CN109543213A - A kind of simplification prediction technique of non-isothermal disc burst speed - Google Patents

A kind of simplification prediction technique of non-isothermal disc burst speed Download PDF

Info

Publication number
CN109543213A
CN109543213A CN201811177453.6A CN201811177453A CN109543213A CN 109543213 A CN109543213 A CN 109543213A CN 201811177453 A CN201811177453 A CN 201811177453A CN 109543213 A CN109543213 A CN 109543213A
Authority
CN
China
Prior art keywords
disc
temperature
finite element
wheel disc
burst speed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811177453.6A
Other languages
Chinese (zh)
Inventor
宋迎东
李林骏
胡绪腾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing University of Aeronautics and Astronautics
Original Assignee
Nanjing University of Aeronautics and Astronautics
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing University of Aeronautics and Astronautics filed Critical Nanjing University of Aeronautics and Astronautics
Priority to CN201811177453.6A priority Critical patent/CN109543213A/en
Publication of CN109543213A publication Critical patent/CN109543213A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/17—Mechanical parametric or variational design
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/04—Ageing analysis or optimisation against ageing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/08—Thermal analysis or thermal optimisation

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Geometry (AREA)
  • General Physics & Mathematics (AREA)
  • Evolutionary Computation (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Computational Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention discloses a kind of simplification prediction techniques of non-isothermal disk burst speed, obtain disc material Parameters of constitutive model under temperature b by test；Disc material attribute is defined in finite element；Establish wheel disc three-dimensional finite element model；Burst speed forecast analysis is carried out to wheel disc finite element model, obtains the burst speed for the equal Winchester disks that temperature is b, and find out the structural weak position that wheel disc is on large deformation instability status hour wheel plate convergence plate；Wheel disc three-dimensional finite element model is selected, core temperature a, the temperature boundary condition of disk outer rim temperature b are applied；Calculate Temperature Distribution cloud atlas；Read the temperature c at structural weak position at wheel disc disc；Disc material Parameters of constitutive model under temperature c is obtained by test；The material properties under temperature c are defined in finite element；Wheel disc three-dimensional finite element model is selected, calculates the disc burst speed under temperature c, the value, that is, non-isothermal disk burst speed.Present invention saves non-isothermal disc burst speed forecast costs, improve forecasting efficiency.

