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基于流固耦合的错位桨搅拌假塑性流体模态分析

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石油化工设备技术 2019年第5期40卷 37-42页

作者：王宏王兆蕊王松松李龙斌栾德玉青岛科技大学机电工程学院

模态分析是指运动构件在正常工作时为避免发生共振现象而运用的一种分析方法。文章采用基于双向流固耦合的运算方法,对错位六弯叶桨(6PBT)在静模态和预应力模态下的固有频率和振型图进行对比分析。预应力模态分析在流变指数分别为n=0.9... 详细信息

模态分析是指运动构件在正常工作时为避免发生共振现象而运用的一种分析方法。文章采用基于双向流固耦合的运算方法,对错位六弯叶桨(6PBT)在静模态和预应力模态下的固有频率和振型图进行对比分析。预应力模态分析在流变指数分别为n=0.9、0.7和0.5的黄原胶溶液(一种比较典型的假塑性流体)中进行。结果表明:流体流变性对桨叶的振型分布和模态频率基本没有影响,在静模态和预应力模态下6PBT桨的振型分布相同,均表现为1~6阶为扭转振型,7~10阶为弯曲振型,桨叶的模态频率并未发生较大变化,说明搅拌介质与桨叶的相互耦合作用并没有对6PBT桨的模态造成很大影响。因此6PBT桨在搅拌不同流变指数的假塑性流体时,其固有频率和振型分布具有稳定性的特点,在很大程度上降低了搅拌桨在搅拌过程中出现共振现象的概率。

关键词：流固耦合错位六弯叶桨假塑性流体模态分析

Recent advances on monolithic perovskite-organic tandem solar cells

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Interdisciplinary Materials 2024年第1期3卷 113-132页

作者： Guanshui Xie Huan li longbin Qiu Shenzhen Key Laboratory of Intelligent Robotics and Flexible Manufacturing Systems Department of Mechanical and Energy EngineeringSUSTech Energy Institute for Carbon NeutralitySouthern University of Science and TechnologyShenzhenChina

Perovskite-organic tandem solar cells(TSCs)have emerged as a groundbreaking technology in the realm of photovoltaics,showcasing remarkable enhancements in efficiency and significant potential for practical ***-organic TSCs also exhibit facile fabrication surpassing that of all-perovskite or all-organic TSCs,attributing to the advantageous utilization of orthogonal solvents enabling sequential solution process for each *** perovskite-organic TSCs capitalize on the complementary light absorption characteristics of perovskite and organic *** is a promising prospect of achieving further enhanced power conversion efficiencies by covering a broad range of the solar spectrum with optimized perovskite absorber,organic semiconductors as well as the interconnecting layer's optical and electrical *** review comprehensively analyzes the recent advancements in perovskite-organic TSCs,highlighting the synergistic effects of combining perovskite with a low open-circuit voltage deficit,organic materials with broader light absorption,and interconnecting layers with reduced optical and electrical ***,the underlying device architecture design,regulation strategies,and key challenges facing the high performance of the perovskite-organic TSCs are also discussed.

关键词： interconnecting layer narrow‐bandgap organic solar cells recombination layer tandem solar cells wide‐bandgap perovskite solar cells

Diversity of As Metabolism Functional Genes in Pb-Zn Mine Tailings

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Pedosphere 2017年第3期27卷 630-637页

作者： li Xiaofang Philip L.BOND longbin HUANG Centre for Agricultural Resources Research Institute of Genetics and Developmental Biology Chinese Academy of Sciences Centre for Mined Land Rehabilitation Sustainable Minerals Institute The University of Queensland Advanced Water Management Centre The University of Queensland

Microbial activities impact arsenic （As） transformation in mine tailings substantially, yet little is understood on the functional diversity of As metabolism genes. This study explored this issue using a metagenomic approach coupled by a local BLASTN procedure established in our recent studies. An assembled metagenome, recovered from hypersaline and sulfidic mine tailings, was screened for As metabolism genes aioA, arrA, arsC and arsM. This was done using a local BLASTN procedure against databases of the As metabolism genes built in this study. Putative As metabolism genes detected in the assembled metagenome included 11 arsM, 20 arsC and 1 arrA full-length sequences. Together with the rRNA-based phylogenetic profiling results, a picture depicting microbial As cycling in the tailings to the genus level was obtained. It was found that most of the dominant genera in the tailings potentially harboured the genes for As reduction and/or methylation. In particular, a typical pyrite-eater present in the tailings, Thioalkalivibrio sp., was found to harbour not only arsC and arsM, but also arrA. These results highlight the unexpected diversity of As metabolism genes in the tailings, especially considering the extremely low species diversity therein. The microbial As cycling picture established here has potential use for guiding the purposeful manipulation of As biogeochemistry in the railings.

关键词： arsenic cycling arsM local BLASTN procedure metagenomics revegetation Thioalkalivibrio sp.

