CN118130098A - Method for obtaining vibration-torsion ratio of engine shaft parts - Google Patents
Method for obtaining vibration-torsion ratio of engine shaft parts Download PDFInfo
- Publication number
- CN118130098A CN118130098A CN202410572145.2A CN202410572145A CN118130098A CN 118130098 A CN118130098 A CN 118130098A CN 202410572145 A CN202410572145 A CN 202410572145A CN 118130098 A CN118130098 A CN 118130098A
- Authority
- CN
- China
- Prior art keywords
- vibration
- torque
- engine
- obtaining
- patch
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000012360 testing method Methods 0.000 claims abstract description 20
- 238000004458 analytical method Methods 0.000 claims abstract description 16
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 238000007405 data analysis Methods 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 238000004088 simulation Methods 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a method for obtaining the vibration-torque ratio of engine shaft parts, which comprises the following steps: step one, determining the position and the direction of the patch of the shaft part; step two, determining vibration torque frequency according to the shaft part patch; step three, obtaining measurement data of the shaft part patch under the test; step four, analyzing measurement data according to the vibration torque frequency; and fifthly, obtaining the vibration-torque ratio according to the analysis result of the measurement data. And obtaining the maximum vibration-torque ratio according to simulation and comparison analysis of the whole engine test, thereby obtaining the vibration-torque ratio of the shaft parts conforming to the characteristics of the engine, rapidly calculating high-cycle vibration torque according to the actual working condition of the engine, and supporting the strength fatigue analysis of the shaft parts of the engine.
Description
Technical Field
The invention relates to the technical field of aeroengines, in particular to a method for acquiring the vibration-torque ratio of engine shaft parts.
Background
The parts of the engine shaft are parts which play a supporting role on the rotor and are also important parts for transmitting torque (power) on the rotor. Due to various reasons such as unstable combustion, alternating high Zhou Zhendong torque is generated on the engine shaft parts. Generally, the engine has a high Zhou Zhendong torque amplitude and a high frequency, and the superposition of the vibration torque load on the high engine low-cycle steady-state load has a great influence on the fatigue life of the shaft. According to the design requirement of the engine, the shaft parts must meet the requirement of high Zhou Zhendong torque to reach infinite life.
In engineering, in the design of the fatigue strength of engine shaft parts, the high Zhou Zhendong torque is generally calculated according to the vibration-torque ratio (the ratio of high cycle vibration torque to low Zhou Wentai torque), and at present, the size of the high Zhou Zhendong torque is generally obtained according to the past use experience of an engine, and the high Zhou Zhendong torque is generally 5% of the low cycle steady-state torque (namely the vibration-torque ratio). However, at present, the aerodynamic characteristics of the engine, the gas combustion performance of the combustion chamber and the like are changed, and main parts of the engine such as a compressor, a combustion chamber, a turbine and the like adopt various new structures and new materials, so that the influencing factors for generating high Zhou Zhendong torque load are radically changed; meanwhile, the engine thrust-weight ratio demand change obviously improves the low Zhou Wentai torque load, and the proportional relation between the high Zhou Zhendong torque and the low Zhou Wentai torque is inevitably changed. Currently, at the engine design stage, a method for obtaining reliable vibration-torque ratio of engine shaft parts is lacking.
Term interpretation:
vibration-to-torque ratio: ratio of high cycle vibration torque to low Zhou Wentai torque.
Disclosure of Invention
In view of this, the embodiments of the present disclosure provide a method for obtaining the vibration-torque ratio of an engine shaft part, so as to solve the problem that the engine shaft part cannot obtain an accurate value with a high Zhou Zhendong torque.
The embodiment of the specification provides the following technical scheme: the method for obtaining the vibration-torque ratio of the engine shaft parts comprises the following steps:
step one, determining the position and the direction of the patch of the shaft part;
Step two, determining vibration torque frequency according to the shaft part patch;
step three, obtaining measurement data of the shaft part patch under the test;
step four, analyzing measurement data according to the vibration torque frequency;
and fifthly, obtaining the vibration-torque ratio according to the analysis result of the measurement data.