Description

A kind of simplification prediction technique of non-isothermal disc burst speed
Technical field
The invention belongs to method of testing materials technical field, in particular to a kind of simplification of non-isothermal disc burst speed is pre- Survey method.
Background technique
Important component of the wheel disc as aero-engine, and often in severe working environment, fracture failure is past Toward the failure for being non-inclusiveness, once occur, it will generate catastrophic effect.Domestic and international Aeroengine Design criterion is all to wheel Disk intensity (burst speed) performance is made that strict requirements and specification.
Therefore, the prediction technique of disc burst speed becomes important technology hand required for aero-engine Intensity Design Section.Domestic and foreign scholars are directed to disc burst speed prediction technique one after another and are studied as a result, but the research of this part all concentrates on To in the prediction of disc burst speed under room temperature, and aero-engine part wheel disc (such as turbine disk) is in actual work, often Under working environment in high temperature and there are temperature gradient, the disc burst speed prediction technique of previous scholars is in such condition Under it is all inadaptable, this is not that nobody wants to further investigate, but non-isothermal disk burst speed calculates excessive, the condition that occupies computing resource It is limited, so that rarely having dilettante.Therefore, it is very necessary for simplifying non-isothermal disk burst speed prediction technique.
The Chinese patent application of Publication No. CN106446367A discloses a kind of " based on arc-length methods nonlinear finite element point The disc burst speed prediction technique of analysis ".It is broken that application discloses a kind of wheel discs based on arc-length methods non linear finite element analysis Split rotor speed forecast method, step are as follows: sample to disc material, material constitutive model parameter is obtained by test；Using tradition side The burst speed of method approximate estimation wheel disc；The elasto-plastic Constitutive Model of wheel disc is defined in finite element software；Establish disc material Three-dimensional finite element model and carry out grid dividing；For calculative disk rotors finite element model, applies constraint and turn Fast load；The calculating of large deformation nonlinear finite element is carried out using arc-length methods；Turned in time preprocessor after the completion of calculating Speed or angular speed # wheel disc radial displacement curve, so that the limit critical speed of wheel disc or rotor, as burst speed can be obtained. The wheel disc that this application uses relatively more rationally based on arc-length methods non linear finite element analysis and global plastic instability ruptures quasi- Then, therefore the limit speed of wheel disc or rotor can more accurately be predicted.
To save non-isothermal disc burst speed forecast cost, forecasting efficiency is improved, the present invention is based on " non-based on arc-length methods Linear finite analysis disc burst speed prediction technique " in propose disc burst speed prediction technique, a kind of needle is provided To the more succinct of non-isothermal disk and have both the burst speed prediction technique of accuracy.
Summary of the invention
To save non-isothermal disc burst speed forecast cost, forecasting efficiency is improved, the object of the present invention is to provide one kind The simplification prediction technique of non-isothermal disc burst speed is more succinct and have both accuracy.
To achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of simplification prediction technique of non-isothermal disc burst speed, the broken core temperature of the non-isothermal wheel disc are a, outside disk Edge temperature is b；
It the described method comprises the following steps:
(1) disc material Parameters of constitutive model under temperature b is obtained by test；
(2) disc material attribute is defined in finite element, selects polyteny model；
(3) wheel disc three-dimensional finite element model, and grid division are established；
(4) burst speed forecast analysis is carried out to wheel disc finite element model, obtains the rupture turn for the equal Winchester disks that temperature is b Speed, and find out the structural weak position that wheel disc is on large deformation instability status hour wheel plate convergence plate；
(5) the wheel disc three-dimensional finite element model that optional step (3) obtains applies core temperature a, disk outer rim temperature b for it Temperature boundary condition；
(6) Temperature Distribution cloud atlas is calculated；
(7) from Temperature Distribution cloud atlas in reading step (4) from wheel disc disc structural weak position temperature c；
(8) disc material Parameters of constitutive model under temperature c is obtained by test；
(9) material properties under temperature c are defined in finite element；
(10) the wheel disc three-dimensional finite element model that optional step (3) obtains, calculates the disc burst speed under temperature c, The value simplifies the core temperature a that algorithm obtains, the non-isothermal disk burst speed of disk outer rim temperature b thus.
In the step (1), it is bent that engineering stress-strain of the material at temperature b is obtained by smooth specimen tension test Line (σE-εE), the curve before choosing highest point is converted into true stress-true strain curve (σ by following transformation for mulaT-εT)；
In above formula, σEIndicate engineering stress, εEIndicate engineering strain, σTIndicate trus stress, εTIndicate true strain；
True stress-true strain curve is further converted into trus stress-plastic strain curve (σ by following transformation for mulaT-εp)；
In above formula, εpIndicate plastic strain, E indicates that elasticity modulus, the elasticity modulus are obtained by the elastic slope over 10 tested ?；
The polyteny constitutive model of material is obtained by trus stress-plastic strain curve matching.
In the step (2), definition material attribute is the Elastic-plastic Constitutive for obtaining disc material test in finite element Model is defined into finite element program.
It is fan-shaped model by wheel disc model simplification due to wheel disc symmetry in the step (3).
In the step (3), when grid division, Local grid refinement is carried out for bolt hole, tongue-and-groove, fillet position.
In the step (4), wheel disc is under large deformation instability status, the maximum position of plastic strain at wheel disc disc, i.e., For wheel disc web pattern weak part.
The utility model has the advantages that method of the invention is capable of the rupture of prediction non-isothermal wheel disc that is more succinct and having both accuracy Revolving speed has saved non-isothermal disc burst speed forecast cost, has improved forecasting efficiency.
Detailed description of the invention
Fig. 1 is wheel disc finite element model and grid dividing schematic diagram；
Fig. 2 is the plastic strain cloud charts at 650 DEG C, under wheel disc large deformation instability status；
Fig. 3 is Temperature Distribution of the wheel disc under 350 DEG C of core, the temperature boundary condition that 650 DEG C of disk outer rim；
