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掺氢天然气输送用X52管线钢的氢脆行为研究

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油气与新能源 2024年第3期36卷 30-35,59页

作者：刘方杨宏伟邓付洁中海石油气电集团技术研发中心北京100028

将氢气以一定比例掺入现有天然气管网进行大规模长距离输送是氢能储运较为高效和经济的方式之一,但是在氢气环境中管线钢会发生氢脆现象,导致管线钢的力学性能发生退化,给管道的安全运行带来隐患。针对不同氢气含量环境条件下管线钢的... 详细信息

将氢气以一定比例掺入现有天然气管网进行大规模长距离输送是氢能储运较为高效和经济的方式之一,但是在氢气环境中管线钢会发生氢脆现象,导致管线钢的力学性能发生退化,给管道的安全运行带来隐患。针对不同氢气含量环境条件下管线钢的氢脆行为进行研究,对X52管线钢进行慢应变速率拉伸试验和准静态断裂韧性试验,并结合断口形貌分析掺氢比对管线钢力学性能的影响。结果表明:在管道压力为7.5 MPa,掺氢比为3%、5%、10%的条件下,X52管线钢与无氢环境相比断后总伸长率下降程度小于8%;断口形貌表明在掺氢比小于10%的条件下,以韧性断裂为主,没有典型脆性断口形貌;随着氢气含量的增加X52管线钢的劣化程度增加。

关键词：天然气掺氢管线钢氢脆敏感性慢应变速率拉伸断裂韧性

A Hybrid Territorial Aquatic Bionic Soft Robot with Controllable Transition Capability

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Journal of Bionic Engineering 2023年第2期20卷 568-583页

作者： Qingzhong Li Fukang Zhang Zeying Jing fujie Yu Yuan Chen Department of Mechatronics and Information Engineering Shandong University at WeihaiWeihai264209China

In this paper,a bionic mantis shrimp amphibious soft robot based on a dielectric elastomer is proposed to realize highly adaptive underwater multimodal *** the action of an independent actuator,it is not only able to complete forward/backwards motion on land but also has the ability of cyclically controllable transition motion from land to water surface,from water surface to water bottom and from water bottom to *** fastest speed of the soft robot on land is 170 mm/s,and it can crawl while carrying up to 4.6 times its own *** maximum speeds on the water surface and the water bottom are 30 mm/s and 14.4 mm/s,***,the soft robot can climb from the water bottom with a 9°slope transition to *** with other similar soft robots,this soft robot has outstanding advantages,such as agile speed,large load-carrying capacity,strong body flexibility,multiple motion modes and strong underwater ***,nonlinear motion models of land crawling and water swimming are proposed to improve the environmental adaptability under multiple modalities,and the correctness of the theoretical model is verified by experiments.

关键词： Transition Amphibious soft robot Dielectric elastomers Bionic mantis shrimp soft robot

Influence of collagen fibre orientation on the frictional properties of articular cartilage

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Biosurface and Biotribology 2021年第2期7卷 90-97页

作者： Seido Yarimitsu Kei Ito Hiromichi fujie Graduate School of Systems Design Tokyo Metropolitan UniversityHachiojiTokyoJapan

Articular cartilage has a unique collagen fibre network structure that exhibits both anisotropy and depth *** fibre orientation in a cross-section parallel to the articular cartilage surface may affect the lubrication properties of articular *** effect of collagen fibre orientation on the frictional properties of articular cartilage was examined through finite element analysis of the ***,a three-dimensional fibre-reinforced poroelastic biphasic model was used to determine the influence of collagen fibril orientation on the frictional properties of articular *** simulations reveal that collagen fibre orientation has a significant influence on the deformation behaviour of articular cartilage in front of and behind the contact *** coefficient of dynamic friction was lower in the direction parallel to the collagen fibre orientation than in the direction perpendicular to the collagen fibre orientation,regardless of the indenter speed.

