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学者姓名：何存富
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摘要 ：
针对重大基础设施安全运行需要,本文进行了金属板结构疲劳损伤非线性兰姆波检测方法研究.基于兰姆波二次谐波产生条件,确定了产生二次谐波积累增长效应的两种兰姆波模态及对应的激励频率.通过有限元仿真,研究了材料性能改变对兰姆波非线性效应的影响,证明了二倍频兰姆波非线性系数对材料性能退化表征的有效性.在此基础上,开展了金属板结构疲劳损伤非线性兰姆波检测实验研究.将极性反转方法应用于疲劳试件检测实验中,有效提高了检测信号中二倍频兰姆波的幅值和信噪比.实验结果表明,两种兰姆波模态对的二次谐波非线性系数均随疲劳损伤增加呈线性增长趋势,但基频S(0,2)模态和二倍频S(0,4)模态对对疲劳损伤检测的灵敏度更高,更适合金属板结构疲劳损伤检测.
关键词 ：
极性反转法 极性反转法 疲劳损伤 疲劳损伤 二倍频兰姆波 二倍频兰姆波 无损检测 无损检测 非线性超声 非线性超声
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| GB/T 7714 | 焦敬品 , 刘芸 , 吴斌 et al. 金属板结构疲劳损伤二倍频兰姆波检测方法研究 [J]. | 实验力学 , 2021 , 36 (2) : 157-166 . |
| MLA | 焦敬品 et al. "金属板结构疲劳损伤二倍频兰姆波检测方法研究" . | 实验力学 36 . 2 (2021) : 157-166 . |
| APA | 焦敬品 , 刘芸 , 吴斌 , 何存富 . 金属板结构疲劳损伤二倍频兰姆波检测方法研究 . | 实验力学 , 2021 , 36 (2) , 157-166 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Aiming at quantitative identification of defects in structures, the scattering characteristics of defects in structures are studied. The scattering simulation model of elliptic defect is established and the effect of defect deflection angle and size on the de-correlation of scattering signal is studied. The results show that the de-correlation coefficient matrix of ultrasonic signal has a great correlation with the defect geometry state (such as size and angle), but it is not a simple linear correlation. On this basis, combining the parametric finite element analysis and Bayesian theory, a defect inversion method based on ultrasonic scattering signal de-correlation analysis is developed, and the numerical simulation and detection experiments of defect inversion are carried out. The results show that the developed defect inversion method can well realize the inversion of the position and size of defect in aluminum block and plate. The inversion error of the open defect size (depth) of the aluminum block is about 0.2 times of the excitation wavelength, and the position error is about 0.6 times of the excitation wavelength. The inversion error of the circular defect size of aluminum plate is about 0.04 times of the excitation wavelength, and the position error is about 0.4 times of the excitation wavelength. The research work has made a beneficial exploration for the quantitative identification and evaluation of defects in structures. © 2021 Acta Acustica.
关键词 ：
Correlation methods Correlation methods Aluminum Aluminum Plates (structural components) Plates (structural components) Defects Defects Numerical methods Numerical methods Errors Errors Ultrasonic applications Ultrasonic applications Correlation detectors Correlation detectors Ultrasonic scattering Ultrasonic scattering
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| GB/T 7714 | Li, Li , Jiao, Jingpin , Wu, Bin et al. Ultrasonic scattering signal de-correlation analysis and Bayesian inversion method for defect quantification [J]. | Acta Acustica , 2021 , 46 (2) : 281-291 . |
| MLA | Li, Li et al. "Ultrasonic scattering signal de-correlation analysis and Bayesian inversion method for defect quantification" . | Acta Acustica 46 . 2 (2021) : 281-291 . |
| APA | Li, Li , Jiao, Jingpin , Wu, Bin , He, Cunfu . Ultrasonic scattering signal de-correlation analysis and Bayesian inversion method for defect quantification . | Acta Acustica , 2021 , 46 (2) , 281-291 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
针对传统全矩阵数据采集数据量大、采样时长随阵元个数增加的问题,提出了一种基于压缩感知的超声阵列全矩阵数据重构方法.根据多阵元等幅同步有限次激励下采集的超声信号与全矩阵数据的压缩采样关系,利用多阵元等幅同步有限次激励下采集到的少量超声信号进行超声阵列全矩阵数据重构,并将重构数据用于缺陷的全聚焦成像.基于提出的数据压缩采集模式,开展了块状试件中缺陷超声相控阵检测实验,并分析了稀疏变换基、激励阵元个数、激励次数等因素对检测结果的影响规律.实验结果表明,提出的方法可以在75％压缩率下实现超声全矩阵数据的重构,重构数据与实际全矩阵数据的均方根误差约为6％,可用于缺陷的全聚焦成像.