Fig. 4 is Temperature Distribution of the wheel disc under 350 DEG C of core, the temperature boundary condition that 600 DEG C of disk outer rim.
Specific embodiment
A kind of simplification prediction technique of non-isothermal disc burst speed of the invention, the broken core temperature of the non-isothermal wheel disc For a, disk outer rim temperature is b, method includes the following steps:
(1) disc material Parameters of constitutive model under temperature b is obtained by test；Specific steps are as follows:
Engineering stress-strain curve (σ of the material at temperature b is obtained by smooth specimen tension testE-εE), it chooses most Curve before high point is converted into true stress-true strain curve (σ by following transformation for mulaT-εT)；
In above formula, σEIndicate engineering stress, εEIndicate engineering strain, σTIndicate trus stress, εTIndicate true strain；
True stress-true strain curve is further converted into trus stress-plastic strain curve (σ by following transformation for mulaT-εp)；
In above formula, εpIndicate plastic strain, E indicates that elasticity modulus, the elasticity modulus are obtained by the elastic slope over 10 tested ?；
The polyteny constitutive model of material is obtained by trus stress-plastic strain curve matching；
(2) disc material attribute is defined in finite element, selects polyteny model；Definition material attribute is in finite element The elasto-plastic Constitutive Model that disc material test obtains is defined into finite element program, can refer to Publication No. The Chinese patent application " the disc burst speed prediction technique based on arc-length methods non linear finite element analysis " of CN106446367A, But polyteny model is selected at this time and does not have to be implanted into nonlinear model by secondary development；Finite element software has been inserted into polyteny mould Type can be selected directly；
(3) wheel disc three-dimensional finite element model, and grid division are established；Due to wheel disc symmetry, it is by wheel disc model simplification Grid dividing is carried out at fan-shaped model, and to the threedimensional model built up, for key positions such as bolt hole, tongue-and-groove, fillets It should carry out Local grid refinement；
(4) burst speed forecast analysis is carried out to wheel disc finite element model, obtains the rupture turn for the equal Winchester disks that temperature is b Speed, and find out the structural weak position that wheel disc is on large deformation instability status hour wheel plate convergence plate；Wheel disc is in large deformation unstability shape Under state, the maximum position of plastic strain at disc, as wheel disc web pattern weak part；
(5) the wheel disc three-dimensional finite element model that optional step (3) obtains applies core temperature a, disk outer rim temperature b for it Temperature boundary condition；
(6) Temperature Distribution cloud atlas is calculated；
(7) from Temperature Distribution cloud atlas in reading step (4) from wheel disc disc structural weak position temperature c；
(8) disc material Parameters of constitutive model under temperature c is obtained by test；
(9) material properties under temperature c are defined in finite element；
(10) the wheel disc three-dimensional finite element model that optional step (3) obtains, calculates the disc burst speed under temperature c, The value simplifies the core temperature a that algorithm obtains, the non-isothermal disk burst speed of disk outer rim temperature b thus.
Wherein, step (5), (6), in (7), only relate to temperature boundary condition, powerless load and displacement constraint.
Below in conjunction with the accompanying drawings and embodiment the invention will be further described.
Embodiment:
The present embodiment is non-to Classical forecast by taking the burst speed finite element predictions of non-isothermal finite element model disk as an example The simplification method that the method and the present invention of equal Winchester disks burst speed refer to is compared.Wheel disc finite element model is as shown in Figure 1. Disc material selects GH4169 nickel base superalloy.The simplification prediction technique of non-isothermal disc burst speed the following steps are included:
(1) 350 DEG C of core are predicted first, 650 DEG C of disk outer rim of non-isothermal disk burst speed, with stretching test measurement wheel disc Material model parameter at 650 DEG C, the Chinese patent application with reference to Publication No. CN106446367A are " non-thread based on arc-length methods Property finite element analysis disc burst speed prediction technique ", at this time material model select polyteny model.
(2) the polyteny material constitutive model at 650 DEG C of wheel disc is defined in FEM-software ANSYS.
(3) wheel disc is reduced to the fan-shaped wheel disc model of 1/12 size herein.
(4) arc-length methods non linear finite element analysis " is based on using the Chinese patent application of Publication No. CN106446367A Disc burst speed prediction technique " in disc burst speed prediction technique, carry out disc burst speed calculate analysis, calculate The burst speed of 650 DEG C of equal Winchester disks out, and find out wheel disc maximum area of plastic strain on disc under large deformation instability condition Domain, this region are weak part at wheel disc disc, as shown in Figure 2.
(5) example is separately created, applies 350 DEG C of core for wheel disc finite element model, 650 DEG C of disk outer rim of temperature boundary item Part.
(6) Temperature Distribution cloud atlas is calculated, as shown in Figure 3.
(7) in conjunction with the cloud atlas in step (5), (6), it can be seen that the temperature of wheel disc disc weakness is about 500 DEG C.
(8) the material model parameter with stretching test measurement wheel disc at 500 DEG C.
(9) the polyteny material constitutive model at 500 DEG C of wheel disc is defined in FEM-software ANSYS.
(10) arc-length methods non linear finite element analysis " is based on using the Chinese patent application of Publication No. CN106446367A Disc burst speed prediction technique " in disc burst speed prediction technique, carry out disc burst speed calculate analysis, calculate The burst speed of 500 DEG C of equal Winchester disks out, the value simplify 350 DEG C of core that algorithm obtains thus, 650 DEG C of disk outer rim non-etc. Winchester disk burst speed.
Similarly, it can thus simplify algorithm and predict 350 DEG C of core, 600 DEG C of disk outer rim of non-isothermal disk burst speed.It will be simple Calculated result and the comparison of conventional method prediction result for changing prediction technique are as shown in table 1 below:
1 Comparative result of table
Although the present invention has been described by way of example and in terms of the preferred embodiments, they be not it is for the purpose of limiting the invention, it is any ripe This those skilled in the art is practised, without departing from the spirit and scope of the invention, various change or retouching, therefore guarantor of the invention can be from working as Shield range should be subject to the scope of patent protection of the application and be defined.The not detailed description of the present invention is in routine techniques Hold.

