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2. 基于物理信息神经网络的激光超声波场研究.

Author

颜 鑫, 应恺宁, 戴鹭楠, 谭钧夫, 沈中华, and 倪辰荫

Abstract

Copyright of Laser Technology is the property of Gai Kan Bian Wei Hui and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2024
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7. 激光与外载荷联合加载 7075 铝合金的实验研究.

Author

陈伊铭, 李泽文, 唐杰, and 沈中华

Abstract

Copyright of Laser Technology is the property of Gai Kan Bian Wei Hui and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2023
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8. 基于ANSYS软件的工程机械轮胎后充气装置机架的 轻量化研究.

Author

廖桂松, 沈中华, 曹卫华, and 丛静波

Abstract

Copyright of China Rubber Industry is the property of Editorial Office of China Rubber Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2023
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11. 脉冲红外热波用于半透明涂层厚度测量

Author

何涛 He Tao, 沈中华 Shen Zhonghua, 陈飞 Chen Fei, and 陈力 Chen Li

Subjects
Space and Planetary Science, Aerospace Engineering, Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics
Published
2022

14. Photoacoustic Nonlinearity of Microcracks Under Different Contact States

Author

张逸飞 Zhang Yifei, 袁玲 Yuan Ling, 倪辰荫 Ni Chenyin, 沈中华 Shen Zhonghua, and 陆建 Lu Jian

Subjects
Contact states, Nonlinear system, Materials science, Condensed matter physics, Photoacoustic imaging in biomedicine, Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics
Published
2021

20. Influence of Temperature on Zero-Group-Velocity Lamb Waves of Thin Plate

Author

袁玲 Yuan Ling, 倪辰荫 Ni Chenyin, 许薇 Xu Wei, 沈中华 Shen Zhonghua, and 阚威威 Kan Weiwei

Subjects
Physics, Lamb waves, Quantum electrodynamics, Zero (complex analysis), Group velocity, Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Published
2019

21. Laser Ultrasonic Real-Time Monitoring of Photothermal Modulation Crack Closure

Author

倪辰荫 Ni Chenyin, 尤博文 You Bowen, and 沈中华 Shen Zhonghua

Subjects
Materials science, business.industry, Photothermal therapy, Laser, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention, Crack closure, Optics, law, Modulation, Ultrasonic sensor, Electrical and Electronic Engineering, business
Published
2019

22. Research on laser-induced damage of K9 glass irradiated by millisecond laser

Author

沈中华 Shen Zhonghua, 潘云香 Pan Yunxiang, 吴朱洁 Wu Zhujie, 陆 健 Lu Jian, 倪晓武 Ni Xiaowu, and 赵竞元 Zhao Jingyuan

Subjects
Millisecond, Materials science, Space and Planetary Science, law, business.industry, Aerospace Engineering, Optoelectronics, Irradiation, Electrical and Electronic Engineering, Laser, business, Atomic and Molecular Physics, and Optics, law.invention
Published
2019

23. Experimental Study on Simulated Crack Closure Using Laser Ultrasonic

Author

倪辰荫 Ni Chenyin, 沈中华 Shen Zhonghua, and 郑杰 Zheng Jie

Subjects
Crack closure, Materials science, law, Ultrasonic sensor, Composite material, Laser, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention
Published
2019

27. Influence of bubble content on spectrum properties of laser-induced cavitation bubble collapse sound waves in liquid

Author

宗思光 Zong Siguang, 沈中华 Shen Zhonghua, 刘晓然 Liu Xiaoran, 倪晓武 Ni Xiaowu, 李胜勇 Li Shengyong, and 王江安 Wang Jiang’an

Subjects
Materials science, law, Bubble, Acoustics, Collapse (topology), Electrical and Electronic Engineering, Laser, Atomic and Molecular Physics, and Optics, Sound wave, Cavitation bubble, law.invention, Sonochemistry
Published
2012

28. Analysis and experiment on millisecond pulsed laser drilling of metals

Author

秦渊 Qin Yuan, 毕娟 Bi Juan, 张喜和 Zhang Xi-he, 倪晓武 Ni Xiaowu, and 沈中华 Shen Zhonghua

Subjects
Millisecond, Materials science, business.industry, chemistry.chemical_element, Drilling, Thermal conduction, Laser, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Pulsed laser deposition, law.invention, Optics, chemistry, Aluminium, law, business, Beam (structure), Laser drilling
Abstract

With the purpose of investigating the millimeter order hole's formation and the drilling speed drilled by a single millisecond pulse laser,the shapes of holes in an aluminium slab drilled by a Nd: YAG Gaussian laser with 1 ms pulse width were obtained with the cutting method in an experiment.The hole depth is 1.849 mm and 2.975 mm when the laser energy is 7.9 J and 28.9 J,respectively.A semi-infinite axisymmetric model was established according to the experiment and the analytical solution of temperature in a solid phase was derived based on the thermal conduction equation.Meanwhile,by assuming that material was removed from the hole once it was melted,the function describing the hole's shape was obtained with the energy balance theory.It was found that the difference between the calculation and the experimental results becomes larger as well as the hole's depth increases with the increase of laser energy.Further investigation indicates that the variation of beam radius affects the hole's depth greatly under other unaltered conditions.Thus,the defocusing effect was induced to modify the analytical solution and obtained results are in agreemeat well with those of the experiments.Finally,the drilling speed of millisecond pulsed laser for aluminum,copper,silver and titanium were studied.The results show that drilling speed for titanium is the fastest one due to its high absorptivity for laser and poor heat conduction ability.

