公开(公告)号：US09639637B2

公开(公告)日：2017-05-02

申请号：US14015084

申请日：2013-08-30

申请人： Xuefei Guan ,  Jingdan Zhang ,  Shaohua Kevin Zhou

发明人： Xuefei Guan ,  Jingdan Zhang ,  Shaohua Kevin Zhou

IPC分类号： G06F7/60 ,  G06F17/10 ,  G06F17/50

CPC分类号： G06F17/5009 ,  G06F2217/10 ,  G06F2217/76

摘要： A method for predicting fatigue crack growth in materials includes providing a prior distribution obtained using response measures from one or more target components using a fatigue crack growth model as a constraint function, receiving new crack length measurements, providing a posterior distribution obtained using the new crack length measurements, and sampling the posterior distribution to obtain crack length measurement predictions.

公开(公告)号：US20130191041A1

公开(公告)日：2013-07-25

申请号：US13742615

申请日：2013-01-16

申请人： Xuefei Guan ,  Jingdan Zhang ,  Shaohua Kevin Zhou ,  Mark W. Fischer ,  Waheed A. Abbasi ,  Scott A. Karstetter ,  Christopher John William Adams

发明人： Xuefei Guan ,  Jingdan Zhang ,  Shaohua Kevin Zhou ,  Mark W. Fischer ,  Waheed A. Abbasi ,  Scott A. Karstetter ,  Christopher John William Adams

IPC分类号： G01N27/90 ,  G06F17/11

CPC分类号： G01N27/904 ,  G01N27/20 ,  G01N27/82 ,  G01R31/1227 ,  G01R31/34 ,  G06F17/11

摘要： In a general methodology for insulation defect identification in a generator core, a Chattock coil is used to measure magnetic potential difference between teeth. Physical knowledge and empirical knowledge is combined in a model to predict insulation damage location and severity. Measurements are taken at multiple excitation frequencies to solve for multiple characteristics of the defect.

摘要翻译： 在发电机铁心中用于绝缘缺陷识别的一般方法中，使用Chattock线圈来测量齿之间的磁势差。 物理知识和经验知识结合在一个模型中，以预测绝缘损伤位置和严重程度。 在多个激发频率下进行测量以解决缺陷的多个特征。

公开(公告)号：US09792555B2

公开(公告)日：2017-10-17

申请号：US14106919

申请日：2013-12-16

申请人： Xuefei Guan ,  Jingdan Zhang ,  Shaohua Kevin Zhou ,  Kai Kadau ,  Yan Guo ,  El Mahjoub Rasselkorde ,  Waheed A. Abbasi ,  Chin-Sheng Lee ,  Ashley L. Lewis ,  Steve H. Radke

发明人： Xuefei Guan ,  Jingdan Zhang ,  Shaohua Kevin Zhou ,  Kai Kadau ,  Yan Guo ,  El Mahjoub Rasselkorde ,  Waheed A. Abbasi ,  Chin-Sheng Lee ,  Ashley L. Lewis ,  Steve H. Radke

IPC分类号： G06N7/00 ,  G06F17/50 ,  G01N29/44

CPC分类号： G06N7/005 ,  G01N29/4472 ,  G01N2203/0066 ,  G01N2203/0073 ,  G01N2203/0214 ,  G01N2291/0258 ,  G06F17/5009

摘要： A method for probabilistic fatigue life prediction using nondestructive testing data considering uncertainties from nondestructive examination (NDE) data and fatigue model parameters. The method utilizes uncertainty quantification models for detection, sizing, fatigue model parameters and inputs. A probability of detection model is developed based on a log-linear model coupling an actual flaw size with a nondestructive examination (NDE) reported size. A distribution of the actual flaw size is derived for both NDE data without flaw indications and NDE data with flaw indications by using probabilistic modeling and Bayes theorem. A turbine rotor example with real world NDE inspection data is presented to demonstrate the overall methodology.

