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Numerical Analysis of Fiber Reinforced Polymer-Confined Concrete under Cyclic Compression Using Cohesive Zone Models

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Structural Durability & Health Monitoring 2024年第5期18卷 599-622页

作者： Mingxu Zhang mingliang Wang wei Zhang China Communications Construction Rail Transit Subsidiary Bejing100000China China Communications Construction Company Limited Beijing100000China School of Civil Engineering Fujian University of TechnologyFuzhou350118China

This paper examines the mechanical behavior ofﬁber reinforced polymer(FRP)-conﬁned concrete under cyclic compression using the 3D cohesive zone model(CZM).A numerical modeling method was developed,employing zero-thickness cohesive elements to represent the stress-displacement relationship of concrete potential fracture surfaces and FRP-concrete ***,mixed-mode damage plastic constitutive models were pro-posed for the concrete potential fracture surfaces and FRP-concrete interface,considering interfacial ***,an anisotropic plastic constitutive model was developed for the FRP composite *** CZM model proposed in this study was validated using experimental data from plain concrete and large rupture strain(LRS)FRP-conﬁned concrete subjected to cyclic *** simulation results demonstrate that the pro-posed model accurately predicts the mechanical response of both concrete and FRP-conﬁned concrete under cyc-lic ***,various parametric studies were conducted to investigate the internal failure mechanism of FRP-conﬁned concrete under cyclic loading to analyze the inﬂuence of the inner friction plasticity of different components.

关键词： Cyclic compression CZM FRP wrapped concrete constitutive model fracture behavior

Modeling of Soot Formation in Gas Burner Using Reduced Chemical Kinetics Coupled with CFD Code

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Chinese Journal of Chemical Engineering 2010年第6期18卷 967-978页

作者： ZHANG Yindi ZHOU Huaichun XIE mingliang FANG Qingyan wei Yan State Key Laboratory of Coal Combustion Huazhong University of Science and Technology Wuhan 430074 China

A computational study of soot formation in ethylene/air coflow jet diffusion flame at atmospheric pres-sure was conducted using a reduced mechanism and soot formation model. A 20-step mechanism was derived from the full mechanism using sensitivity analysis,reaction path analysis and quasi steady state(QSS) approximation. The model in premixed flame was validated and with computing savings in diffusion flame was applied by incor-porating into a CFD code. Simulations were performed to explore the effect of coflow air on flame structure and soot formation. Thermal radiation was calculated by a discrete-ordinates method,and soot formation was predicted by a simple two-equation soot model. Model results are in good agreement with those from experiment data and detailed mechanism at atmospheric conditions. The soot nucleation,growth,and oxidation by OH are all enhanced by decrease in coflow air velocity. The peak soot volume fraction region appears in the lower annular region be-tween the peak flame temperature and peak acetylene concentration locations,and the high soot oxidation rate due to the OH attack occurs in the middle annular region because of high temperature.

关键词： modeling chemical kinetics sensitivity analysis soot formation

基于氨存储模型的SCR系统尿素喷射控制策略研究

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拖拉机与农用运输车 2024年第4期51卷 60-63页

作者：李明建胡友耀刘西文刘庆伟黄银龙魏明亮智能农业动力装备全国重点实验室河南洛阳471039 洛阳拖拉机研究所有限公司河南洛阳471039

以某型号6缸高压共轨柴油机为研究对象,开发了一种基于氨存储模型的SCR系统尿素喷射控制策略。通过氨存储量对目标转化效率和尿素喷射量的修正,实现了尿素喷射量的精准控制。试验结果表明:台架试验稳态循环NO_(x)排放1.132 g/(kW·h),... 详细信息

以某型号6缸高压共轨柴油机为研究对象,开发了一种基于氨存储模型的SCR系统尿素喷射控制策略。通过氨存储量对目标转化效率和尿素喷射量的修正,实现了尿素喷射量的精准控制。试验结果表明:台架试验稳态循环NO_(x)排放1.132 g/(kW·h),瞬态循环NO_(x)排放1.639 g/(kW·h),均低于非道路国四阶段法规要求;同时,该控制策略的尿燃比达到了5.56%,相比于开环控制,提高了经济性,有效地降低了尿素结晶的风险。

关键词：尿素喷射氨存储 SCR系统控制策略

SCR催化器失效故障诊断和容错控制方法研究

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拖拉机与农用运输车 2024年第5期51卷 35-37,42页

作者：李明建胡友耀黄银龙刘西文刘庆伟魏明亮智能农业动力装备全国重点实验室河南洛阳471039 洛阳拖拉机研究所有限公司河南洛阳471039

针对SCR催化器由于老化、硫中毒等因素出现的失效故障,基于转化效率对其进行故障评估,并引入了一种失效因子,用来表征SCR催化器的失效程度。在此基础上,对不同工况下的尿素喷射量进行修正,以保证尾气排放符合OBD限值要求。最后,以某型号... 详细信息