Further, the first step includes:
Establishing a finite element model according to the three-dimensional structure of the shaft part;
Calculating a single torque load The main stress on the lower shaft is distributed, and a plurality of paster positions are obtained according to the stress area larger than 150Mpa and the surface flatness of the position;
Carrying out circumferential surface mounting at the surface-mountable position, and enabling the direction of each surface mounting to form an included angle of 40-50 DEG with the axial direction of the engine;
obtaining torque load under the set patch position and direction according to the finite element model result Stress value/>, of lower corresponding patch position。
Further, the second step is specifically: establishing an engine rotor dynamics analysis model, determining a first-order high Zhou Zhendong torque rotating speed v according to a shaft part structure, and determining a first-order high Zhou Zhendong torque rotating speed v according to a formulaThe vibration torque frequency p is calculated.
Further, the third step is specifically: and carrying out a dynamic stress test of the whole engine, wherein the dynamic stress test at least comprises a state with the relative rotating speed of more than 70%, and acquiring measurement data of the axle type part patch under the test.
Further, the fourth step includes:
Comparing the vibration torque frequency p with the strain gauge peak value under the vibration torque frequency p which is 2 times, and selecting the vibration torque frequency p max with the maximum peak value for data analysis;
in the state stabilization stage, selecting data with maximum strain amplitude in the patch point position under the maximum vibration torque frequency p max of the peak value to obtain the strain value of the strain gauge at the moment ；
The low Zhou Wentai torque value of the engine in the stable state is obtained by combining the engine rotating speed, the section temperature and the pressure which are measured in the whole machine testAccording to the formula/>Obtaining the stable state principal stress value of the patch position at the stable state stage；
According to the formulaCalculating to obtain dynamic stress/>, at the strain patch pointWherein E is the elastic modulus of the shaft part material;
By the formula Calculating a vibration torsion value K;
and obtaining the maximum vibration torsion value K xx%max at the current patch position.
Further, the steps one to four are circulated, and the maximum vibration torsion value K max at all patch positions is obtained.
Compared with the prior art, the beneficial effects that above-mentioned at least one technical scheme that this description embodiment adopted can reach include at least: and obtaining the maximum vibration-torque ratio according to simulation and comparison analysis of the whole engine test, thereby obtaining the vibration-torque ratio of the shaft parts conforming to the characteristics of the engine, rapidly calculating high-cycle vibration torque according to the actual working condition of the engine, and supporting the strength fatigue analysis of the shaft parts of the engine.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of an embodiment of the present invention;
FIG. 2 is a schematic diagram of exemplary engine test history and analysis point selection in accordance with an embodiment of the present invention.
Detailed Description
Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1, the embodiment of the invention provides a method for obtaining the vibration-torque ratio of an engine shaft part, which specifically comprises the following steps:
(1) Determining the position and direction of the surface mount of the shaft part
According to the three-dimensional structure of the shaft part, a finite element model is established, the constraint state of an engine is simulated, the main stress distribution on the shaft under a single torque load is calculated, the surface flatness of a large stress area and each position is synthesized, and a plurality of possible patch positions are obtained; determining the patch positions and directions of the strain gauges according to the main stress directions of the positions, distributing the determined patch positions along the circumferential direction, and arranging patch points (not less than 8 patches) as much as possible; and simultaneously, under the torque load, the characteristic of 45 degrees (40-50) with the axial direction of the engine is presented according to the surface stress state of the shaft part, and the surface of the shaft part needs to be pasted along the direction. According to the finite element simulation result, the torque is obtained at the same timeStress value of lower patch position/>。
For example: the low pressure turbine shaft of an engine performs finite element calculations at XX N.m torque load. According to calculation, stress at three positions on the shaft is large, the surfaces of all the positions are flat, and the patch requirements can be met. And then analyzing the principal stress of each position, the stress at the position with the largest principal stress and the largest principal stress is in a single stress state at the position with the axial direction of 45 degrees. Therefore, the on-axis position C is determined to be a patch position, the patch direction is 45 degrees to the axis direction of the engine in a clinging radial direction Kong Bianju, and 1 strain gauge is arranged at each hole edge position, and the total number of the strain gauges is 8.