关键词： friction fibre deformation

NORMAL CRITERIA FOR A FAMILY OF HOLOMORPHIC CURVES

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Acta Mathematica Scientia 2021年第6期41卷 1887-1895页

作者： Daochun SUN Yingying HUO fujie CHAI School of Mathematics South China Normal UniversityGuangzhou510631China School of Applied Mathematics Guangdong University of TechnologyGuangzhou510520China School of Financial Mathematics&Statistics Guangdong University of FinanceGuangzhou510521China

In this paper,we extend the concept of holomorphic curves sharing hyperplanes and introduce definitions of restricted hyperplanes and partial shared ***,we prove several normal criteria of the family of holomorphic curves and holomorphic mappings that concern restricted hyperplanes and partial shared *** results generalize the Montel-type normal criterion of holomorphic curves.

关键词： complex projective spaces holomorphic curves holomorphic mappings normal families restricted hyperplanes

基于无人机的火电厂热力管网巡检路径规划与优化

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电力设备管理 2024年第8期 71-73页

作者：孙强常福杰李志杰国能寿光发电有限责任公司北京电科智擎科技有限公司

无人机的应用范围已涉及各行各业,火电厂的热力管网巡检开始尝试使用无人机进行操作。在火电厂热力管网巡检中应用无人机具有高效、安全、准确的优势,本文对某市火电厂热力管网的巡检问题进行剖析,并根据某市火电厂热力管网的巡检条件... 详细信息

无人机的应用范围已涉及各行各业,火电厂的热力管网巡检开始尝试使用无人机进行操作。在火电厂热力管网巡检中应用无人机具有高效、安全、准确的优势,本文对某市火电厂热力管网的巡检问题进行剖析,并根据某市火电厂热力管网的巡检条件提出相应优化路径,以期对相关研究起到一定的补充作用。

关键词：无人机火电厂热力管网巡检路径

Preparation and Mechanism Research of Hydrationheat-inhibiting Materials with Microcapsule Sustained-releasing Technology

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Journal of Wuhan University of Technology(Materials Science) 2021年第5期36卷 697-705页

作者： JIA fujie YAO Yan LI Changcheng State Key Laboratory of Green Building Materials China Building Materials AcademyBeijing 100024China

Hydration-heat-inhibiting materials(HIM)with polysaccharide as core material was prepared using microcapsule sustained-releasing technology,through a centrifugal spray granulation process after melting *** preparation process parameters of HIM were selected by the semi-adiabatic temperature rise test of cement *** air microcalorimeter was used to investigate the regulation performance of HIM on the hydration of *** influence of HIM on the microstructure of cement was investigated by XRD,SEM,and *** results showed that the most suitable wall material for HIM was polyethylene wax,the optimum polyethylene wax/polysaccharide mass ratio was 1,and the most effective particle size was 0.16-0.30 *** coated by polyethylene wax released slowly,and the peak heat release rate of cement could be reduced by 55.2%after continuous *** regulation period continued to 120 *** mainly decreased the C3S reaction rate,which resulted in a 39.2%peak value reduction of hydration heat release ***,HIM had little regulation on *** hydration heat release process of cement-based materials can be designed by adjusting the dosage of HIM.

关键词： microcapsule sustained-release hydration heat inhibition

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川渝地区深井注水泥环空流体掺混规律研究

西南石油大学学报（自然科学版） 2024年第4期46卷 178-188页

作者：杨涪杰孙劲飞胥珂维罗涵临李早元油气藏地质及开发工程全国重点实验室西南石油大学四川成都610500 西南石油大学理学院四川成都610500 西南石油大学人工智能研究院四川成都610500 中国石油西南油气田公司工程技术研究院四川成都610000

深井固井注水泥过程中,由于长封固段,窄间隙,高偏心等复杂井眼条件的影响,环空流体易发生掺混,混浆可能导致掺混段摩阻增大,造成固井漏失。针对川东高磨区块油层套管固井作业中高偏心环空的循环当量密度(ECD)预测不准确的问题,开展了固... 详细信息