关键词 ：
无损检测 无损检测 压缩感知 压缩感知 超声相控阵 超声相控阵 全矩阵数据 全矩阵数据
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| GB/T 7714 | 吴斌 , 刘萧冰 , 焦敬品 et al. 一种基于压缩感知的超声阵列全矩阵数据重构方法 [J]. | 测控技术 , 2021 , 40 (3) : 96-101 . |
| MLA | 吴斌 et al. "一种基于压缩感知的超声阵列全矩阵数据重构方法" . | 测控技术 40 . 3 (2021) : 96-101 . |
| APA | 吴斌 , 刘萧冰 , 焦敬品 , 何存富 . 一种基于压缩感知的超声阵列全矩阵数据重构方法 . | 测控技术 , 2021 , 40 (3) , 96-101 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
基于微磁原理,研制了曲轴轴颈表层材料磁滞回线及磁巴克豪森信号的检测传感器。测试结果表明:磁滞回线及磁巴克豪森信号可以有效反映轴颈表面硬化层深度的变化,其中磁滞回线特征参量Wr和MBN蝶形曲线半峰宽均随硬化层深度增加呈现两阶段变化规律。实验结果验证了微磁方法可以对曲轴轴颈表面硬化层深度进行无损检测。
关键词 ：
微磁传感器 微磁传感器 曲轴轴颈 曲轴轴颈 硬化层深度 硬化层深度 磁滞回线 磁滞回线 磁巴克豪森噪声 磁巴克豪森噪声
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| GB/T 7714 | 王晶 , 王姗姗 , 刘秀成 et al. 汽车曲轴轴颈表面淬硬层深度的微磁检测传感器研制 [C] //第十八届北方七省市区力学学会学术会议论文集 . 2021 . |
| MLA | 王晶 et al. "汽车曲轴轴颈表面淬硬层深度的微磁检测传感器研制" 第十八届北方七省市区力学学会学术会议论文集 . (2021) . |
| APA | 王晶 , 王姗姗 , 刘秀成 , 何存富 . 汽车曲轴轴颈表面淬硬层深度的微磁检测传感器研制 第十八届北方七省市区力学学会学术会议论文集 . (2021) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Residual plastic deformation induced in low-carbon steels usually demonstrates anisotropy. Eddy current method is applicable for the residual plastic deformation evaluation. However, it is difficult to efficiently evaluate both the principal strain direction and magnitude of residual plastic deformation with the conventional eddy current method. To solve these limitations, a novel method of oscillatory rotating eddy current (OREC) was developed and successfully applied in characterizing the anisotropy of residual plastic deformation in low-carbon steels. The parameters of eddy current response obtained under different frequencies were extracted to characterize the plastic deformation and then the characterization performances of extracted parameters were compared. The compound voltage signal and real part of the impedance could better characterize the residual plastic deformation than the imaginary part of the impedance. It was found that the angle of the major axis of the selected 8-shaped patterns measured with OREC was a good indicator of the principal strain direction. As the residual plastic deformation was increased, the length of the major axis of the 8-shaped patterns monotonously increased despite its sensitivity to the plastic deformation was frequency-dependent.