(2) Determining vibration torque frequency
And (3) establishing an engine rotor dynamics analysis model, determining a first-order high Zhou Zhendong torque rotating speed v (rpm) according to the shaft part structure, and calculating a vibration torque frequency p according to a formula (1).
……………………………………………(1)
(3) Obtaining shaft part patch measurement data under test
In order to obtain a more complete measurement result, the whole engine dynamic stress test is proposed to be carried out, wherein the whole engine test comprises as many engine states as possible and at least comprises states (at least 70, 80, 90 and 100 states) with relative rotation speed of more than 70%.
(4) Analysis of test data
1) Comparing the peak values of the strain gauges under the fundamental frequency and the frequency multiplication of the vibration torque, and selecting the vibration torque frequency (such as the fundamental frequency or the frequency multiplication of 2) with the maximum peak value for data analysis;
2) In order to reduce data errors and improve data analysis efficiency, according to the stable state of the whole engine test, a state with the relative rotation speed of more than 70% is selected for analysis, and in the stable state, the position with the largest strain amplitude in each patch point is selected, and at least 3 points are required to be selected for analysis. As shown in fig. 2, two temperature states of 78% relative rotation speed and 100% relative rotation speed are selected, and A, B, C three points are selected in 100% relative rotation speed.
3) After the stable state is selected, the low Zhou Wentai torque value under the stable state of the engine can be directly obtained by combining the engine rotating speed, the section temperature/pressure and the like measured in the whole machine test. And (3) obtaining steady-state principal stress values/>, of all the stable working condition patch positions by conversion according to the following (2)。
……………………………………………(2)
4) Obtaining the strain value of each strain gauge at the moment according to the selected pointAnd calculating the dynamic stress/>, at the strain patch point, according to the following formula (3) by using the elastic modulus E (MPa) of the shaft part materialThe alternating stress at this location at high Zhou Zhendong torque is obtained.
……………………………………………(3)
5) According to the steady state stress value obtained in 3)And 4) alternating stress values obtained inThe ratio of the high Zhou Zhendong torque alternating stress to the low Zhou Wentai torque steady state stress, which is also equal to the ratio of high Zhou Zhendong torque to low Zhou Wentai torque/>, can be calculated from the following formula (4)In short, the vibration-to-torque ratio. From the calculation results, the vibration torque values/>, at all patch points are listed in table 1 belowWherein the maximum torsional vibration ratio is/>。
……………………………………………(4)
TABLE 1 analysis results of high Zhou Zhendong torque of shaft parts at XX% rotational speed
(5) Obtaining the vibration-torque ratio
According to the method in 3), 4) and 5), all stable states with the relative rotation speed above 70% are analyzed to obtain all vibration torsion values {、/>…/>Maximum vibration torque value/>The vibration torque amplitude ratio of the engine is obtained. In the fatigue analysis of the strength of the engine shaft parts, a reliable high Zhou Zhendong torque load can be determined based on the obtained vibration-to-torque ratio and the actual steady state.
The foregoing description of the embodiments of the invention is not intended to limit the scope of the invention, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the invention shall fall within the scope of the patent. In addition, the technical characteristics and technical scheme, technical characteristics and technical scheme can be freely combined for use.
