CN107563041B - Rapid assessment method for static strength of large part of wind turbine generator - Google Patents
Rapid assessment method for static strength of large part of wind turbine generator Download PDFInfo
- Publication number
- CN107563041B CN107563041B CN201710757277.2A CN201710757277A CN107563041B CN 107563041 B CN107563041 B CN 107563041B CN 201710757277 A CN201710757277 A CN 201710757277A CN 107563041 B CN107563041 B CN 107563041B
- Authority
- CN
- China
- Prior art keywords
- stress
- static strength
- wind turbine
- large part
- turbine generator
- 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.)
- Active
Links
Images
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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention discloses a method for quickly evaluating the static strength of a large component of a wind turbine generator, which comprises the steps of establishing a strength analysis database containing the corresponding relation between each stress component and load component of a key node of the large component; based on the strength analysis database, the method of stress component interpolation and equivalent stress synthesis is adopted to carry out rapid evaluation on the static strength of the large part; and comparing the results of the rapid evaluation method and the finite element method, calculating to obtain an error value of the evaluation result, synthesizing the stress component difference value and the equivalent stress, and correcting the error value to obtain the static strength evaluation method. On the basis of ensuring the accuracy of the static strength result of the large part, the invention can effectively avoid repeated analysis work and greatly shorten the time for analyzing the static strength of the large part of the wind turbine generator.
Description
Technical Field
The invention relates to a method for rapidly evaluating the static strength of a large part of a wind turbine generator.
Background
In recent years, the wind power industry has been rapidly developed under the impetus of wind power policies and relevant laws and regulations of various countries in the world. The analysis and calculation of the strength of the wind turbine generator is taken as a core link in the research and development and manufacturing processes of the wind turbine generator and has been always emphasized by wind turbine generator manufacturers, colleges and universities and research institutions.
For wind turbine generator manufacturers, along with the continuous perfection of product serialization, the continuous increase of the number of newly-built wind farms, different wind resource conditions of the encountered wind farms, obvious machine position load differentiation and the need of carrying out a large amount of strength evaluation work.
The workload of analyzing the static strength of the large part of the wind turbine is very huge, and a great deal of time is needed to check the static strength of the large part of the wind turbine in an unknown wind field each time. If the fan large component strength analysis database based on the machine type carries out stress component interpolation and equivalent stress synthesis, the static strength stress result of the large component under a specific wind field and a machine position is quickly obtained, repeated analysis of the large component of the wind turbine can be effectively avoided, and the time for analyzing the static strength of the large component of the wind turbine is greatly shortened.
Disclosure of Invention
The invention provides a method for rapidly evaluating the static strength of a large part of a wind turbine generator system, aiming at solving the problems.
For further better illustration, the major components of the present invention are the hub, the main shaft, the main frame and the bearing housing.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for rapidly evaluating the static strength of a large part of a wind turbine generator comprises the following steps:
(1) establishing a strength analysis database containing the corresponding relation between each stress component and the load component of the key nodes of the large component;
(2) based on the strength analysis database, the method of stress component interpolation and equivalent stress synthesis is adopted to carry out rapid evaluation on the static strength of the large part;
(3) and comparing the results of the rapid evaluation method and the finite element method, calculating to obtain an error value of the evaluation result, synthesizing the stress component interpolation and the equivalent stress, and correcting the error value to obtain the static strength evaluation method.
In the step (1), a typical wind turbine model is selected, and a limit working condition load table of the load designed by the wind turbine is obtained.
In the step (1), the minimum value and the maximum value of each load component are set according to the limit working condition load table, the minimum value and the maximum value need to envelop the values in the limit load table, a loading working condition table is constructed, and the load is divided into a plurality of grades to be loaded in sequence.
In the step (1), target nodes are selected according to the static strength finite element calculation result under the ultimate load, and the nodes are uniformly distributed in the area where the surface stress value of the main shaft is larger than the set value.
In the step (1), each stress component of the target node under each loading condition is calculated by using the constructed static strength finite element model, so as to obtain the corresponding relation between each node stress component and each load component, and form a strength analysis database.