关键词 ：
Low-carbon steel Low-carbon steel Oscillatory rotating eddy current Oscillatory rotating eddy current Residual plastic deformation Residual plastic deformation Anisotropy evaluation Anisotropy evaluation
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| GB/T 7714 | Wang, Nan , Liu, Xiucheng , Yang, Jieming et al. Evaluation of the Residual Plastic Deformation in Low-Carbon Steel with the Oscillatory Rotating Eddy Current Method [J]. | JOURNAL OF NONDESTRUCTIVE EVALUATION , 2021 , 40 (3) . |
| MLA | Wang, Nan et al. "Evaluation of the Residual Plastic Deformation in Low-Carbon Steel with the Oscillatory Rotating Eddy Current Method" . | JOURNAL OF NONDESTRUCTIVE EVALUATION 40 . 3 (2021) . |
| APA | Wang, Nan , Liu, Xiucheng , Yang, Jieming , He, Cunfu . Evaluation of the Residual Plastic Deformation in Low-Carbon Steel with the Oscillatory Rotating Eddy Current Method . | JOURNAL OF NONDESTRUCTIVE EVALUATION , 2021 , 40 (3) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
For an operating wind turbine, the main shaft suffers severe structural damage. The surface breaking transverse crack threatens the safety of drive-train system directly. The crack examination method is available by diffracted waves in the central hole. In this research, an electromagnetic acoustic transducer (EMAT) for receiving diffracted longitudinal waves is proposed. Firstly, the converse piezomagnetic stress coefficients and magnetostriction coefficient were derived from the measured magnetic characteristic curve. The measured parameters were provided for sensor simulation. Considering the two coupling mechanisms, a receiving EMAT model was established for coil optimization. Secondly, the influence of materials, lift-off distance and cable type on sensor impedance would be analyzed in detail. Multiple factors were taken into account for impedance matching, and the signal amplitude was improved significantly. The angle divergence of the EMAT was also measured, showing the main lobe with 24 degrees. The crack detection experiments were carried out on a shaft sample. The results show that the developed EMAT can achieve the reception of diffracted longitudinal waves, and the signals are distinguishable. The crack was evaluated simultaneously by the received diffracted waves, and the errors showed less than 3 mm.
关键词 ：
longitudinal wave longitudinal wave impedance impedance main shaft main shaft central hole central hole electromagnetic acoustic transducer electromagnetic acoustic transducer wind turbine wind turbine
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| GB/T 7714 | Cheng, Jun , Lyu, Yan , Chen, Hao et al. Electromagnetic acoustic transducer for receiving longitudinal wave in the central hole of the wind turbine main shaft [J]. | SMART MATERIALS AND STRUCTURES , 2021 , 30 (7) . |
| MLA | Cheng, Jun et al. "Electromagnetic acoustic transducer for receiving longitudinal wave in the central hole of the wind turbine main shaft" . | SMART MATERIALS AND STRUCTURES 30 . 7 (2021) . |
| APA | Cheng, Jun , Lyu, Yan , Chen, Hao , Song, Guorong , Zheng, Yang , He, Cunfu . Electromagnetic acoustic transducer for receiving longitudinal wave in the central hole of the wind turbine main shaft . | SMART MATERIALS AND STRUCTURES , 2021 , 30 (7) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
In the case of assuming that the debonding interface layer was a thin fluid layer and taking the structural boundary conditions into consideration, we derived the expressions of ultrasonic reflection/transmission coefficients in a thick adhesive layer composite structure with debonding and slip defects under water immersion conditions based on the global matrix method. In addition,the finite element method was used to calculate the ultrasonic reflection/transmission coefficients when the bonding interface is debonded and slipped in the bonding structure. The theoretical calculation and simulation results are in complete agreement. The influences of the position of the interface defects (upper or lower interface of the adhesive layer) and defect types (slippage, debonding) on the ultrasonic reflection characteristics were also studied. The results show that if the incident angle and frequency of the sound wave are set appropriately, the perfected bonding, slippage and debonding interfaces can be distinguished.