旋风分离器顶部出口加筋平盖应力分析与强度评定

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机械设计与制造工程 2020年第12期49卷 11-15页

作者：栾德玉李龙斌王松松王风磊郭祥忠李沂青岛科技大学机电工程学院山东青岛266061 青岛畅隆电力设备有限公司山东青岛266700

采用有限元分析软件ANSYS Workbench,对旋风分离器顶部平盖受力进行研究,分析比较了无筋板与设置三角形筋板和矩形筋板的应力分布和变形特征,通过线处理法对应力进行均匀化和当量线性化处理,依据标准JB 4732—1995进行应力分析与强度评... 详细信息

采用有限元分析软件ANSYS Workbench,对旋风分离器顶部平盖受力进行研究,分析比较了无筋板与设置三角形筋板和矩形筋板的应力分布和变形特征,通过线处理法对应力进行均匀化和当量线性化处理,依据标准JB 4732—1995进行应力分析与强度评定。分析结果表明:设置筋板后平盖的应力集中程度和变形量显著降低;在筋板厚度和面积相同的前提下,以矩形筋板和三角形筋板为例,改变筋板形状能将筋板等效应力降低27%、变形量降低35%,同时能降低薄膜应力和一次加二次应力,有效提高平盖的安全性,可为平盖设计提供参考和依据。

关键词：旋风分离器加筋平盖有限元应力分析强度评定

固定管板式换热器换热管焊接结构对拉脱力影响研究

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能源化工 2020年第6期41卷 62-67页

作者：李龙斌王松松王兆蕊石文昊栾德玉青岛科技大学机电工程学院山东青岛266061

利用ANSYS Workbench 16.0分析软件,对固定管板式换热器换热管拉脱力进行数值计算,在相同工况下,通过对管板堆焊与换热管材料相同的S30408不锈钢,比较换热管与管板直接焊接和换热管与堆焊层焊接2种结构换热管承受的拉脱力大小。计算结... 详细信息

利用ANSYS Workbench 16.0分析软件,对固定管板式换热器换热管拉脱力进行数值计算,在相同工况下,通过对管板堆焊与换热管材料相同的S30408不锈钢,比较换热管与管板直接焊接和换热管与堆焊层焊接2种结构换热管承受的拉脱力大小。计算结果表明:换热管与堆焊层焊接时,换热管承受的拉脱力比换热管与管板直接焊接时小18.42%,同时,换热管的总变形量降低了10.87%。从应力评定结果来看,换热管与管板直接焊接时,换热管承受的拉脱力超出许用范围,而换热管与堆焊层焊接结构换热管最大拉脱力仍符合要求,说明堆焊后换热管与堆焊层焊接的焊接方式可以明显改善焊缝处换热管的受力状况,降低换热器在使用过程中换热管被拉脱的风险。

关键词：换热管管板堆焊层拉脱力

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管箍式高压自紧密封结构的力学性能分析

能源化工 2020年第5期41卷 67-72页

作者：石文昊王松松李龙斌王兆蕊栾德玉青岛科技大学机电工程学院山东青岛266061

针对化工生产过程中高压管道连接的密封问题,设计了新型管箍式高压自紧密封结构,建立了三维模型,采用ANSYS Workbench分析软件,计算了在符合实际工况的流体压力作用下自紧密封结构的应力状态,并对结构部件的力学特性和密封性能进行了强... 详细信息

针对化工生产过程中高压管道连接的密封问题,设计了新型管箍式高压自紧密封结构,建立了三维模型,采用ANSYS Workbench分析软件,计算了在符合实际工况的流体压力作用下自紧密封结构的应力状态,并对结构部件的力学特性和密封性能进行了强度评定。结果表明:自紧密封结构与管道连接处应力最大,其应力满足强度要求,同时能够形成完整的密封区域,可实现零泄漏。研究结果对管箍式高压自紧密封结构在化工生产中的实际应用具有重要的参考意义。

关键词：自紧结构有限元分析高压应力分析强度评定

Radial Anisotropy in the Crust beneath the Northeastern Tibetan Plateau from Ambient Noise Tomography

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Journal of Earth Science 2015年第6期26卷 864-871页

作者： Jing Tan Hongyi li Xinfu li Ming Zhou longbin Ouyang Sanjian Sun Dan Zheng Key Laboratory of Geo-Detection Ministry of Education China University of Geosciences Geological Exploration Technologies Institute of Anhui Province School of Geophysics and Information Technology China University of Geosciences

Through analysis of Rayleigh wave and Love wave Green＇s functions estimated from ambient noise tomography, we obtain radial anisotropy and shear wave velocity structure beneath the northeastern Tibetan Plateau. With two hundred and twenty three broadband seismic stations deployed by China Earthquake Administration, a collaborative seismic experiment of northern Tibet（ACSENT） experiment and northeastern Tibet seismic（NETS） experiment provide the unprecedented opportunity to resolve the spatial distribution of the radial anisotropy within the crust of the northeastern Tibetan Plateau. Discrepancies between Love（sh） and Rayleigh（sv） wave velocities show complex anisotropic patterns associated with the dynamic processes of the collision between the Indian and Eurasian plates：（1） In the upper crust, V（sv）〉V（sh） anisotropy is dominant throughout the study area which probably reflects fossil microcracks induced by the uplift, folding and erosion geodynamic processes;（2） in the middle crust, V（sh）〉V（sv） observed beneath the Songpan-Ganzi terrane and the northwestern Qilian orogen correlates well with a mid-crustal low velocity zone（LVZ）;（3） at depths deeper than 40 km, V（sh）〉V（sv） is still found in the Songpan-Ganzi terrane. This anisotropy could be caused by the sub-horizontal alignment of anisotropic minerals that has followed the collision between India and Eurasia. However, the northwestern Qilian orogen is associated with V（sv）〉V（sh） anisotropy which may be related to the vertically aligned seismic anisotropic minerals caused by the crustal thickening.

