Documents disponibles écrits par cet auteur

Stochastic dynamic analysis of inelastic structures using force analogy method / Zhe Wang in Journal of engineering mechanics, Vol. 133 N°4 (Avril 2007) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 133 N°4 (Avril 2007) . - pp.414–421. Titre : Stochastic dynamic analysis of inelastic structures using force analogy method Type de document : texte imprimé Auteurs : Zhe Wang, Auteur ; Kevin K. Wong, Auteur Année de publication : 2007 Article en page(s) : pp.414–421. Note générale : Applied mechanics Langues : Anglais (eng) Mots-clés : Inelastic  action  Dynamic  analysis  Structural  analysis  Rotation  Monte  Carlo  method Résumé : The force analogy method which has been proven to be very efficient in dynamic analysis of inelastic structures is here introduced for the first time into the field of stochastic dynamic analysis for inelastic structures. This stochastic force analogy method (SFAM) maintains the advantage of the high efficiency in the numerical computation of the force analogy method in dynamic analysis. According to the SFAM, the variance covariance functions of inelastic dynamic responses, such as displacement, velocity, inelastic displacement of the entire moment-resisting framed structures, and plastic rotation at individual plastic hinge location, can be produced for structures subject to random excitation. Detailed theoretical development of the SFAM is derived, and a simple numerical example using a single degree of freedom system is presented. The reasonability of the proposed method is validated by the good agreement between the results from the proposed SFAM and those obtained from Monte Carlo simulation. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-9399%282007%29133%3A4%2841 [...] [article] Stochastic dynamic analysis of inelastic structures using force analogy method [texte imprimé] / Zhe Wang, Auteur ; Kevin K. Wong, Auteur . - 2007 . - pp.414–421. Applied mechanics Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 133 N°4 (Avril 2007) . - pp.414–421. Mots-clés : Inelastic  action  Dynamic  analysis  Structural  analysis  Rotation  Monte  Carlo  method Résumé : The force analogy method which has been proven to be very efficient in dynamic analysis of inelastic structures is here introduced for the first time into the field of stochastic dynamic analysis for inelastic structures. This stochastic force analogy method (SFAM) maintains the advantage of the high efficiency in the numerical computation of the force analogy method in dynamic analysis. According to the SFAM, the variance covariance functions of inelastic dynamic responses, such as displacement, velocity, inelastic displacement of the entire moment-resisting framed structures, and plastic rotation at individual plastic hinge location, can be produced for structures subject to random excitation. Detailed theoretical development of the SFAM is derived, and a simple numerical example using a single degree of freedom system is presented. The reasonability of the proposed method is validated by the good agreement between the results from the proposed SFAM and those obtained from Monte Carlo simulation. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-9399%282007%29133%3A4%2841 [...]

Temperature measurements of diesel fuel combustion with multicolor pyrometry / Tairan Fu in Journal of heat transfer, Vol. 132 N° 5 (Mai 2010) 

Public ISBD [article]  in Journal of heat transfer > Vol. 132 N° 5 (Mai 2010) . - pp. [051602-1/7] Titre : Temperature measurements of diesel fuel combustion with multicolor pyrometry Type de document : texte imprimé Auteurs : Tairan Fu, Auteur ; Zhe Wang, Auteur ; Xiaofang Cheng, Auteur Article en page(s) : pp. [051602-1/7] Note générale : Physique Langues : Anglais (eng) Mots-clés : Temperature  pyrometry  Optical  diagnostics  Diesel  combustion  flame Index. décimale : 536 Chaleur. Thermodynamique Résumé : Optical diagnostics techniques to measure diesel combustion flame temperatures are useful for evaluation and control of combustion processes. In this paper, diesel combustion flame temperatures are measured based on a multicolor pyrometry method respectively adopting an optical fiber spectrometer and a color charge coupled device (CCD). The intensity ratios for various wavelengths/wavebands are utilized as the analytical variables to deduce the temperatures to avoid the need to calibrate each system for the specific geometry conditions. The measured multicolor data can determine the temperature T and the soot factor KL. Extra data collected at many wavelengths is used to reduce the noise and random fluctuations in the measurements. To improve the solving precision, a data-processing method based on the least-squares technique is proposed to fit the data for approximate solutions. Verification experiments using the multicolor pyrometry were conducted in a 54–120 kW test furnace with diesel fuel. Data for 16 wavelengths detected by a fiber optic spectrometer from a diesel flame is analyzed to determine how to choose a suitable combination of three wavelengths for three-color pyrometry. The CCD-based three-color measurements, which would be much more practical in field measurements, are compared with the spectrometer-based results. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&smode=strresults& [...] [article] Temperature measurements of diesel fuel combustion with multicolor pyrometry [texte imprimé] / Tairan Fu, Auteur ; Zhe Wang, Auteur ; Xiaofang Cheng, Auteur . - pp. [051602-1/7]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 132 N° 5 (Mai 2010) . - pp. [051602-1/7] Mots-clés : Temperature  pyrometry  Optical  diagnostics  Diesel  combustion  flame Index. décimale : 536 Chaleur. Thermodynamique Résumé : Optical diagnostics techniques to measure diesel combustion flame temperatures are useful for evaluation and control of combustion processes. In this paper, diesel combustion flame temperatures are measured based on a multicolor pyrometry method respectively adopting an optical fiber spectrometer and a color charge coupled device (CCD). The intensity ratios for various wavelengths/wavebands are utilized as the analytical variables to deduce the temperatures to avoid the need to calibrate each system for the specific geometry conditions. The measured multicolor data can determine the temperature T and the soot factor KL. Extra data collected at many wavelengths is used to reduce the noise and random fluctuations in the measurements. To improve the solving precision, a data-processing method based on the least-squares technique is proposed to fit the data for approximate solutions. Verification experiments using the multicolor pyrometry were conducted in a 54–120 kW test furnace with diesel fuel. Data for 16 wavelengths detected by a fiber optic spectrometer from a diesel flame is analyzed to determine how to choose a suitable combination of three wavelengths for three-color pyrometry. The CCD-based three-color measurements, which would be much more practical in field measurements, are compared with the spectrometer-based results. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&smode=strresults& [...]