公开(公告)号：US09541530B2

公开(公告)日：2017-01-10

申请号：US13743601

申请日：2013-01-17

申请人： Xuefei Guan ,  Hui Zhen ,  Jingdan Zhang ,  Shaohua Kevin Zhou ,  Ashley L. Lewis ,  Steve H. Radke ,  Chin-Sheng Lee

发明人： Xuefei Guan ,  Hui Zhen ,  Jingdan Zhang ,  Shaohua Kevin Zhou ,  Ashley L. Lewis ,  Steve H. Radke ,  Chin-Sheng Lee

IPC分类号： G01N29/34 ,  G06F17/00 ,  G01N17/00

CPC分类号： G01N29/34 ,  G01N17/00 ,  G06F17/00

摘要： A method of fatigue life prediction including: calculating a critical crack size of an object of interest; identifying a first flaw in ultrasound data of the object of interest; determining that the first flaw interacts with a second flaw, the first flaw is to be merged with the second flaw, or the first flaw is isolated; calculating an initial crack size based on the determination; and calculating an increase in the initial crack size due to fatigue and creep to determine a number of load cycles until the initial crack size reaches the critical crack size.

摘要翻译： 一种疲劳寿命预测方法，包括：计算感兴趣对象的临界裂纹尺寸; 识别感兴趣对象的超声数据中的第一缺陷; 确定第一缺陷与第二缺陷相互作用，第一缺陷将与第二缺陷合并，或者第一缺陷被隔离; 基于确定计算初始裂纹尺寸; 并计算由于疲劳和蠕变引起的初始裂纹尺寸的增加，以确定直到初始裂纹尺寸达到临界裂纹尺寸为止的负载循环次数。

公开(公告)号：US20130268214A1

公开(公告)日：2013-10-10

申请号：US13855130

申请日：2013-04-02

申请人： Xuefei Guan ,  Jingdan Zhang ,  Kai Kadau ,  Shaohua Kevin Zhou

发明人： Xuefei Guan ,  Jingdan Zhang ,  Kai Kadau ,  Shaohua Kevin Zhou

IPC分类号： G01N29/44

CPC分类号： G01N29/4418 ,  G01N17/00 ,  G01N29/4472 ,  G01N2203/0218 ,  G01N2291/0258

摘要： A method for probabilistically predicting fatigue life in materials includes sampling a random variable for an actual equivalent initial flaw size (EIFS), generating random variables for parameters (ln C, m) of a fatigue crack growth equation  a  N = C  ( Δ   K ) m from a multivariate distribution, and solving the fatigue crack growth equation using these random variables. The reported EIFS data is obtained by ultrasonically scanning a target object, recording echo signals from the target object, and converting echo signal amplitudes to equivalent reflector sizes using previously recorded values from a scanned calibration block. The equivalent reflector sizes comprise the reported EIFS data.

摘要翻译： 一种用于概率预测材料疲劳寿命的方法包括对实际等效初始缺陷尺寸（EIFS）采样随机变量，为疲劳裂纹扩展方程的参数（ln C，m）生成随机变量a N = C Delta多普勒K）m，并使用这些随机变量求解疲劳裂纹扩展方程。 报告的EIFS数据是通过超声扫描目标物体，记录来自目标物体的回波信号，并使用先前记录的来自扫描校准块的值将回波信号幅度转换为等效反射镜尺寸而获得的。 等效的反射器尺寸包括报告的EIFS数据。

公开(公告)号：US09658192B2

公开(公告)日：2017-05-23

申请号：US13742615

申请日：2013-01-16

申请人： Xuefei Guan ,  Jingdan Zhang ,  Shaohua Kevin Zhou ,  Mark W. Fischer ,  Waheed A. Abbasi ,  Scott A. Karstetter ,  Christopher John William Adams

发明人： Xuefei Guan ,  Jingdan Zhang ,  Shaohua Kevin Zhou ,  Mark W. Fischer ,  Waheed A. Abbasi ,  Scott A. Karstetter ,  Christopher John William Adams

IPC分类号： G01N27/82 ,  G01N27/90 ,  G06F17/11 ,  G01R31/34 ,  G01N27/20 ,  G01R31/12

CPC分类号： G01N27/904 ,  G01N27/20 ,  G01N27/82 ,  G01R31/1227 ,  G01R31/34 ,  G06F17/11

摘要： In a general methodology for insulation defect identification in a generator core, a Chattock coil is used to measure magnetic potential difference between teeth. Physical knowledge and empirical knowledge is combined in a model to predict insulation damage location and severity. Measurements are taken at multiple excitation frequencies to solve for multiple characteristics of the defect.