In the step (2), according to the strength analysis database, certain target node stress components corresponding to the corresponding load components in the working condition are obtained through linear interpolation, the target node stress components in the working condition are added to obtain a resultant force of the target node stress components, and the equivalent stress of the target node is obtained through synthesis by using a Von semiconductors stress formula.
In the step (3), the maximum error between the synthesized stress and the calculated stress is used as an error value.
In the step (3), an error value of the rapid evaluation method is obtained through comparative analysis of the finite element analysis result and the rapid evaluation result, and the error value is taken into consideration when the static strength of the large part is rapidly evaluated.
The stress components included 6 in total.
Compared with the prior art, the invention has the beneficial effects that:
1) according to the method, a proper static strength rapid evaluation method is formed by combining methods such as finite element analysis and linear interpolation, the problem that the calculation speed of the static strength of the large part of the wind turbine generator is low can be solved, the static strength of the large part of the wind turbine generator is rapidly evaluated by the method, and the rapid response of the model selection and the micro site selection of the wind turbine generator is realized, so that the market bidding work is rapidly responded, and the overall efficiency is improved;
2) the method can quickly realize the machine position-by-machine position analysis, quickly realize the differentiation and the optimized design of the machine set, and make up for the defect that the conventional analysis method has lower speed;
3) the process, the data and the systematization of the large-part static strength analysis process are realized, the possibility of sustainability optimization is realized, and the competitiveness of the early-stage technical support of the wind power plant is enhanced;
4) the method for rapidly evaluating the static strength of the large part of the wind turbine generator set can rapidly obtain the stress condition of the designated node of the large part, and achieves 'refinement' of strength analysis.
5) The method for rapidly evaluating the static strength of the large part of the wind turbine generator set introduces error control conditions, and enhances the reliability of the method.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic diagram of a method for rapidly evaluating the static strength of a large part of a wind turbine generator set;
FIG. 2 is a schematic diagram of a dynamic hub load calculation coordinate system used in the static strength analysis of the wind turbine generator of the present invention;
the specific implementation mode is as follows:
the invention is further described with reference to the following figures and examples.
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As introduced in the background art, the workload of static strength analysis of large parts of a wind turbine generator set is very huge in the prior art, and if the defect that a large amount of time is needed for static strength verification of the large parts of the wind turbine generator set in an unknown wind field each time is overcome, in order to solve the technical problem, the invention provides the method for rapidly evaluating the static strength of the large parts of the wind turbine generator set, which can effectively avoid repeated analysis on the basis of ensuring the accuracy of the static strength result of the large parts, and greatly shorten the time for analyzing the static strength of the large parts of the wind turbine generator set
The invention forms a proper static strength rapid evaluation method by depending on finite element analysis results of a large number of large wind turbine generator components and combining a finite element analysis method and a linear interpolation method.
The method for rapidly evaluating the static strength of the large part is described by taking a main shaft as an example, the minimum value and the maximum value of 6 load components are set according to a limit working condition load table (shown in table 1) of the unit design load, and the minimum value and the maximum value are respectively recorded as Mxmin, Mxmax, Mymin … … and the like by including the value envelope in the limit load table.
TABLE 1 hub center rotation coordinate System Limit load
And setting a loading working condition table, as shown in table 2, dividing extreme values such as Mxmin, Mxmax, Mymin … … and the like into 8 steps to be sequentially loaded, wherein the loads from 1 to 8 working conditions are Mxmin and Mxmin 7/8 … … Mxmin 1/8 respectively, and the loads from 9 to 16 working conditions are Mxmax 1/8 and Mxmax 2/8 … … Mxmax respectively until working conditions 96.
TABLE 2 Loading Condition Table
And selecting target nodes according to the static strength finite element calculation result under the extreme load, wherein the nodes are uniformly distributed in the area with the larger surface stress value of the main shaft.
Using the same finite element model, 96 operating conditions in table 2 were calculated.
Six stress components Sx, Sy, Sz, Sxy, Syz and Sxz of the target node under 96 loading conditions are extracted to obtain the corresponding relation between the stress components of 6 nodes and each load component, and a strength analysis database is formed. As shown in tables 3 and 4, where "Mx" and "My" are names of load components, "1" is a serial number in the destination node, "331072" is a node number, and the third row and below in the second column are corresponding load values.
