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3D large-scale SPH modeling of vehicle wading with GPU acceleration

Science China(Physics,Mechanics & Astronomy) 2023年第10期66卷 70-91页

作者： huashan zhang Xiaoxiao Li Kewei Feng Moubin Liu College of Engineering Peking UniversityBejing 100871China Joint Laboratory of Marine Hydrodynamics and Ocean Engineering Laoshan LaboratoryQingdao 266237China Nanchang Innovation Institute Peking UniversityNanchang 330008China Shenzhen TenFong Technology Co.Ltd. Shenzhen 518055China

Vehicle wading is a complex fluid-structure interaction(FSI) problem and has attracted great attention recently from the automotive industry, especially for electric vehicles. As a meshless Lagrangian particle method, smoothed particle hydrodynamics(SPH) is one of the most suitable candidates for simulations of vehicle wading due to its inherent advantages in modeling free surface flows, splash, and moving interfaces. Nevertheless, the inevitable neighbor query for the nearest adjacent particles among the support domain leads to considerable computational cost and thus limits its application in 3D large-scale simulations. In this work, a GPU-based SPH method is developed with an adaptive spatial sort technology for simulations of vehicle wading. In addition, a fast, easy-to-implement particle generator is presented for isotropic initialization of the complex vehicle geometry with optimal interpolation properties. A comparative study of vehicle wading on a puddle between the GPUbased SPH with two pieces of commercial software is used to verify the capability of the GPU-based SPH method in terms of convergence analysis, kinematic characteristics, and computing performance. Finally, different conditions of vehicle speeds, water depths, and puddle widths are tested to investigate the vehicle wading numerically. The results demonstrate that the adaptive spatial sort technology can significantly improve the computing performance of the GPU-based SPH method and meanwhile promotes the GPU-based SPH method to be a competitive tool for the study of 3D large-scale FSI problems including vehicle wading. Some helpful findings of the critical vehicle speed, water depth as well as boundary wall effect are also reported in this work.

关键词： vehicle wading fluid-structure interaction GPU-based SPH adaptive spatial sort technology

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Study on crystallization and microstructure of Li_2O-Al_2O_3-SiO_2 glass ceramics

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Journal of University of Science and Technology Beijing 2006年第6期13卷 564-569页

作者： Zhaoxia Hou Yongming zhang huashan zhang Hongbo zhang Jing Shao Chunhui Su School of Materials and Chemical Engineering Changchun University of Science and Technology Changchun 130022 China Department of Chemical Engineering Jilin Institute of Chemical Technology Jilin 132022 China Department of Material Science and Engineering Shenyang Institute of Chemical Technology Shenyang 110142 China

Lithium aluminosilicate （LAS） glasses are generally difficult to prepare because of their high melting temperature. In this study, the preparation of LAS glasses was achieved at a relatively low melting temperature. The batch containing MgO-ZnO-LiEO- Al2O3-SiO2 was melted in a platinum crucible at 1550℃ for 2 h and was then followed by two- or three-step heat treatment processes for nucleation and crystal growth. The characterizations were carried out by differential thermal analysis, X-ray diffraction, infrared spectroscopy, scanning electron microscopy, and UV-Vis-NIR scanning spectrophotometry. The hexagonal stuffed β-eucryptite solid solution crystallized at 840-960℃. Most of the hexagonal β-eucryptite solid solution transformed into the tetragonal β-spodumene solid solution at 1100℃. Almost all the aluminum atoms entered into the tetrahedral sites in the aluminosilicate network of the 6- eucryptite/β-quartz solid solution. All of the Al atoms did not belong to the aluminosilicate network of the β-spodumene solid solution. The glass ceramic with a mean grain size of 10-20 nm is transparent, the transmittance reaches -85% in the visible light wavelength.

关键词： inorganic compounds glass ceramics crystallization behavior microstructure characterization

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Discovery and Analysis of the Fossilised Yuling-Man Skull

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地域研究与开发 1993年第S1期12卷 8-18页

作者： Feng Xingxiang Zhou huashan Ba Zhigang zhang Guangye Wang Panji zhang Zhenyu(Department of Geography, Henan University Kaifeng, Henan 475001, China)

A fossilised paleoanthropological skull was discovered in November 1987, in the guily-head cliff on the east bank of Wenyu River near Xinza village, Yuling - town (hence the name Yuling-Man), Lingbao country, Henan Province, China. The skull, dated to an absolute U-isotope (U234 to U238 ) age of B. P. 156000 ± 13000 years, was found in the upper portion of the alluvial statum of the mid-Pleistocens Series, together with pateoliths of the Kehe Cutture System in the mid-late Paleolithic Periods. Although much research has been nomied out in this area, this is the first fossilised paleoanthropological skull in have been found. Therefore, this project, funded by the Natural Science Foundation/Henan Scientific Committee, is making new contributions to paleoanthropological research in China.

关键词： Yuling-Man late mid-Pleistocene Paleolithic Period.