关键词 ：
Reflection and transmission coefficients Reflection and transmission coefficients Donding structure Donding structure Debonding and slippage Debonding and slippage Composite materials Composite materials
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| GB/T 7714 | Liu, Bing , Wu, Bin , Lyu, Yan et al. INFLUENCE OF INTERFACE DEFECTS ON ULTRASONIC REFLECTION/TRANSMISSION CHARACTERISTICS OF THICK ADHESIVE LAYER COMPOSITE BONDING STRUCTURE [C] . 2021 : 353-357 . |
| MLA | Liu, Bing et al. "INFLUENCE OF INTERFACE DEFECTS ON ULTRASONIC REFLECTION/TRANSMISSION CHARACTERISTICS OF THICK ADHESIVE LAYER COMPOSITE BONDING STRUCTURE" . (2021) : 353-357 . |
| APA | Liu, Bing , Wu, Bin , Lyu, Yan , Song, Guo-rong , Song, Xie-hong , He, Cun-fu . INFLUENCE OF INTERFACE DEFECTS ON ULTRASONIC REFLECTION/TRANSMISSION CHARACTERISTICS OF THICK ADHESIVE LAYER COMPOSITE BONDING STRUCTURE . (2021) : 353-357 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Based on the principle of ultrasonic testing, the non-contact ultrasonic time-domain simulation testing method was developed for the debonding and weak bonding defects of composite structures. Firstly, the time-domain simulation model of the ultrasonic transmission characteristics of single-layer CFRP (carbon fiber reinforced polymer) plate is established, and the frequency spectrum of the transmission coefficient is obtained. By comparing with the plane wave theory, the results show that the simulation results are in good agreement with the theoretical calculation. Then, the ultrasonic transmission coefficient of single / double interface weakening and cohesive weakening in composite bonding structure is simulated. The simulation results show that with the decrease of interface stiffness and the deepening of cohesion weakening, the local extreme points in the transmission coefficient spectrum tend to shift to the low frequency side, and the offset of the extreme points caused by the decrease of spring stiffness is different at different frequency points.
关键词 ：
weak bonding weak bonding composite material composite material time domain simulation time domain simulation ultrasonic transmission ultrasonic transmission Bonding structure Bonding structure
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| GB/T 7714 | Song, Xie-hong , Song, Guo-rang , Lyu, Yan et al. TIME DOMAIN SIMULATION AND ANALYSIS OF COMPOSITE BONDED STRUCTURES BASED ON ULTRASONIC TRANSMISSION CHARACTERISTICS [C] . 2021 : 371-375 . |
| MLA | Song, Xie-hong et al. "TIME DOMAIN SIMULATION AND ANALYSIS OF COMPOSITE BONDED STRUCTURES BASED ON ULTRASONIC TRANSMISSION CHARACTERISTICS" . (2021) : 371-375 . |
| APA | Song, Xie-hong , Song, Guo-rang , Lyu, Yan , Liu, Bing , Wu, Bin , He, Cun-fu . TIME DOMAIN SIMULATION AND ANALYSIS OF COMPOSITE BONDED STRUCTURES BASED ON ULTRASONIC TRANSMISSION CHARACTERISTICS . (2021) : 371-375 . |
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摘要 ：
The internal state information of lithium-ion batteries, such as lithium-plating, state of charge, etc., which can be reflected by the internal structure of the battery and its mechanical properties. During the battery charging process, the Young's modulus, density and porosity of the internal electrode materials will change. Ultrasonic non-destructive testing can be used to characterize the internal state of the battery and obtain the relationship between wave propagation information and internal state. This study describes in detail the reflection/transmission characteristics of ultrasound in lithium-ion batteries. Based on the working principle of lithium-ion battery, the porosity in the electrode of the lithium-ion battery is considered by Biot theory, and the reflection/transmission coefficient of the single cell is solved by the the transfer matrix method. As the thickness of the lithium plating layer increases, the angle spectrum and the frequency spectrum show regular movement, which makes it possible to further characterize the thickness of the lithium plating layer. The results obtained by the finite element simulation are highly consistent with the theoretical calculation method, which further verifies the feasibility of the method.