TABLE 36 corresponding tables of stress components with Mx (units kNm, Mpa)
| Mx | 1 | ||||||
| 331072 | Sx | Sy | Sz | Sxy | Syz | Sxz | |
| -2200 | -0.262 | -0.107 | -0.14 | 0.098 | 4.822 | -101.749 | |
| -1925 | -0.201 | -0.082 | -0.107 | 0.075 | 4.22 | -89.03 | |
| -1650 | -0.147 | -0.06 | -0.079 | 0.055 | 3.617 | -76.312 | |
| -1375 | -0.102 | -0.042 | -0.055 | 0.038 | 3.014 | -63.593 | |
| -1100 | -0.066 | -0.027 | -0.035 | 0.024 | 2.411 | -50.874 | |
| -825 | -0.037 | -0.015 | -0.02 | 0.014 | 1.808 | -38.156 | |
| -550 | -0.016 | -0.007 | -0.009 | 0.006 | 1.206 | -25.437 | |
| -275 | -0.004 | -0.002 | -0.002 | 0.002 | 0.603 | -12.719 | |
| 400 | -0.009 | -0.004 | -0.005 | 0.003 | -0.877 | 18.5 | |
| 800 | -0.035 | -0.014 | -0.018 | 0.013 | -1.754 | 37 | |
| 1200 | -0.078 | -0.032 | -0.042 | 0.029 | -2.63 | 55.499 | |
| 1600 | -0.139 | -0.057 | -0.074 | 0.052 | -3.507 | 73.999 | |
| 2000 | -0.217 | -0.089 | -0.115 | 0.081 | -4.384 | 92.499 | |
| 2400 | -0.312 | -0.128 | -0.166 | 0.116 | -5.261 | 110.999 | |
| 2800 | -0.424 | -0.174 | -0.226 | 0.158 | -6.138 | 129.498 | |
| 3200 | -0.554 | -0.227 | -0.295 | 0.206 | -7.015 | 147.998 |
TABLE 46 correspondence tables of stress components and My (in kNm, Mpa)
For 6 loads Mx, My, Mz, Fx, Fy and Fz of a certain limit working condition, obtaining a stress component Sx of a certain target node corresponding to Mx in the working condition through linear interpolation according to the strength analysis database-Mx、Sy-Mx、Sz-Mx、Sxy-Mx、Syz-Mx、Sxz-MxObtaining the stress components of the target nodes corresponding to other 5 loads in the same way, and adding the stress components to obtain the stress component combination of the target nodes in the working conditionForce, namely:
Sx＝Sx-Mx +Sx-My +Sx-Mz +Sx-Fx +Sx-Fx +Sx-Fx
Sy＝Sy-Mx +Sy-My +Sy-Mz +Sy-Fx +Sy-Fx +Sy-Fx
Sz＝Sz-Mx +Sz-My +Sz-Mz +Sz-Fx +Sz-Fx +Sz-Fx
Sxy＝Sxy-Mx +Sxy-My +Sxy-Mz +Sxy-Fx +Sxy-Fx +Sxy-Fx
Syz＝Syz-Mx +Syz-My +Syz-Mz +Syz-Fx +Syz-Fx +Syz-Fx
Sxz＝Sxz-Mx +Sxz-My +Sxz-Mz +Sxz-Fx +Sxz-Fx +Sxz-Fx
and synthesizing the equivalent stress of the target node through a Von mises stress formula.
Table 5 is a comparison table of the synthetic stress and the calculated stress of the main shaft, and only results of 8 target nodes and four extreme load conditions are selected for comparative analysis, where the synthetic stress refers to an equivalent stress obtained by a rapid evaluation method of a large component. As can be seen from the table, the maximum stress point of 4 working conditions occurs at the No. 2 target node of the Mymin limit load working condition, and the maximum error between the synthesized stress and the calculated stress is 0.343%. For the point with smaller stress, the error will be larger, with the maximum error reaching 11.666%. However, when judging whether the static strength of the large part meets the requirement, the maximum stress value is used for judging, and the point with small stress can be ignored, so the error value of the synthetic stress of the main shaft and the calculated stress is 0.343%, and the error value is very small.