Claims (6)
1. The method for obtaining the vibration-torque ratio of the engine shaft parts is characterized by comprising the following steps of:
step one, determining the position and the direction of the patch of the shaft part;
Step two, determining vibration torque frequency according to the shaft part patch;
Step three, obtaining measurement data of the shaft part patch under test;
Analyzing the measurement data according to the vibration torque frequency;
and fifthly, obtaining the vibration-torque ratio according to the analysis result of the measurement data.
2. The method for obtaining the vibration-to-torque ratio of the engine shaft-like parts according to claim 1, wherein the step one includes:
Establishing a finite element model according to the three-dimensional structure of the shaft part;
Calculating a single torque load The main stress on the lower shaft is distributed, and a plurality of paster positions are obtained according to the stress area larger than 150Mpa and the surface flatness of the position;
Carrying out circumferential surface mounting at the surface-mountable position, and enabling the direction of each surface mounting to form an included angle of 40-50 DEG with the axial direction of the engine;
obtaining torque load under the set patch position and direction according to the finite element model result Stress value/>, of lower corresponding patch position。
3. The method for obtaining the vibration-to-torque ratio of the engine shaft parts according to claim 2, wherein the step two is specifically: establishing an engine rotor dynamics analysis model, determining a first-order high Zhou Zhendong torque rotating speed v according to a shaft part structure, and determining a first-order high Zhou Zhendong torque rotating speed v according to a formulaThe vibration torque frequency p is calculated.
4. The method for obtaining the vibration-torque ratio of the engine shaft parts according to claim 3, wherein the third step is specifically: and carrying out a dynamic stress test of the whole engine, wherein the dynamic stress test at least comprises a state with the relative rotating speed of more than 70%, and acquiring measurement data of the shaft part patch under the test.
5. The method for obtaining the vibration-to-torque ratio of the engine shaft-like component according to claim 4, wherein the fourth step comprises:
Comparing the vibration torque frequency p with the strain gauge peak value under the vibration torque frequency p which is 2 times, and selecting the vibration torque frequency p max with the maximum peak value for data analysis;
in the state stabilization stage, selecting data with maximum strain amplitude in the patch point position under the maximum vibration torque frequency p max of the peak value to obtain the strain value of the strain gauge at the moment ；
The low Zhou Wentai torque value of the engine in the stable state is obtained by combining the engine rotating speed, the section temperature and the pressure which are measured in the whole machine testAccording to the formula/>Obtaining the steady-state principal stress value/>, of the patch position at the steady-state stage；
According to the formulaCalculating to obtain dynamic stress/>, at the strain patch pointWherein E is the elastic modulus of the shaft part material;
By the formula Calculating a vibration torsion value K;
and obtaining the maximum vibration torsion value K xx%max at the current patch position.
6. The method for obtaining the vibration/torque ratio of engine shaft parts according to claim 5, wherein the steps one to four are circulated to obtain the maximum vibration/torque value K max at all the patch positions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410572145.2A CN118130098B (en) | 2024-05-10 | 2024-05-10 | Method for obtaining vibration-torsion ratio of engine shaft parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410572145.2A CN118130098B (en) | 2024-05-10 | 2024-05-10 | Method for obtaining vibration-torsion ratio of engine shaft parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118130098A true CN118130098A (en) | 2024-06-04 |
