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Research on the Penetration of Spudcan Foundation for Mobile Jack-Up Platform [PDF]
, 2023 [Introduction] The spudcan foundation is the key structure of the mobile jack-up platform, which displaces surrounding soil during its penetrating installation.
Bo LIU, Donghua LIU, Zehua PAN
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Study on synergistic water-resisting stability of upper and lower soil layers and bedrock layer in shallow coal seam group [PDF]
, 2023 The roof water inrush of shallow buried coal seam is caused by the water flowing fractured zone through the aquifuge. With the downward mining of coal seam group, the mechanism of synergistic water isolation between soil layer and bedrock layer needs to ...
Haifei LIN +6 more
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全球能源互联网, 2019 准确评估风电场发电量水平对项目开发至关重要。针对海岸线附近的近海风电场，结合已建项目的测风塔数据和风电机组运行资料，得出WAsP计算模型主要参数取值。近海地区的风资源及发电量呈现一定的衰减规律，通过不同粗糙度和尾流衰减系数的设置，验证各方案模型电量与实际电量的拟合水平。结果表明，风电场的粗糙度取值要结合地形地貌、海洋水文条件等因素，海岸线附近近海风电场的粗糙度取值略高于软件推荐值，粗糙度水平为0～0.005 m；Park模型尾流衰减系数越小，发电量越小，不同的尾流衰减系数对发电量计算结果影响高达4.9%，
王尼娜 +5 more
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Kongjian kexue xuebao, 2023 卫星散射计通过测量海表粗糙度反演全球海面风场。对于Ku波段散射计，海表粗糙不仅和海面风场相关，还受海表温度的二阶效应调制。定量研究了海表温度对中法海洋卫星（CFOSAT）散射计（CSCAT）反演风速和后向散射测量的影响。结果表明，CSCAT两种极化方式测量的后向散射系数都会受到海表温度的影响，但是垂直极化中低入射角（θ < 36°）测量的后向散射系数几乎不随温度变化。因此CSCAT的风速偏差也随海表温度的变化而变化，且随着入射角的增大和风速的减小，海表温度对风速偏差的影响程度增大 ...
赵 晓康 +3 more
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, 1994 根据传统的Koch曲线;我们建立了节理剖面的理论分形模型来模拟节理剖面的粗糙性。由这个模型;节理的分形维数D可以直接由两个统计参数L*和h*(这里L*和h*分别为节理粗糙度的平均基长和平均高度)来估计;即 D=log4/log[2(1+costg~(-1)(2h*/L*))]。 这个分形维数很强地相关于岩石节理粗糙系数(JRC)值: JRC=85.2671(D-1)~(0.5679 ...
W.G.Pariseau, 谢和平
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Study on the Influence of Window Opening Forms of Single-Sided Ventilation Room on Indoor Wind Environment in Xiamen Area [PDF]
, 2017 针对厦门地区的气候特征及自然通风条件,对该地区建筑中有代表性的单侧通风房间进行简化抽象,得到五种不同通风开口形式的单侧通风物理模型,并加入不同楼; 层高度这一变量,运用CFD方法对其进行模拟研究。通过分析模拟结果得出,楼层高度可影响进入室内的风速、方向以及室内风场的分布,在单侧通风模型迎风面; 的竖向增设通风开口可在局部或整体上提高室内通风效果并且可以增强地面除潮和室内采光效果,但仍需从构造上解决此类开口形式的防水等问题。Based on the climatic characteristics and
石峰, 詹学渊
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裸露砒砂岩区坡面侵蚀过程中地表粗糙度与水力侵蚀特征参数的关系
Shuitu Baochi Xuebao, 2022 坡面地形起伏状况是影响土壤侵蚀状况的重要因素,深入了解地表粗糙度和产流产沙以及水动力参数之间的关系是研究坡面土壤侵蚀过程的基础。采用野外原位模拟冲刷试验,使用三维激光扫描仪结合ArcGIS提取地形因子参数,研究了裸露砒砂岩区坡面侵蚀过程中地表粗糙度与侵蚀特征参数的关系。结果表明:(1)冲刷强度的增大使得阻力特征参数逐渐降低,且随着冲刷时间的增加,弗劳德数也呈现降低趋势,其他水力学参数呈增大趋势 ...
董晓宇 +5 more
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Study on Lubricating Properties of Sucrose Solution for Oral Soft Contact(面向口腔软接触的蔗糖溶液润滑特性研究) [PDF]
Shipin kexue jishu xuebao, 2022 Beverages with low friction usually have better smoothness and comfort in swallowing. As a major component of common beverages, the study of lubrication properties of the sucrose in oral environment will help to discover the influencing factors of low ...
DING Zongru(丁宗如) +4 more
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Shuitu Baochi Xuebao, 2023 粗糙度是影响坡面流水动力特性的关键因子,为探究渐变粗糙度影响下坡面流水力特性,采用粒子图像测速技术(particle image velocimetry, PIV)观测并分析3组流量下渐变粗糙床面下坡面流的流速轮廓线、紊动强度、雷诺应力和壁面切应力的变化规律。结果表明:(1)流速随粗糙度增加而减小;拟合无量纲流速得到流速分布对数公式,粗糙度增大与拟合常数A成反比,与积分系数B成正比。(2)渐变地表粗糙度流向紊动强度与光滑床面坡面流变化趋势相似。流向紊动强度随相对水深的增大而减小。随着粗糙度增大 ...
谷方正 +4 more
doaj
Stochastic discrete element modelling of rough particles-a random normal interaction law [PDF]
, 2016 Particles are assumed smooth in classical discrete element modelling, but real particles have random rough surfaces which may influence their mechanical properties.
Yuntian Feng
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