Claims (6)

1. a kind of simplification prediction technique of non-isothermal disc burst speed, it is characterised in that: the broken core temperature of the non-isothermal wheel disc Degree is a, and disk outer rim temperature is b；
It the described method comprises the following steps:
(1) disc material Parameters of constitutive model under temperature b is obtained by test；
(2) disc material attribute is defined in finite element, selects polyteny model；
(3) wheel disc three-dimensional finite element model, and grid division are established；
(4) burst speed forecast analysis is carried out to wheel disc finite element model, obtains the burst speed for the equal Winchester disks that temperature is b, and Find out the structural weak position that wheel disc is on large deformation instability status hour wheel plate convergence plate；
(5) the wheel disc three-dimensional finite element model that optional step (3) obtains applies core temperature a, the temperature of disk outer rim temperature b for it Spend boundary condition；
(6) Temperature Distribution cloud atlas is calculated；
(7) from Temperature Distribution cloud atlas in reading step (4) from wheel disc disc structural weak position temperature c；
(8) disc material Parameters of constitutive model under temperature c is obtained by test；
(9) material properties under temperature c are defined in finite element；
(10) the wheel disc three-dimensional finite element model that optional step (3) obtains, calculates the disc burst speed under temperature c, the value Simplify the core temperature a that algorithm obtains, the non-isothermal disk burst speed of disk outer rim temperature b thus.
2. the simplification prediction technique of non-isothermal disc burst speed according to claim 1, it is characterised in that: the step (1) in, engineering stress-strain curve (σ of the material at temperature b is obtained by smooth specimen tension testE-εE), choose highest Curve before point, is converted into true stress-true strain curve (σ by following transformation for mulaT-εT)；
In above formula, σEIndicate engineering stress, εEIndicate engineering strain, σTIndicate trus stress, εTIndicate true strain；
True stress-true strain curve is further converted into trus stress-plastic strain curve (σ by following transformation for mulaT-εp)；
In above formula, εpIndicate plastic strain, E indicates that elasticity modulus, the elasticity modulus are obtained by the elastic slope over 10 tested；
The polyteny constitutive model of material is obtained by trus stress-plastic strain curve matching.
3. the simplification prediction technique of non-isothermal disc burst speed according to claim 1, it is characterised in that: the step (2) in, definition material attribute is that the elasto-plastic Constitutive Model for obtaining disc material test is defined into finite element in finite element In program.
4. the simplification prediction technique of non-isothermal disc burst speed according to claim 1, it is characterised in that: the step It (3) is fan-shaped model by wheel disc model simplification due to wheel disc symmetry in.
5. the simplification prediction technique of non-isothermal disc burst speed according to claim 1, it is characterised in that: the step (3) in, when grid division, Local grid refinement is carried out for bolt hole, tongue-and-groove, fillet position.
6. the simplification prediction technique of non-isothermal disc burst speed according to claim 1, it is characterised in that: the step (4) in, wheel disc is under large deformation instability status, the maximum position of plastic strain at wheel disc disc, and as wheel disc web pattern is thin Weak position.
CN201811177453.6A 2018-10-10 2018-10-10 A kind of simplification prediction technique of non-isothermal disc burst speed Pending CN109543213A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811177453.6A CN109543213A (en) 2018-10-10 2018-10-10 A kind of simplification prediction technique of non-isothermal disc burst speed