公开(公告)号：US20140200853A1

公开(公告)日：2014-07-17

申请号：US14146751

申请日：2014-01-03

申请人： Xuefei Guan ,  Jingdan Zhang ,  Shaohua Kevin Zhou ,  El Mahjoub Rasselkorde ,  Waheed A. Abbasi ,  Steve H. Radke ,  Chin-Sheng Lee ,  Ashley L. Lewis

发明人： Xuefei Guan ,  Jingdan Zhang ,  Shaohua Kevin Zhou ,  El Mahjoub Rasselkorde ,  Waheed A. Abbasi ,  Steve H. Radke ,  Chin-Sheng Lee ,  Ashley L. Lewis

IPC分类号： G01N29/44

CPC分类号： G01N29/4445 ,  G01N29/069 ,  G01N2291/2693 ,  G06T17/00

摘要： A method and software system for flaw identification, grouping and sizing for fatigue life assessment for rotors used in turbines and generators. The method includes providing ultrasonic data of a plurality of rotor slices and providing volume reconstruction of the ultrasonic data. The method also includes providing in-slice identification, grouping and sizing of flaw indications in the rotor based on the volume reconstruction. Further, the method includes providing inter-slice identification, grouping and sizing of the flaw indications based on the in-slice flaw indications and providing flaw location and size information. The method can be used in both phased-array and A-scan inspections.

摘要翻译： 用于涡轮机和发电机中使用的转子的疲劳寿命评估的缺陷识别，分组和尺寸的方法和软件系统。 该方法包括提供多个转子切片的超声波数据并提供超声波数据的体积重建。 该方法还包括基于体积重建提供转子中的缺陷指示的片内识别，分组和尺寸。 此外，该方法包括基于片内缺陷指示提供缺陷指示的片间识别，分组和大小，并提供缺陷位置和大小信息。 该方法可用于相控阵和A扫描检查。

公开(公告)号：US20140100798A1

公开(公告)日：2014-04-10

申请号：US14028594

申请日：2013-09-17

申请人： Xuefei Guan ,  Jingdan Zhang ,  Shaohua Kevin Zhou ,  Nancy H. Ulerich ,  Nam Eung Kim ,  Nikolai R. Tevs

发明人： Xuefei Guan ,  Jingdan Zhang ,  Shaohua Kevin Zhou ,  Nancy H. Ulerich ,  Nam Eung Kim ,  Nikolai R. Tevs

IPC分类号： G01L5/00

CPC分类号： G01L5/00 ,  G01D21/00 ,  G01H17/00 ,  G01M5/0016 ,  G01M5/0041 ,  G01M15/14 ,  G01N3/56 ,  G06F17/40 ,  G06F19/00

摘要： A method dynamically reconstructing a stress and strain field of a turbine blade includes providing a set of response measurements from at least one location on a turbine blade, band-pass filtering the set of response measurements based on an upper frequency limit and a lower frequency limit, determining an upper envelope and a lower envelope of the set of response measurements from local minima and local maxima of the set of response measurements, calculating a candidate intrinsic mode function (IMF) from the upper envelope and the lower envelope of the set of response measurements, providing an N×N mode shape matrix for the turbine blade, where N is the number of degrees of freedom of the turbine blade, when the candidate IMF is an actual IMF, and calculating a response for another location on the turbine blade from the actual IMF and mode shapes in the mode shape matrix.