TABLE 5 comparison table of principal axis composite stress and finite element results (stress units MPa)
And (4) rapidly evaluating the static strength of the main frame and the bearing seat by the same method to obtain a comparison table of the synthetic stress of the main frame and the bearing seat and a finite element result.
Table 6 is a table comparing the results of the composite stress and finite element of the main frame, and only results of target nodes No. 8 to 17 and four extreme load conditions are selected for comparative analysis. As can be seen from the table, the maximum stress point for the 4 conditions, which occurs at target node No. 15 for the Mzmax limit load condition, has a maximum error of-0.87% for the resultant stress and the calculated stress. In addition, the error of the point with smaller stress is larger.
TABLE 6 comparison table of mainframe composite stress and finite element results (stress units MPa)
Table 7 is a comparison table of the synthetic stress and finite element results of the bearing seat, and only results of No. 1 to No. 7 target nodes and four extreme load conditions are selected for comparative analysis. As can be seen from the table, the maximum stress point of 4 working conditions occurs at the No. 5 target node of the Mymin limit load working condition, and the maximum error between the synthesized stress and the calculated stress is 5.61%. In addition, the error of the point where the stress is small is large.
TABLE 7 bearing seat composite stress and finite element results comparison Table (stress units MPa)
In summary, in the above examples, tables 3 and 4 show the corresponding relationship between the stress component and the load component in the strength analysis database, and tables 5, 6 and 7 show the error value and the reliability of the rapid evaluation method. Obviously, the results of the above example successfully show that the method used in the embodiment of the present invention is reliable and has high precision, and the fast evaluation method for the static strength of the large component of the wind turbine generator set established by the method can be used for fast evaluation of the wind field adaptability of the wind turbine generator set.
The static strength rapid evaluation method established by the invention has the following advantages:
1. the method has the advantages that the rapid response is realized, and the rapid assessment (namely an 'input-output' mode) of the static strength of the large part is realized, so that the market bidding work is responded rapidly, and the overall efficiency is improved;
2. the method can quickly realize the machine position-by-machine position analysis, quickly realize the differentiation and the optimized design of the machine set, and make up for the defect that the conventional analysis method has lower speed;
3. the method realizes the process, the data and the systematization of the large-part static strength analysis process, has the possibility of sustainability optimization, and enhances the competitiveness of the early-stage technical support of the wind power plant.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (8)
1. A method for rapidly evaluating the static strength of a large part of a wind turbine generator is characterized by comprising the following steps: the method comprises the following steps:
(1) establishing a strength analysis database containing the corresponding relation between each stress component and the load component of the key nodes of the large component;
(2) based on the strength analysis database, the method of stress component interpolation and equivalent stress synthesis is adopted to carry out rapid evaluation on the static strength of the large part;
(3) comparing the results of the rapid evaluation method and the finite element method, calculating to obtain an error value of the evaluation result, synthesizing the stress component interpolation and the equivalent stress, and correcting the error value to obtain a static strength evaluation method;
in the step (1), the minimum value and the maximum value of the 6 load components are set according to the limit working condition load table, the minimum value and the maximum value need to envelop the values in the limit load table, a loading working condition table is constructed, and the load is divided into a plurality of grades to be sequentially loaded.
2. The method for rapidly evaluating the static strength of the large part of the wind turbine generator set as claimed in claim 1, which is characterized in that: in the step (1), a typical wind turbine model is selected, and a limit working condition load table of the load designed by the wind turbine is obtained.
3. The method for rapidly evaluating the static strength of the large part of the wind turbine generator set as claimed in claim 1, which is characterized in that: in the step (1), target nodes are selected according to the static strength finite element calculation result under the ultimate load, and the nodes are uniformly distributed in the area where the surface stress value of the main shaft is larger than the set value.
