model of the rotating
machinery for predicting an evaluation value of the rotating machinery corresponding to the
boundary condition.

we claim:

1. A rotating machinery evaluation device, comprising:
a boundary condition calculation unit for calculating a boundary condition based on a
5 measured value of a parameter related to an operating state of rotating machinery;
a storage unit for storing a reduced order model created based on a prediction model
constructed so as to include a heat transfer model and a structural model of the rotating
machinery for predicting an evaluation value of the rotating machinery corresponding to the
boundary condition; and
10 an evaluation value calculation unit for calculating the evaluation value corresponding to
the boundary condition calculated by the boundary condition calculation unit, based on the
reduced order model, during operation of the rotating machinery.
2. The rotating machinery evaluation device according to claim 1,
15 wherein the reduced order model is created by reducing integration points in an integral
equation included in the prediction model.
3. The rotating machinery evaluation device according to claim 1 or 2,
wherein the prediction model includes a heat transfer equation, a deformation constitutive
20 equation, a force balance equation, and a damage evolution equation, and
wherein the reduced order model is created by POD Galerkin projection of at least one
term included in the heat transfer equation or the force balance equation of the prediction model.
4. The rotating machinery evaluation device according to any one of claims 1 to 3,
25 wherein the evaluation value includes stress occurring in the rotating machinery or
damage to the rotating machinery calculated based on the stress.
5. The rotating machinery evaluation device according to any one of claims 1 to 4, further
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comprising a parameter adjustment unit for adjusting a parameter included in the heat transfer
model so that a predicted value of a structural index of the rotating machinery calculated by
applying the measured value of the parameter to the heat transfer model coincides with an actual
value of the structural index.
5
6. The rotating machinery evaluation device according to claim 5,
wherein the structural index is an elongation amount along an axial direction of a rotating
member of the rotating machinery.
10 7. The rotating machinery evaluation device according to claim 5 or 6,
wherein the parameter adjustment unit is configured to adjust a parameter related to a heat
transfer coefficient selected according to an operating mode of the rotating machinery.
8. A rotating machinery evaluation device tuning method for tuning the rotating machinery
15 evaluation device according to any one of claims 1 to 4, comprising
adjusting a parameter included in the heat transfer model so that a predicted value of a
structural index of the rotating machinery calculated by applying the measured value of the
parameter to the heat transfer model coincides with an actual value of the structural index.
20 9. The rotating machinery evaluation device tuning method according to claim 8,
wherein the structural index is an elongation amount along an axial direction of a rotating
member of the rotating machinery.
10. The rotating machinery evaluation device tuning method according to claim 8 or 9,
25 comprising
adjusting a parameter related to a heat transfer coefficient selected according to an
operating mode of the rotating machinery.
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11. A rotating machinery evaluation method, comprising:
a step of calculating a boundary condition based on a measured value of a parameter
related to an operating state of rotating machinery; and
a step of calculating an evaluation value corresponding to the calculated boundary
5 condition, based on a reduced order model, during operation of the rotating machinery,
wherein the reduced order model is created based on a prediction model constructed so as
to include a heat transfer model and a structural model of the rotating machinery for predicting
an evaluation value of the rotating machinery corresponding to the boundary condition.
10 12. A rotating machinery evaluation system, comprising:
a client terminal device; and
a rotating machinery evaluation device capable of communicating with the client terminal
device,
wherein the client terminal device includes
15 a request means for requesting evaluation of rotating machinery to the rotating
machinery evaluation device, and
wherein the rotating machinery evaluation device includes:
a boundary condition calculation unit for calculating a boundary condition based on
a measured value of a parameter related to an operating state of the rotating machinery in
20 response to request from the request means;
a storage unit for storing a reduced order model created based on a prediction model
constructed so as to include a heat transfer model and a structural model of the rotating
machinery for predicting an evaluation value of the rotating machinery corresponding to the
boundary condition; and
25 an evaluation value calculation unit for calculating the evaluation value
corresponding to the boundary condition calculated by the boundary condition calculation unit,
based on the reduced order model, during operation of the rotating machinery.