摘要翻译： 动态重建涡轮叶片的应力和应变场的方法包括从涡轮叶片上的至少一个位置提供一组响应测量值，基于上限频率和较低频率限制对该组响应测量值进行带通滤波 从响应测量集合的局部最小值和局部最大值确定响应测量集合的上包络和下包络，从该响应集合的上包络和下包络计算候选固有模函数（IMF） 提供用于涡轮叶片的N×N模式形状矩阵，其中N是涡轮叶片的自由度的数量，当候选IMF是实际IMF时，以及计算涡轮机叶片上另一位置的响应 模式形状矩阵中的实际IMF和模式形状。

公开(公告)号：US09835596B2

公开(公告)日：2017-12-05

申请号：US14146751

申请日：2014-01-03

申请人： Xuefei Guan ,  Jingdan Zhang ,  Shaohua Kevin Zhou ,  El Mahjoub Rasselkorde ,  Waheed A. Abbasi ,  Steve H. Radke ,  Chin-Sheng Lee ,  Ashley L. Lewis

发明人： Xuefei Guan ,  Jingdan Zhang ,  Shaohua Kevin Zhou ,  El Mahjoub Rasselkorde ,  Waheed A. Abbasi ,  Steve H. Radke ,  Chin-Sheng Lee ,  Ashley L. Lewis

IPC分类号： G01N29/44 ,  G01N29/06 ,  G06T17/00

CPC分类号： G01N29/4445 ,  G01N29/069 ,  G01N2291/2693 ,  G06T17/00

摘要： A method and software system for flaw identification, grouping and sizing for fatigue life assessment for rotors used in turbines and generators. The method includes providing ultrasonic data of a plurality of rotor slices and providing volume reconstruction of the ultrasonic data. The method also includes providing in-slice identification, grouping and sizing of flaw indications in the rotor based on the volume reconstruction. Further, the method includes providing inter-slice identification, grouping and sizing of the flaw indications based on the in-slice flaw indications and providing flaw location and size information. The method can be used in both phased-array and A-scan inspections.

公开(公告)号：US20140229149A1

公开(公告)日：2014-08-14

申请号：US14106919

申请日：2013-12-16

申请人： Xuefei Guan ,  Jingdan Zhang ,  Shaohua Kevin Zhou ,  Kai Kadau ,  Yan Guo ,  El Mahjoub Rasselkorde ,  Waheed A. Abbasi ,  Chin-Sheng Lee ,  Ashley L. Lewis ,  Steve H. Radke

发明人： Xuefei Guan ,  Jingdan Zhang ,  Shaohua Kevin Zhou ,  Kai Kadau ,  Yan Guo ,  El Mahjoub Rasselkorde ,  Waheed A. Abbasi ,  Chin-Sheng Lee ,  Ashley L. Lewis ,  Steve H. Radke

IPC分类号： G06N7/00 ,  G06F17/50

CPC分类号： G06N7/005 ,  G01N29/4472 ,  G01N2203/0066 ,  G01N2203/0073 ,  G01N2203/0214 ,  G01N2291/0258 ,  G06F17/5009

摘要： A method for probabilistic fatigue life prediction using nondestructive testing data considering uncertainties from nondestructive examination (NDE) data and fatigue model parameters. The method utilizes uncertainty quantification models for detection, sizing, fatigue model parameters and inputs. A probability of detection model is developed based on a log-linear model coupling an actual flaw size with a nondestructive examination (NDE) reported size. A distribution of the actual flaw size is derived for both NDE data without flaw indications and NDE data with flaw indications by using probabilistic modeling and Bayes theorem. A turbine rotor example with real world NDE inspection data is presented to demonstrate the overall methodology.

摘要翻译： 考虑非破坏性检查（NDE）数据和疲劳模型参数的不确定性，使用非破坏性测试数据的概率疲劳寿命预测方法。 该方法利用不确定性量化模型进行检测，大小，疲劳模型参数和输入。 基于将实际缺陷大小与非破坏性检查（NDE）报告的大小相联系的对数线性模型开发了检测概率。 通过使用概率建模和贝叶斯定理，可以为无缺陷指示的NDE数据和缺陷指示的NDE数据导出实际缺陷大小的分布。 提出了具有真实世界NDE检测数据的涡轮转子实例，以演示整体方法。