| CN118130098B CN118130098B (en) | 2024-07-16 |
Family
ID=91244497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410572145.2A Active CN118130098B (en) | 2024-05-10 | 2024-05-10 | Method for obtaining vibration-torsion ratio of engine shaft parts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118130098B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101368874A (en) * | 2008-09-26 | 2009-02-18 | 成都发动机（集团）有限公司 | Testing device for implementing main torque and vibrating torque to high speed rotary main shaft |
| US20100250150A1 (en) * | 2007-12-04 | 2010-09-30 | Xinyan Liang | Method for measuring shafting mechanical fatigue of turbine generator set |
| JP2012112787A (en) * | 2010-11-24 | 2012-06-14 | Toshiba Corp | Apparatus, method and program for evaluating fatigue life of equipment |
| CN103076246A (en) * | 2013-01-06 | 2013-05-01 | 北京航空航天大学 | Double-shaft high-low cycle complex fatigue tester |
| CN106989922A (en) * | 2017-05-16 | 2017-07-28 | 上海明华电力技术工程有限公司 | Shafting Safety Analysis Method during a kind of motor frequency conversion operation |
| CN108414221A (en) * | 2018-03-02 | 2018-08-17 | 重庆理工大学 | A kind of fluid torque-converter end cap torsional fatigue strength test method |
| CN109520717A (en) * | 2018-12-20 | 2019-03-26 | 中国航发四川燃气涡轮研究院 | A kind of engine spindle Fatigue Testing Loads determine method |
| CN109885920A (en) * | 2019-02-13 | 2019-06-14 | 西安电子科技大学 | A kind of High-Low Cycle ComplexFatigue Life of 45 prediction technique of aero engine turbine blades |
| CN115017620A (en) * | 2022-06-16 | 2022-09-06 | 上海工程技术大学 | Nonlinear high-low cycle composite fatigue life prediction method and device and storage medium |
| CN116305542A (en) * | 2023-02-24 | 2023-06-23 | 中国航发四川燃气涡轮研究院 | Engine blade multi-order dynamic stress measurement design method based on strain gauge |
| WO2023151233A1 (en) * | 2022-02-09 | 2023-08-17 | 南京航空航天大学 | Virtual strain energy-based metal material multi-axis fatigue life prediction method and system |
| CN116720278A (en) * | 2023-06-19 | 2023-09-08 | 上海工程技术大学 | Composite loading fatigue life prediction method and device and readable storage medium |
| CN117725802A (en) * | 2024-02-07 | 2024-03-19 | 中国航发四川燃气涡轮研究院 | Method and system for constructing standard cyclic load spectrum of main shaft fatigue test of aero-engine |
-
2024
- 2024-05-10 CN CN202410572145.2A patent/CN118130098B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100250150A1 (en) * | 2007-12-04 | 2010-09-30 | Xinyan Liang | Method for measuring shafting mechanical fatigue of turbine generator set |
| CN101368874A (en) * | 2008-09-26 | 2009-02-18 | 成都发动机（集团）有限公司 | Testing device for implementing main torque and vibrating torque to high speed rotary main shaft |
| JP2012112787A (en) * | 2010-11-24 | 2012-06-14 | Toshiba Corp | Apparatus, method and program for evaluating fatigue life of equipment |
| CN103076246A (en) * | 2013-01-06 | 2013-05-01 | 北京航空航天大学 | Double-shaft high-low cycle complex fatigue tester |
| CN106989922A (en) * | 2017-05-16 | 2017-07-28 | 上海明华电力技术工程有限公司 | Shafting Safety Analysis Method during a kind of motor frequency conversion operation |
| CN108414221A (en) * | 2018-03-02 | 2018-08-17 | 重庆理工大学 | A kind of fluid torque-converter end cap torsional fatigue strength test method |
| CN109520717A (en) * | 2018-12-20 | 2019-03-26 | 中国航发四川燃气涡轮研究院 | A kind of engine spindle Fatigue Testing Loads determine method |
| CN109885920A (en) * | 2019-02-13 | 2019-06-14 | 西安电子科技大学 | A kind of High-Low Cycle ComplexFatigue Life of 45 prediction technique of aero engine turbine blades |
| WO2023151233A1 (en) * | 2022-02-09 | 2023-08-17 | 南京航空航天大学 | Virtual strain energy-based metal material multi-axis fatigue life prediction method and system |