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811177453.6A CN109543213A (en) 2018-10-10 2018-10-10 A kind of simplification prediction technique of non-isothermal disc burst speed

Publications (1)

Publication Number Publication Date
CN109543213A true CN109543213A (en) 2019-03-29

Family

ID=65843620

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811177453.6A Pending CN109543213A (en) 2018-10-10 2018-10-10 A kind of simplification prediction technique of non-isothermal disc burst speed

Country Status (1)

Country Link
CN (1) CN109543213A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114330055A (en) * 2021-12-20 2022-04-12 南京航空航天大学 Disk-shaft integrated rotor rupture rotating speed prediction method based on rotor steady-state deformation assumption
CN114611370A (en) * 2022-05-11 2022-06-10 中国航发上海商用航空发动机制造有限责任公司 Method for predicting over-rotation rupture rotation speed and rupture mode of rotor and rotor configuration method
CN116052821A (en) * 2023-04-03 2023-05-02 中国航发四川燃气涡轮研究院 Wheel disc material utilization coefficient determination method based on temperature influence
CN116702566A (en) * 2023-08-03 2023-09-05 中国航发四川燃气涡轮研究院 Wheel disc fracture rotation speed determination method based on residual deformation
CN117556676A (en) * 2024-01-11 2024-02-13 中国航发四川燃气涡轮研究院 Double-radial-plate turbine disk fracture rotation speed prediction method based on two-dimensional finite element model

