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基于声发射信号衰减特性的材料成分分数检测

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成果类型:
期刊论文
作者:
王向红;向建军;胡宏伟;谢炜;毛汉领
通讯作者:
Wang, Xianghong
作者机构:
[向建军; 王向红; 谢炜; 胡宏伟] Hunan Province Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle, Changsha University of Science and Technology, Changsha, China
[毛汉领] School of Mechanical Engineering, Guangxi University, Nanning, China
[王向红] Key Laboratory of Lightweight and Reliability Technology for Engineering Vehicle, College of Hunan Province, Changsha University of Science and Technology, Changsha, China
[王向红] Key Laboratory of Efficient &, Clean Energy Utilization, the Education Department of Hunan Province, Changsha University of Science &, Technology, Changsha, China
通讯机构:
Hunan Province Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle, Changsha University of Science and Technology, Changsha, China
语种:
中文
关键词:
衰减特性;材料成分分数;声发射;无损检测
关键词(英文):
Acoustic emission;Attenuation characteristic;Material composition fractions;Non-destructive testing
期刊:
仪器仪表学报
ISSN:
0254-3087
年:
2015
卷:
36
期:
2
页码:
453-458
基金类别:
51105045:国家自然科学基金 51205031:国家自然科学基金 51365006:国家自然科学基金 2015NGQ006:国家重点实验室基金 20114316120004:高等学校博士学科点专项科研基金
机构署名:
本校为第一且通讯机构
院系归属:
汽车与机械工程学院
能源与动力工程学院
摘要:
针对传统的材料成分分数检测方法需损坏被测材料这一问题,提出一种基于声发射信号衰减特性的材料成分分数检测新方法。选取微晶石墨 / 聚乙烯醇(PVA)复合材料为对象,从声发射原信号和声发射信号特征小波包两个方面,建立其衰减特性与材料成分分数间的关系,并对该关系进行验证和两方面的验证结果的对比。结果表明:本研究选取信号的特征小波包为125 ~ 171. 85 kHz 频段时,对于原矿微晶石墨 / PVA 复合材料以此特征小波包计算原矿微晶石墨质量分数误差为2. 2%,比用原信号计算误差低1. 6%;对于提纯微晶石墨 / PVA 复合材料以此特征小波包计算提纯微晶石墨质量分数误差为2. 4%,比用原信号计算误差低2....
摘要(英文):
Aimed at an issue that materials will be damaged using the traditional methods to detect their composition fractions, a new detection method based on attenuation characteristics of acoustic emission (AE) signals is provided in this study. Microcrystalline graphite fractions in the microcrystalline graphite/poly vinyl alcohol (PVA) composite materials were measured. Two relationships were established. One is the relationship between the attenuation coefficients of AE original signals and the microcrystalline graphite fractions. The other is the relationship between the attenuation coefficients ...

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