| CN115017620A (en) * | 2022-06-16 | 2022-09-06 | 上海工程技术大学 | Nonlinear high-low cycle composite fatigue life prediction method and device and storage medium |
| CN116305542A (en) * | 2023-02-24 | 2023-06-23 | 中国航发四川燃气涡轮研究院 | Engine blade multi-order dynamic stress measurement design method based on strain gauge |
| CN116720278A (en) * | 2023-06-19 | 2023-09-08 | 上海工程技术大学 | Composite loading fatigue life prediction method and device and readable storage medium |
| CN117725802A (en) * | 2024-02-07 | 2024-03-19 | 中国航发四川燃气涡轮研究院 | Method and system for constructing standard cyclic load spectrum of main shaft fatigue test of aero-engine |
Non-Patent Citations (4)
| Title |
|---|
| 柏松: "航空发动机涡轮轴高低周复合疲劳寿命预测方法", 中国博士学位论文全文数据库 工程科技Ⅱ辑, 15 February 2024 (2024-02-15) * |
| 赵振华;陈伟;: "高低周复合载荷对TC11钛合金疲劳性能的影响", 航空动力学报, no. 11, 15 November 2011 (2011-11-15) * |
| 陆山;陈倩;陈军;: "航空发动机主轴疲劳寿命预测方法", 航空动力学报, no. 01, 15 January 2010 (2010-01-15) * |
| 饶云松: "低压涡轮轴改进疲劳设计方法与试验验证", 航空动力学报, 25 October 2023 (2023-10-25) * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN118130098B (en) | 2024-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111475903B (en) | Multistage part dynamic characteristic step-by-step measuring and distributing method for large-scale high-speed rotary equipment based on multi-bias error synchronous compensation | |
| Tsai | Rotating vibration behavior of the turbine blades with different groups of blades | |
| CN111382544B (en) | Method for testing accelerated life of compressor blade based on equivalent fatigue life | |
| JPH0375538A (en) | Method of balancing rotor | |
| US20170254715A1 (en) | Rotor balancing | |
| CN115114721B (en) | Blade multi-mode maximum stress prediction method and system based on non-contact measurement | |
| CN110259637A (en) | Blade aerodynamic imbalance antidote, device and the equipment of wind power generating set | |
| CN110399628A (en) | Consider that the level pressure that vibration influences pre-tightens angular contact bearing rigidity data calibration method | |
| CN115859536B (en) | Method for simulating asynchronous vibration frequency locking value of rotor blade of air compressor | |
| CN117725802B (en) | Method and system for constructing standard cyclic load spectrum of main shaft fatigue test of aero-engine | |
| CN111563342B (en) | Strain gauge measuring point layout optimization method for rotor blade | |
| CN104536475A (en) | Method for adjusting the critical speed of high-speed combined rotor of micro turbojet engine | |
| CN118130098B (en) | Method for obtaining vibration-torsion ratio of engine shaft parts | |
| CN109520717B (en) | Method for determining fatigue test load of engine spindle | |
| CN113190786B (en) | Vibration prediction method for large-scale rotating equipment by utilizing multidimensional assembly parameters | |
| US20020074102A1 (en) | Method using secondary orientation to tune bucket natural frequency | |
| CN106503375B (en) | Based on CNMethod and system for determining critical rotating speed of steam turbine rotor by group theory | |
| CN110220688B (en) | Fatigue testing method for wind driven generator blade | |
| CN111982402B (en) | Aircraft engine rotor part matching optimization method considering initial unbalance amount | |
| CN116127654B (en) | Design method of damper simulation tester with elastic ring type extrusion oil film | |
| CN107563041A (en) | A kind of big part static strength fast evaluation method of Wind turbines | |
| CN104657543B (en) | A kind of selection method of wind turbine gearbox resilient support | |
| Şakar et al. | Buckling and dynamic stability of a rotating pretwisted asymmetric cross-section blade subjected to an axial periodic force | |
| CN110750932A (en) | Digital simulation method for rub-impact dynamic characteristics of blade disc-casing system | |
| CN110672269A (en) | Dynamic balance method and system of engine rotor considering squeeze film damper |
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 | ||
| GR01 | Patent grant |