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分离检测生物活性物质的荧光标记试剂与分子探针及其应用

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化学进展 2007年第5期19卷 633-642页

作者：王红张华山武汉大学化学与分子科学学院分析科学研究中心武汉430072

作者结合自己的研究工作主要评述了用于分离检测氨基化合物(氨基酸、肽、蛋白质和生物胺等)、巯基化合物(谷胱甘肽、半胱氨酸和高半胱氨酸等)及NO等生物活性物质的荧光标记试剂和荧光分子探针的近期进展和应用。除了传统的OPA、NDA、DNS... 详细信息

作者结合自己的研究工作主要评述了用于分离检测氨基化合物(氨基酸、肽、蛋白质和生物胺等)、巯基化合物(谷胱甘肽、半胱氨酸和高半胱氨酸等)及NO等生物活性物质的荧光标记试剂和荧光分子探针的近期进展和应用。除了传统的OPA、NDA、DNS、FMOC、FITC、NBD-F、AQC、Cy5等在HPLC和CE分离荧光检测应用新进展,还介绍了许多新的荧光分子探针和标记试剂的性能和应用,它们是N-羟基琥珀酰亚胺活性酯荧光标记试剂,6-氧-(N-琥珀酰亚胺乙酸酯)-9-(2′-甲氧羰基)荧光素(SAMF),1,3,5,7-四甲基-8-苯基-(4′-O-(N-琥珀酰亚胺乙酸酯))-二氟化硼-二吡咯甲烷(TMPAB-OSu,)等和3-碘乙酰胺苯嵌蒽酮荧光探针及MCY5、DSTCY、DCDSTCY和DCTCY等花菁类近红外荧光探针等。

关键词：荧光标记试剂荧光分子探针荧光检测 HPLC CE 造影

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Synthesis　of　meso-Tetra-(2-chloro-4-Sulfophenyl)　Prophyrin　and　Spectrophotometric　Determination　of　Trace　Amounts　of　Cadmium

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Wuhan University Journal of Natural Sciences 1997年第1期2卷 99-102页

作者： Xiao Ling Zhao Yuanyuan zhang huashan zhang Chuanyou Cheng Jieke Department of Chemistry Wuhan University Wuhan China

Synthesis of a new high sensitive water soluble chromogenic reagent mes o tetra (2 chloro 4 sulfophenyl)prophyrin and the conditions for the reaction of this reagent with cadmiun(Ⅱ) were studied. The apparent molar absorption coefficient at 434 nm is 5.20×10 5 L·mol -1 ·cm -1 . The method has been applied to the determination of 5.0×10 -9 (content by weight) Cadmium(Ⅱ) in honey.

关键词： meso tetra (2 chloro 4 sulfophenyl)prophyrin,cadmium spectrophotometry

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2,3,7-三羟基-9-[3,5-二溴-4-(2,4-二羟基)苯偶氮]苯基荧光酮的合成及与锆(Ⅵ)的显色反应

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分析化学 2000年第2期28卷 164-167页

作者：黄应平张华山武汉大学化学系!武汉430072 湖北三峡学院化学系!宜昌443000

介绍了新试剂2，3，7三羟基-9-[3，5-二溴-4-（2，4二羟基）苯偶氮]苯基荧光酮（DBARPF）的合成。通过元素分析、红外光谱和紫外光谱等方法测试，确定了该试剂的组成和结构。研究了试剂与一些金属离子显色反应的光度性质，建立了光度法... 详细信息

介绍了新试剂2，3，7三羟基-9-[3，5-二溴-4-（2，4二羟基）苯偶氮]苯基荧光酮（DBARPF）的合成。通过元素分析、红外光谱和紫外光谱等方法测试，确定了该试剂的组成和结构。研究了试剂与一些金属离子显色反应的光度性质，建立了光度法测定微量锆（Ⅳ）的新方法。在0．6mol/L盐酸介质中，阳离子表面活性剂CTMAB存在下，锆（Ⅳ）与DBARP形成稳定的1：4水溶性络合物，λmax＝538nm，λ538nm为1．78×105L·mol-1·cm-1。锆（Ⅳ）含量在0～400μg/L范围服从比尔定律。拟定方法用于铝合金样品中微量锆（Ⅳ）的测定，获得满意的结果。

关键词： 2,3,7-三羟基-9-[3,5-二溴-4-(2,4-二羟基)苯偶氮]苯基荧光酮锆(Ⅳ) 显色反应分光光度法

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酶法水解猪血蛋白的研究

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粮食与饲料工业 1999年第8期 33-34,47页

作者：张华山湖北工学院生物工程系

采用酶法开发了营养价值高而价格低廉的蛋白质资源———猪血。ＡＳ１３９８中性蛋白酶对动物血的水解能力最强，胰蛋白酶次之，而木瓜蛋白酶与菠萝蛋白酶的水解能力最差。ＡＳ１３９８中性蛋白酶水解猪血的最佳条件为：ｐＨ为７... 详细信息