针对SCR催化器由于老化、硫中毒等因素出现的失效故障,基于转化效率对其进行故障评估,并引入了一种失效因子,用来表征SCR催化器的失效程度。在此基础上,对不同工况下的尿素喷射量进行修正,以保证尾气排放符合OBD限值要求。最后,以某型号6缸高压共轨柴油机为对象,加装已经部分老化失效的后处理系统进行台架验证。试验结果表明:通过失效因子修正后,稳态循环工况下,发动机尾气排放为1.4 g/(kW·h),瞬态循环工况下,排放为1.77 g/(kW·h),与催化器失效前的值基本相当,均低于非道路国四阶段法规要求,有效地降低了催化器失效对SCR系统造成的负面影响。

关键词： SCR系统尿素喷射故障诊断容错控制

Study on Mature Age of An Individual Pinus thunbergii Parl

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Agricultural Biotechnology 2018年第5期7卷 156-158页

作者： Kehua WANG Hongbo QIAO Xingyun GAO wei ZHANG mingliang wei Fengzhen WANG Xueqiang ZHANG Forestry Survey and Planning Institute of Shandong Province Jinan 250014China

Through the study of parse wood materials, the fitting empirical equation of tree growth was obtained, a function with tree growth as a variable and time as an independent variable. Through mathematical operations such as function derivation, the mature age of tree growth was obtained. The obtained maturity age for the actual forest of Pinus thunbergii Parl was 51 a, and the ideal mature age was 66 a. And the application, research directions and precautions of the mature ages were proposed.

关键词： Mature age Empirical equation Parse wood

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外事之窗

重庆与世界 2019年第2期 64-67页

作者： wei mingliang

2019外国领事馆新春工作联谊会在渝举行1月31日,由重庆市人民政府外事办公室、渝中区人民政府共同举办的"相约重庆·合作共赢—2019外国领事馆新春工作联谊会"在渝举行。匈牙利、英国、日本、加拿大、意大利、菲律宾、荷兰、埃塞俄比亚... 详细信息

2019外国领事馆新春工作联谊会在渝举行1月31日,由重庆市人民政府外事办公室、渝中区人民政府共同举办的"相约重庆·合作共赢—2019外国领事馆新春工作联谊会"在渝举行。匈牙利、英国、日本、加拿大、意大利、菲律宾、荷兰、埃塞俄比亚、丹麦、柬埔寨、波兰、法国、瑞士、德国、以色列、奥地利、新加坡、澳大利亚等18国驻渝蓉领事官员及家属、工作人员,部分在渝外国机构、企业负责人约260人出席了联谊会。市政协副主席张玲、市政府外办主

关键词：重庆市加拿大俄罗斯人文交流

Discussion on Individual Expected Maturity of Populus canadensis Moench

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Agricultural Biotechnology 2018年第5期7卷 168-170页

作者： Xingyun GAO mingliang wei Kehua WANG Hongbo QIAO Dequan ZHANG Dejin DONG Forestry Survey and Planning Institute of Shandong Province Jinan 250014China

Through the study of parse wood materials in Shandong Province, the fitting empirical equation of tree growth was obtained, a function with tree growth was a variable and time as an independent variable. Through mathematical operations such as function derivation, the mature age of tree growth was obtained. The obtained expected maturity age for Populus canadensis Moench forest was 11 a for pulp material, 26 a for pillar materials and 41 a for peeler. And the application, research directions and precautions of the mature ages were proposed.

关键词： Expected maturity age Empirical equation Parse wood

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一览

重庆与世界 2018年第11期 14-17页

作者： wei mingliang

"回望百年—大足石刻历史影像展"将赴国内外多地巡展5月26日,"回望百年—大足石刻历史影像展"在重庆中国三峡博物馆开展,拉开大足石刻百场展览、百场讲座、百馆赠书、百集微视频展播—"四百工程"主题文化旅游推广宣传活动帷幕,并将选择... 详细信息

"回望百年—大足石刻历史影像展"将赴国内外多地巡展5月26日,"回望百年—大足石刻历史影像展"在重庆中国三峡博物馆开展,拉开大足石刻百场展览、百场讲座、百馆赠书、百集微视频展播—"四百工程"主题文化旅游推广宣传活动帷幕,并将选择在不同的国家和城市举行。在国外,拟选择美国、英国、法国、德国、加拿大、意大利、西班牙、日本等大足石刻参观客源相对较多的国家。国内按城市分,既要选择北京、上海、广州、成都等大城市,也要选择中小城市。按线路分,重点选择"一带一路"沿线国家和城市。

关键词：欧美同学会河南卫视历史影像大足石刻制作技艺

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外侨之窗

重庆与世界 2018年第17期 68-69页

作者： wei mingliang

新加坡驻成都总领事馆在渝举办国庆招待会8月3日,新加坡驻成都总领事馆在重庆举行新加坡国庆招待会。重庆市副市长刘桂平出席并致辞。市政府外事侨务办主任吴康明、中新示范项目管理局局长韩宝昌,匈牙利、英国、日本、荷兰、菲律宾等5... 详细信息

新加坡驻成都总领事馆在渝举办国庆招待会8月3日,新加坡驻成都总领事馆在重庆举行新加坡国庆招待会。重庆市副市长刘桂平出席并致辞。市政府外事侨务办主任吴康明、中新示范项目管理局局长韩宝昌,匈牙利、英国、日本、荷兰、菲律宾等5国驻渝总领事,以及各界嘉宾共200余人参加。

关键词：新加坡居民身份证亲子游安徒生童话国庆招待会居住证欧登塞香港特区政府夏令营乌拉圭