Published
2011

29. Inspection of Material Internal Defects Using Double Shadow Method Based on Laser Ultrasonic Reflected Shear Waves

Author

李建文 Li Jianwen, 沈中华 Shen Zhonghua, 王增勇 Wang Zengyong, 孙朝明 Sun Chaoming, 孙凯华 Sun Kaihua, and 李远林 Li Yuanlin

Subjects
Shear waves, Optics, Materials science, law, business.industry, Shadow, Ultrasonic sensor, Electrical and Electronic Engineering, Laser, business, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention
Published
2018

30. Laser-Ultrasonic Non-Destructive Detection Based on Synthetic Aperture Focusing Technique

Author

倪辰荫 Ni Chenyin, 沈中华 Shen Zhonghua, 袁玲 Yuan Ling, 李俊燕 Li Junyan, and 倪晓武 Ni Xiaowu

Subjects
Optics, Materials science, business.industry, law, Non destructive, Synthetic aperture focusing, Ultrasonic sensor, Electrical and Electronic Engineering, business, Laser, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention
Published
2018

31. Properties Investigation of Laser-induced Plasma Sound Waves in Liquids

Author

李胜勇 Li Shengyong, 倪晓武 Ni Xiaowu, 饶德虎 Rao De-hu, and 沈中华 Shen Zhonghua

Subjects
Absorption (acoustics), Materials science, business.industry, Acoustics, Acoustic interferometer, Physics::Optics, Acoustic wave, Ion acoustic wave, Sound power, Atomic and Molecular Physics, and Optics, Parametric array, Wavelength, symbols.namesake, Optics, symbols, Physics::Atomic Physics, Rayleigh wave, business
Abstract

By the piezoelectric transducer hydrophone,laser-induced plasma sound waves in liquids were measured through experiments.Wavelet transform was applied to analyze the spectra characteristics of these signals acquired at different laser energy,different metal solid boundary and different laser wavelength.The results show that laser-induced plasma sound waves frequency range is 0~150 kHz,and changes of the laser energy,the metalboundary underwater and the laser wavelength have little effect on distribution of frequency of waves.Most energy of plasma sound waves is concentrated at the a6 level,and the proportion of the whole energy decreases with the increase of ionization energy of metal.The main frequency of sound waves is within 0~10 kHz,and the frequency peak is 5 kHz.

Published
2010

32. Experimental Study of Laser-Generated Surface Acoustic Waves in Laser Shock Hardening Metals

Author

任旭东 Ren Xudong, 沈中华 Shen Zhonghua, 严刚 Yan Gang, 袁玲 Yuan Ling, 陆建 Lu Jian, 张永康 Zhang Yongkang, and 倪晓武 Ni Xiaowu

Subjects
Physical acoustics, Surface (mathematics), Materials science, law, Shock hardening, Acoustics, Acoustic wave, Electrical and Electronic Engineering, Laser, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention
Published
2008

33. Welding Stress Measurement Using Laser-Generated Rayleigh Waves in Aluminum Alloys

Author

倪晓武 Ni Xiaowu, 沈中华 Shen Zhonghua, 石一飞 Shi Yifei, and 陆建 Lu Jian

Subjects
Materials science, chemistry.chemical_element, Stress measurement, Welding, Laser, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention, symbols.namesake, chemistry, law, Aluminium, symbols, Electrical and Electronic Engineering, Rayleigh wave, Composite material
Published
2008

36. Three-dimensional simulation of plasma stealth for cylindrical inlet

Author

沈中华ShenZhonghua, 倪晓武NiXiaowu, 张亚春ZhangYachun, 何湘HeXiang, 陈建平ChenJianping, and 陈宏晴ChenHongqing

Subjects
geography, Three dimensional simulation, Materials science, geography.geographical_feature_category, Plasma stealth, Mechanics, Electrical and Electronic Engineering, Inlet, Atomic and Molecular Physics, and Optics
Published
2015

38. 甘蔗切割器螺旋提升机构输送性能分析与改进.

Author

李尚平, 邓 雄, 叶才福, 王海波, and 沈中华

Abstract

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2016
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45. 激光超声技术用于研究楔形波及其模态的转变

Author

袁玲 Ling Yuan, 沈中华 Zhonghua Shen, 王丽娟 Lijuan Wang, and 贾静 Jing Jia

Subjects
Optics, Materials science, business.industry, Electrical and Electronic Engineering, business, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Published
2011

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