采用酶法开发了营养价值高而价格低廉的蛋白质资源———猪血。ＡＳ１３９８中性蛋白酶对动物血的水解能力最强，胰蛋白酶次之，而木瓜蛋白酶与菠萝蛋白酶的水解能力最差。ＡＳ１３９８中性蛋白酶水解猪血的最佳条件为：ｐＨ为７５，温度为４０℃，酶与底物之比为８０００Ｕ／ｇ，底物浓度的质量分数为８％。酶水解７ｈ，水解率可达４８９％。

关键词：蛋白酶水解氨基酸猪血蛋白酶法

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Separation of Nine Metal Tetrekis (M-Bromic)phenylporphyrin Complexes by High-performance Liquid Chromatography

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Chemical Journal of Chinese Universities 1988年第1期 17-22页

作者： Cheng Jieke(Cheng Jai-Kai), Xu Xuejun, zhang huashan andzhang Chuanyou(Laboratory of Analytical Chemistry, Wuhan University, Wuhan)

A series of compounds of meso-tetraphenylporphyrin (TPP) derivatives of fluorine, chlorine and bromine was synthesized. The sub-stituent of meta-Br has a great effect on the retention strength of TPP. The reversed-phase HPLC for the separation of some metal complexes of meso-tetrakis (m -bromic) phenylporphyrin (m-BrTPP) was studied. The resolution( R ) of the metal complexes increases significantly. A combination of an octadecyl-bonded stationary phase with a mobile phase such as methanol-acetone mixture has been proved tobe effective for the separation. The nine m-BrTPP complexes of Sn, Mg, Cd, Fe, Pb, Zn, Ni, Cu and Ag and m-BrTPP free acid were completely separated within 20min on a RP-18 column (YQG-C18, China, 5μm, 150×5mm i.d.) with a 65:35 (V/V) mixture of mefhanol and acetone. The detection limits are in the range of from 6 to 100ppt (pg/mL) for each metal except Pb. The recoveries of the eight trace metals in the synthetical mixture samples were in the range of 93-108%.

关键词： Ni meta Separation of Nine Metal Tetrekis M-Bromic)phenylporphyrin Complexes by High-performance Liquid Chromatography

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纤维增强复合材料强度理论的研究现状与发展趋势——“破坏分析奥运会”评估综述

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力学进展 2007年第1期37卷 80-98页

作者：黄争鸣张华山同济大学航空航天与力学学院上海200092

复合材料强度涉及许多力学问题,计算分析复杂．由于分析问题的角度和解决问题的方法不同,迄今为止已经产生了许许多多不同的强度理论．那么,究竟这些理论的效果如何?为此,在英国的工程与自然科学研究委员会和机械工程师协会支持下,一个... 详细信息

复合材料强度涉及许多力学问题,计算分析复杂．由于分析问题的角度和解决问题的方法不同,迄今为止已经产生了许许多多不同的强度理论．那么,究竟这些理论的效果如何?为此,在英国的工程与自然科学研究委员会和机械工程师协会支持下,一个堪称为复合材料“破坏分析奥运会”的评估于1991年启动并在2004年完成．本文根据参赛理论和评比结果,对复合材料破坏与强度理论的研究现状进行了简要综述,并指出了今后发展所需解决的一些问题．

关键词：复合材料强度理论本构关系应力计算破坏判据刚度衰减

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Effect of Heat Treatment on Crystallization of Nd:YAG Ceramics

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Journal of Wuhan University of Technology(Materials Science) 2007年第2期22卷 333-336页

作者：张华山苏春辉 School of Materials and Chemical Engineering Changchun University of Science and Technology

（Nd0.01Y0.99）3Al5O12 nano-sized powders were synthesized by low temperature combustion （LCS）, using Nd2O3, Y2O3, Al（NO3）3.9H2O, ammonia water and citric acid as starting materials. The powders were characterized by TG-DTA, XRD, FT-IR, ICP and TEM, respectively. The grain sizes were calculated by the Scherrer＇s formula using the full width at half maximum （FWHM） of YAG （420） crystal plane diffraction lines. The study focused on crystallization of ceramics at different heat treatment temperatures. The experimental results show that crystallizing temperature of YAG is 850 ℃, and the intermediate crystal phase YAP, appearing during heat treatment, transforms to YAG cubic crystal phase at the temperature of 1 050℃. The particle size of the powders synthesized by LCS is nano-sized. With the temperature increasing, the mean grain sizes raise, the stand deviations keep almost at the value of 2.0 and the lattice parameters decrease. The grains mainly grow by grain boundary diffusion. The lattice parameter expansion is caused by an increase of the repulsive dipolar interactions on surfaces of crystallites,

关键词： laser ceramics neodymium-doped yttrium aluminum garnet (Nd:YAG) nano-sized powders low temperature combustion synthesis (LCS)

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