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106446367A (en) * 2016-09-09 2017-02-22 南京航空航天大学 Arc length method nonlinear finite element analysis-based disc burst speed prediction method
CN107229782A (en) * 2017-05-19 2017-10-03 北京航空航天大学 A kind of Demand-Oriented is based on geometric properties and drives wheeling disk structure Interactive Design method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106446367A (en) * 2016-09-09 2017-02-22 南京航空航天大学 Arc length method nonlinear finite element analysis-based disc burst speed prediction method
CN107229782A (en) * 2017-05-19 2017-10-03 北京航空航天大学 A kind of Demand-Oriented is based on geometric properties and drives wheeling disk structure Interactive Design method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
付德斌等: "旋转盘应力水平与温度分布的关联分析", 《航空动力学报》 *
古爱军等: "轴流式轮盘破裂转速的数值计算方法", 《航空动力学报》 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114330055A (en) * 2021-12-20 2022-04-12 南京航空航天大学 Disk-shaft integrated rotor rupture rotating speed prediction method based on rotor steady-state deformation assumption
CN114611370A (en) * 2022-05-11 2022-06-10 中国航发上海商用航空发动机制造有限责任公司 Method for predicting over-rotation rupture rotation speed and rupture mode of rotor and rotor configuration method
CN114611370B (en) * 2022-05-11 2022-11-01 中国航发上海商用航空发动机制造有限责任公司 Method for predicting rotor over-rotation rupture rotation speed and rupture mode and rotor configuration method
CN116052821A (en) * 2023-04-03 2023-05-02 中国航发四川燃气涡轮研究院 Wheel disc material utilization coefficient determination method based on temperature influence
CN116052821B (en) * 2023-04-03 2023-06-30 中国航发四川燃气涡轮研究院 Wheel disc material utilization coefficient determination method based on temperature influence
CN116702566A (en) * 2023-08-03 2023-09-05 中国航发四川燃气涡轮研究院 Wheel disc fracture rotation speed determination method based on residual deformation
CN116702566B (en) * 2023-08-03 2023-10-17 中国航发四川燃气涡轮研究院 Wheel disc fracture rotation speed determination method based on residual deformation
CN117556676A (en) * 2024-01-11 2024-02-13 中国航发四川燃气涡轮研究院 Double-radial-plate turbine disk fracture rotation speed prediction method based on two-dimensional finite element model
CN117556676B (en) * 2024-01-11 2024-03-19 中国航发四川燃气涡轮研究院 Double-radial-plate turbine disk fracture rotation speed prediction method based on two-dimensional finite element model

Similar Documents

Publication Publication Date Title
CN109543213A (en) A kind of simplification prediction technique of non-isothermal disc burst speed
Feiner et al. Mistuning identification of bladed disks using a fundamental mistuning model—part II: application
Chen et al. Prestall behavior of a transonic axial compressor stage via time-accurate numerical simulation
He et al. Concurrent blade aerodynamic-aero-elastic design optimization using adjoint method
Petrov et al. Forced response of mistuned bladed disks in gas flow: A comparative study of predictions and full-scale experimental results
CN106446367A (en) Arc length method nonlinear finite element analysis-based disc burst speed prediction method
Li et al. Mistuned higher-order mode forced response of an embedded compressor rotor—part II: Mistuned forced response prediction
Chan et al. The amplification of vibration response levels of mistuned bladed disks: its consequences and its distribution in specific situations
Fitzner et al. Nodal energy weighted transformation: A mistuning projection and its application to FLADE™ turbines
CN109063287A (en) A kind of centrifugal impeller centre bore crack propagation characteristic simulation part design method
Millecamps et al. Snecma’s viewpoint on the numerical and experimental simulation of blade-tip/casing unilateral contacts
Chen et al. Pre-stall behavior of a transonic axial compressor stage via time-accurate numerical simulation
Naik et al. Influence of turbocharger turbine blade geometry on vibratory blade stresses
Rice et al. Identification of the stability margin between safe operation and the onset of blade flutter
Haldeman et al. Influence of clocking and vane/blade spacing on the unsteady surface pressure loading for a modern stage and one-half transonic turbine
Nipkau et al. Aeromechanical design and test of a modern highly loaded fan
Bhachu et al. Application of 3D fracture mechanics for improved crack growth predictions of gas turbine components
Weber et al. Mistuning identification approach with focus on high-speed centrifugal compressors
CN110135006B (en) Method for judging damage of gas film hole of nickel-based single crystal turbine cooling blade
Ekici et al. Aerodynamic asymmetry analysis of unsteady flows in turbomachinery
Huang et al. System eigenvalue identification of mistuned bladed disks using least-squares complex frequency-domain method
Pohle et al. Dynamic behavior of a mistuned air turbine: comparison between simulations and measurements
Myhre et al. Numerical investigation of the sensitivity of forced response characteristics of bladed disks to mistuning
Zhao et al. The research on measurement and analysis method of gas turbine blade tip clearance based on empirical model
Wang et al. Mistuning identification for integrally bladed disks based on the SNM technique

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20190329

RJ01 Rejection of invention patent application after publication