4. The method for rapidly evaluating the static strength of the large part of the wind turbine generator set as claimed in claim 1, which is characterized in that: in the step (1), the constructed static strength finite element model is used for calculating six stress components of the target node under each loading working condition, so as to obtain the corresponding relation between the stress components of the 6 nodes and each load component, and form a strength analysis database.
5. The method for rapidly evaluating the static strength of the large part of the wind turbine generator set as claimed in claim 1, which is characterized in that: in the step (2), according to the strength analysis database, certain target node stress components corresponding to the corresponding load components in the working condition are obtained through linear interpolation, the target node stress components in the working condition are added to obtain a resultant force of the target node stress components, and the equivalent stress of the target node is obtained through synthesis by using a Von semiconductors stress formula.
6. The method for rapidly evaluating the static strength of the large part of the wind turbine generator set as claimed in claim 1, which is characterized in that: in the step (3), the maximum error between the synthesized stress and the calculated stress is used as an error value.
7. The method for rapidly evaluating the static strength of the large part of the wind turbine generator set as claimed in claim 1, which is characterized in that: in the step (3), an error value of the rapid evaluation method is obtained through comparative analysis of the finite element analysis result and the rapid evaluation result, and the error value is taken into consideration when the static strength of the large part is rapidly evaluated.
8. The method for rapidly evaluating the static strength of the large part of the wind turbine generator set as claimed in claim 1, which is characterized in that: the stress components included 6 in total.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710757277.2A CN107563041B (en) | 2017-08-29 | 2017-08-29 | Rapid assessment method for static strength of large part of wind turbine generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710757277.2A CN107563041B (en) | 2017-08-29 | 2017-08-29 | Rapid assessment method for static strength of large part of wind turbine generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107563041A CN107563041A (en) | 2018-01-09 |
| CN107563041B true CN107563041B (en) | 2020-12-04 |
Family
ID=60977521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710757277.2A Active CN107563041B (en) | 2017-08-29 | 2017-08-29 | Rapid assessment method for static strength of large part of wind turbine generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107563041B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111985084B (en) * | 2020-07-24 | 2023-10-27 | 华设设计集团股份有限公司 | Bridge mechanics real-time analysis method based on finite variable |
| CN112182939B (en) * | 2020-10-16 | 2022-11-18 | 中国航发四川燃气涡轮研究院 | Dynamic strength evaluation method for engine bearing frame |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826131A (en) * | 2009-03-04 | 2010-09-08 | 中国核电工程有限公司 | Method for calculating and evaluating stress of massive standard parts under different loads |
| US8249837B1 (en) * | 2009-07-28 | 2012-08-21 | Textron Innovations, Inc. | Method for optimization of sheet metal forming tool topology |
| CN103366049A (en) * | 2013-06-25 | 2013-10-23 | 沈阳华创风能有限公司 | Computing method for hub ultimate strength of wind turbine generator system |
| CN104155092A (en) * | 2014-08-16 | 2014-11-19 | 中国科学院工程热物理研究所 | Wind turbine blade static analysis method |
| CN104537424A (en) * | 2014-10-28 | 2015-04-22 | 北京天源科创风电技术有限责任公司 | Method for establishing predicated response system based on wind turbine generator load database |
| CN105760641A (en) * | 2014-12-15 | 2016-07-13 | 南车株洲电力机车研究所有限公司 | Nonstandard wind field oriented wind turbine generator fatigue life efficient assessment method |
| CN106570204A (en) * | 2016-09-23 | 2017-04-19 | 西安交通大学 | Method for analyzing static strength characteristics of turbomachinery blade based on CPU+GPU heterogeneous parallel computing |
| CN106815771A (en) * | 2015-12-02 | 2017-06-09 | 中国电力科学研究院 | A kind of long-term evaluation method of wind power plant load |
-
2017