关键词： northeastern Tibetan Plateau ambient noise tomography radial anisotropy.

The Origin of Paleokarst in the Huanglong Formation of the Eastern Sichuan Basin:Evidence from δ^(13)C, δ^(18)O and ^(87)Sr/^(86)Sr

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Acta Geologica Sinica(English Edition) 2014年第6期88卷 1852-1862页

作者： CHEN Haoru ZHENG Rongcai WEN Huaguo li Shilin li Shuang ZHOU Gang WEN longbin State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology Chongqing Gas District of Southwest Oil and Gas Company of CNPC Petroleum Exploration and Development Research Institute PetroC hina Southwest Oil and Gasfield Company

Karst rocks from the Huanglong Formation exposed at the margin of the Eastern Sichuan Basin can be divided into four types：slightly corroded, moderately corroded porous, intensely corroded brecciated and intensely corroded and replaced secondary calcic karstic rocks. The carbon, oxygen and strontium isotope compositions of the various karst rocks are analyzed systematically and compared to rocks without karst corrosion. The results indicate that（1） the Huanglong Formation in the eastern Sichuan Basin was a restricted bay supplied and controlled by freshwater in which mudmicrite and mud-dolomicrite exhibit low δ13C and δ18O values and high 87Sr/86 Sr ratios;（2） all types of karstic rocks in the paleokarst reservoirs of the Huanglong Formation in the research area are affected by atmospheric freshwater with the δ13C and δ18O values and 87Sr/86 Sr ratios in the original formation approaching those of atmospheric freshwater, which reflects ancient hydrological conditions, fluid properties, isotopic source and the fractionation effect;（3） the intensely corroded and replaced secondary limestone is affected by a variety of diagenetic fluids, often reflected by δ13C and δ18O values, while the 87Sr/86 Sr ratios exhibit the strong degree of the corrosion;（4） after comparing the 87Sr/86 Sr ratios of each type of karst rock, the diagenetic fluids are determined to be mainly atmospheric freshwater, and depending on the strength of corrosion, and the low 87Sr/86 Sr ratio fluids in the layer will participate in the karst process. The carbon, oxygen, and strontium isotopes of different karstic reservoirs can provide meaningful geochemical information for forecasting and evaluating the development and distribution rules of the Huanglong Formation at the margin of the eastern Sichuan Basin in time and space.

关键词： paleokarst reservoirs carbon and oxygen isotope strontium isotope geochemistry Huanglong Formation eastern Sichuan area

Palaeo-sea-ice changes on the North Icelandic shelf during the last millennium:Evidence from diatom records

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Science China Earth Sciences 2015年第6期58卷 962-970页

作者： SHA longbin JIANG Hui liU YanGuang ZHAO MeiXun li Dongling CHEN ZhenLou ZHAO Yun Key Laboratory of Geographic Information Science East China Normal University Key Laboratory of Marine Sedimentology and Environmental Geology First Institute of OceanographyState Oceanic Administration Key Laboratory of Marine Chemistry Theory and Technology of the Ministry of Education Ocean University of China Department of City Science Ningbo University

A high resolution record of sea-ice concentration on the North Icelandic shelf during the last millennium has been reconstructed using a diatom-based sea-ice transfer function. The reconstructed sea-ice record for the top of sediment core MD99–2275 exhibits a slightly increasing trend over the last 1000 years. Prior to AD 1300 sea-ice abundance was generally below the mean value, suggesting the strong influence of warm waters from the Irminger Current during the Medieval Warm Period. A marked increase of sea-ice concentration indicates an abrupt change to colder conditions after AD 1300, corresponding to the onset of the little Ice Age. The agreement between the reconstructed sea-ice concentration and IP25 data obtained from the same core, as well as with historical records of Icelandic sea ice, suggests that diatoms may provide a valuable tool for future quantitative reconstructions of past sea-ice variability. In addition, agreement between changes in the reconstructed sea-ice record and variations in the abundance of the major diatom components indicates that sea-ice conditions on the North Icelandic shelf are generally strongly influenced by changes in the strength of two different water masses, the cold Polar water periodically derived from the East Greenland Current and the warm Irminger Current derived from the North Atlantic Current. Our proxy evidence also indicates that variations in solar activity have a considerable impact on ocean dynamics, which in turn affects sea-ice abundance.

关键词： palaeo-sea-ice changes North Icelandic shelf Medieval Warm Period little Ice Age