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[1]王晓璐,杨建林,王翠红,等.周期性传热条件下混凝土空心砌块的热流信号EMD分析[J].南京工业大学学报(自然科学版),2020,42(05):656-662.[doi:10.3969/j.issn.1671-7627.2020.05.015]
 WANG Xiaolu,YANG Jianlin,WANG Cuihong,et al.EMD analysis of heat flux signal on periodic heat transfer of concrete hollow block[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2020,42(05):656-662.[doi:10.3969/j.issn.1671-7627.2020.05.015]
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周期性传热条件下混凝土空心砌块的热流信号EMD分析()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
42
期数:
2020年05期
页码:
656-662
栏目:
出版日期:
2020-09-20

文章信息/Info

Title:
EMD analysis of heat flux signal on periodic heat transfer of concrete hollow block
文章编号:
1671-7627(2020)05-0656-07
作者:
王晓璐1杨建林2王翠红1吴恩1徐雷1
1.金陵科技学院 机电工程学院,江苏 南京 211169; 2.南京航空航天大学 航空学院,江苏 南京 210016
Author(s):
WANG Xiaolu1 YANG Jianlin2 WANG Cuihong1 WU En1 Xu Lei1
1. School of Mechanical and Electrical Engineering, Jinling Institute of Technology, Nanjing 211169,China; 2. College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
关键词:
周期性非稳态传热 热流谐波 经验模态分解(EMD) 混凝土空心砌块 本征模态函数(IMF) 希尔伯特-黄变换算法(HHT)
Keywords:
periodic unsteady heat transfer heat flux harmonics empirical mode decomposition(EMD) concrete hollow block intrinsic modal function(IMF) Hilbert-Huang transform algorithm(HHT)
分类号:
TU11.193
DOI:
10.3969/j.issn.1671-7627.2020.05.015
文献标志码:
A
摘要:
为探索新型信号分析技术在建筑墙体夏季传热过程中热流信号处理时的应用,本文在对混凝土加腋锥式肋块型空心砌块墙体进行周期性非稳态传热数值计算的基础上,利用在时域具有高分辨率的希尔伯特-黄变换算法(HHT)对墙体输入、输出热流进行经验模态分解(EMD)计算。结果表明:东、南、西、北朝向建筑墙体外表面输入热流的本征模态函数(IMF)中的第5、6(7)阶IMF已经基本奠定了信号函数的主导波形,各朝向热流波形有明显区别,第3、4阶IMF是对第5、6(7)阶信号的局部修正; 各朝向建筑墙体内表面热流的IMF数量只有4~5阶,最后1~2阶与残差项之和就足以精确拟合原始信号; 与傅里叶变换方法对比,EMD分解墙体热流谐波信号具有分解阶数较少、趋势项清晰、拟合精度高的优势。
Abstract:
To explore the application of new signal analysis technology in the heat transfer process of wall heat flux signal processing in summer, the periodic unsteady heat transfer numerical calculation of concrete hollow block wall with axillary conical brick was carried out. Hilbert-Huang transform algorithm(HHT)with high resolution in time domain was used to decompose the input and output heat flow of the wall by empirical mode decomposition(EMD). Results showed that order 5, 6(7)of the intrinsic modal function(IMF)of heat flow input to the outer surface of the building wall from east, south, west and north basically laid the dominant waveforms of the signal function. The waveforms of heat flow in each direction were obviously different. 3,4 order were the partial correction of the 5, 6(7)order signal. The number of IMF of heat flow on the inner surface of building walls in all directions was only 4-5 order. The sum of the last 1-2 and the residual were sufficient to be accurate to the original signal. In contrast to the Fourier transform method, EMD decomposition of wall thermal harmonic signal always had the advantages of less decomposition order, clear change trend and high fitting accuracy.

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备注/Memo

备注/Memo:
收稿日期:2018-12-20
基金项目:江苏省自然科学基金(BK2015-1099)
作者简介:王晓璐(1959—),女,教授,E-mail:1215960123@qq.com.
引用格式:王晓璐,杨建林,王翠红,等.周期性传热条件下混凝土空心砌块的热流信号EMD分析[J].南京工业大学学报(自然科学版),2020,42(5):656-662.
WANG Xiaolu, YANG Jianlin, WANG Cuihong, et al. EMD analysis of heat flux signal on periodic heat transfer of concrete hollow block[J].Journal of Nanjing Tech University(Natural Science Edition),2020,42(5):656-662..
更新日期/Last Update: 2020-09-24