- 2017-08-29 CN CN201710757277.2A patent/CN107563041B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826131A (en) * | 2009-03-04 | 2010-09-08 | 中国核电工程有限公司 | Method for calculating and evaluating stress of massive standard parts under different loads |
| US8249837B1 (en) * | 2009-07-28 | 2012-08-21 | Textron Innovations, Inc. | Method for optimization of sheet metal forming tool topology |
| CN103366049A (en) * | 2013-06-25 | 2013-10-23 | 沈阳华创风能有限公司 | Computing method for hub ultimate strength of wind turbine generator system |
| CN104155092A (en) * | 2014-08-16 | 2014-11-19 | 中国科学院工程热物理研究所 | Wind turbine blade static analysis method |
| CN104537424A (en) * | 2014-10-28 | 2015-04-22 | 北京天源科创风电技术有限责任公司 | Method for establishing predicated response system based on wind turbine generator load database |
| CN105760641A (en) * | 2014-12-15 | 2016-07-13 | 南车株洲电力机车研究所有限公司 | Nonstandard wind field oriented wind turbine generator fatigue life efficient assessment method |
| CN106815771A (en) * | 2015-12-02 | 2017-06-09 | 中国电力科学研究院 | A kind of long-term evaluation method of wind power plant load |
| CN106570204A (en) * | 2016-09-23 | 2017-04-19 | 西安交通大学 | Method for analyzing static strength characteristics of turbomachinery blade based on CPU+GPU heterogeneous parallel computing |
Non-Patent Citations (2)
| Title |
|---|
| Loading Analysis and Strength Calculation of Wind Turbine Blade Based on Blade Element Momentum Theory and Finite Element Method;Wei Duan，Feng Zhao;《2010 Asia-Pacific Power and Energy Engineering Conference》;IEEE;20100415;第1-4页 * |
| 大型直驱型风力发电机组轮毂强度分析;何玉林，杨豆思，金鑫，彭小云;《机械科学与技术》;20121130;第31卷(第11期);第1824-1830页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107563041A (en) | 2018-01-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107563041B (en) | Rapid assessment method for static strength of large part of wind turbine generator | |
| CN104573172A (en) | Fatigue analysis method and fatigue analysis device of structural member in wind generating set | |
| CN109490116A (en) | A kind of wing Plumb load method of full scale fatigue test | |
| CN109299579B (en) | Method for correcting wind tunnel force test data of large-aspect-ratio aircraft | |
| CN106293940A (en) | A kind of method of parallel race batch in financial industry | |
| CN113127366B (en) | Matrix automatic test method based on model and computer readable storage medium | |
| CN108629114B (en) | Assembly tolerance simulation analysis method for airplane assembly connection deformation | |
| US20150355215A1 (en) | Approach to assess available wind resource distribution based on interpolation method | |
| CN107480357B (en) | Finite element model boundary simulation method for multi-rod structure | |
| CN104834795B (en) | Band connection structure nonlinear contact with friction simulated behavior method and system | |
| CN103106349A (en) | Method for calculating radial stress of annular valve plate of vibration absorber | |
| CN111159948B (en) | Reliability analysis method of joint bearing considering random uncertainty | |
| CN113836625A (en) | Power transmission tower anti-seismic performance grade division method and system based on power spectrum method | |
| CN115081260A (en) | Safety numerical evaluation method for rotor system of aircraft engine | |
| CN112016170A (en) | Wind power main shaft bearing design calculation and model selection method and device | |
| CN108776746B (en) | Dynamic stiffness optimization method for improving dynamic characteristics of machine tool | |
| CN114564864A (en) | Fan hub strength analysis method, system, equipment and storage medium | |
| CN109117547B (en) | Method for optimizing dynamic characteristics of large part structure of machine tool | |
| CN113919199A (en) | Rapid analysis and evaluation method for strength working condition of lightweight steering knuckle | |
| CN109117597A (en) | A kind of processing key factor stage division based on correspondence analysis | |
| CN109989890B (en) | Method, device, equipment and medium for designing steel cylindrical tower of wind generating set | |
| CN112115616A (en) | Dynamic characteristic analysis method and device of power transmission tower | |
| CN107704714B (en) | Method and system for processing finite element simulation stress value and test stress value | |
| CN116127554B (en) | Intelligent unloading construction method and system for large-span structure capable of reducing unloading mutation | |
| CN112528388B (en) | Suspension bracket strength analysis method and device, storage medium and terminal equipment |
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 | ||
| GR01 | Patent grant |