关键词 ：
Lithium-ion Battery Lithium-ion Battery Defect identification Defect identification Ultrasonic reflection/transmission characteristics Ultrasonic reflection/transmission characteristics
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| GB/T 7714 | Wang, Xiang-ling , Lyu, Yan , Song, Guo-rong et al. THEORETICAL ANALYSIS OF ULTRASONIC REFLECTION/TRASMISSION CHARACTERISTICS OF LITHIUM-ION BATTERY [C] . 2021 : 292-296 . |
| MLA | Wang, Xiang-ling et al. "THEORETICAL ANALYSIS OF ULTRASONIC REFLECTION/TRASMISSION CHARACTERISTICS OF LITHIUM-ION BATTERY" . (2021) : 292-296 . |
| APA | Wang, Xiang-ling , Lyu, Yan , Song, Guo-rong , Zhang, Liang-heng , He, Cun-fu . THEORETICAL ANALYSIS OF ULTRASONIC REFLECTION/TRASMISSION CHARACTERISTICS OF LITHIUM-ION BATTERY . (2021) : 292-296 . |
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摘要 ：
Since the permeability of ferromagnetic materials is sensitive to the stress changes, it is feasible to acquire the stress level through detecting the change in permeability. In this study, to explore the distribution of stress or residual stress along the depth direction, a multi-layer model was established and a new inversion algorithm was proposed; and the hypothesis of uniformity of the material's physical properties for each layer was introduced. Under laboratory conditions, the four-point bending experiment was then implemented with a sample of 45# steel. Global Fourier series fitting based on the least-squares method was used for signal process. The amplitude ratio of the induced voltage to the excitation current was extracted. The effective permeability and the associated hysteresis angle at the 0.25 mm deflection were calculated and presented good regular variations. Finally, under the 0.25 mm deflection, the effective permeability change along the depth was obtained, and the inversely fitted curve was consistent with the theoretical curve. It is verified that the sensor has good robustness by adding deviation of the detection depth. Thereby, it is feasible to test stress or residual stress as a function of depth by multi-frequency eddy current (EC) method.
关键词 ：
multi-layer material model multi-layer material model Effective permeability Effective permeability multi-frequency eddy current (EC) method multi-frequency eddy current (EC) method stress profiles in depth stress profiles in depth
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| GB/T 7714 | Di, Jingyu , He, Cunfu , Lee, Yung-Chun et al. Application of a New Inversion Algorithm Based on Multi-Layer Model Hypothesis for Testing Stress-Depth Profiles by Multi-Frequency EC Method [J]. | IEEE TRANSACTIONS ON MAGNETICS , 2021 , 57 (5) . |
| MLA | Di, Jingyu et al. "Application of a New Inversion Algorithm Based on Multi-Layer Model Hypothesis for Testing Stress-Depth Profiles by Multi-Frequency EC Method" . | IEEE TRANSACTIONS ON MAGNETICS 57 . 5 (2021) . |
| APA | Di, Jingyu , He, Cunfu , Lee, Yung-Chun , Liu, Xiucheng , Shang, Wanli . Application of a New Inversion Algorithm Based on Multi-Layer Model Hypothesis for Testing Stress-Depth Profiles by Multi-Frequency EC Method . | IEEE TRANSACTIONS ON MAGNETICS , 2021 , 57 (5) . |
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