深井固井注水泥过程中,由于长封固段,窄间隙,高偏心等复杂井眼条件的影响,环空流体易发生掺混,混浆可能导致掺混段摩阻增大,造成固井漏失。针对川东高磨区块油层套管固井作业中高偏心环空的循环当量密度(ECD)预测不准确的问题,开展了固井注水泥流体掺混模拟及混浆流变性实验研究,研究基于计算流体力学(CFD)软件实时计算混浆段各流体占比变化,通过流变实验拟合流变性方程计算井筒ECD,结果证明了偏心度是影响混浆比例变化的主要影响因素,低偏心度时,钻井液、隔离液和水泥浆比例主要为5:1:4,而高偏心度时,比例主要为7:1:2;考虑混浆的ECD较常规ECD在上部混浆段高出0.2~0.8 g/cm^(3),在下部纯水泥段要高出0.2~0.5 g/cm^(3)。本研究揭示了深井复杂井况对流体间掺混比例及混浆对井筒当量密度的影响,对保障川渝地区深井固井注水泥安全作业和提高固井质量具有重要意义。

关键词：深井偏心度掺混流变性循环当量密度

THE GROWTH AND BOREL POINTS OF RANDOM ALGEBROID FUNCTIONS IN THE UNIT DISC

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Acta Mathematica Scientia 2021年第4期41卷 1119-1129页

作者： Daochun SUN Yingying HUO fujie CHAI School of Mathematics South China Normal UniversityGuangzhou 510631China School of Applied Mathematics Guangdong University of TechnologyGuangzhou 510520China School of Financial Mathematics&Statistics Guangdong University of FinanceGuangzhou 510521China

In this paper,we construct k-valued random analytic algebroid functions for the first *** combining the properties of random series,we study the growth and Bor el points of random analytic algebroid functions in the u... 详细信息

关键词： Sequence of random variables algebroid functions growth Borel points

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基于地貌区划的新疆地表基质质地分类方案

现代地质 2024年第3期38卷 706-717页

作者：李洪宇刘晓煌刘玖芬赵晓峰张文博李福杰中国地质调查局自然资源综合调查指挥中心北京100055 中国地质大学(北京)地球科学与资源学院北京100083 自然资源要素耦合过程与效应重点实验室北京100055 中国地质调查局乌鲁木齐自然资源综合调查中心新疆乌鲁木齐830001

地表基质调查是新时代自然资源调查监测与地质工作的新领域,分类是地表基质调查的前提。为尽快掌握全国或省级更大区域的地表基质空间格局,需借鉴相关学科概念、充分利用已有基础调查成果,探索分类方案。质地是地表基质内不同颗粒的组... 详细信息

地表基质调查是新时代自然资源调查监测与地质工作的新领域,分类是地表基质调查的前提。为尽快掌握全国或省级更大区域的地表基质空间格局,需借鉴相关学科概念、充分利用已有基础调查成果,探索分类方案。质地是地表基质内不同颗粒的组合状况,基于质地类型刻画地表基质类型,有助于明确其孕育林草生态要素的本底特征。新疆地域广阔、地貌复杂,地貌是该区自然资源与地表基质质地分类空间分异的主控因素。本研究利用数字高程模型、遥感影像、土地利用、土壤性质、植物特征等多源信息,确定新疆地貌三级区划方案,基于地貌区划提出地表基质质地的分类方案。将新疆按坡度、起伏度、高程和成因分为47种地貌类型,划分6个一级、27个二级和1056个三级地貌区。山地区的三级地貌区数量高于平原区,中海拔丘陵是分布最广泛的三级地貌类型,中起伏中山和中海拔风积地貌分别是山地和平原内面积最大的三级地貌类型。大部分地貌类型的植被根系深度平均值低于100 cm, 0~200 cm的土壤信息足以描述新疆地表基质结构。不同三级地貌类型的0~200 cm内主要土壤质地类型的数量占比均值为70.9%,表明在新疆采用基于地貌的地表基质质地分类具有一定可靠性。粉壤质、砂质和砾质是新疆的主要地表基质质地,分别占全疆面积的49.6%、27.1%和10.3%。粉壤质是新疆森林、草原与耕地资源数量与质量最高的质地分类。基于地貌类型的地表基质质地分类方案兼顾了水热条件与地表物质组成,有助于评价不同类别自然资源的适宜性,可为新疆土地整治与生态修复提供重要参考。

关键词：新疆地貌区划地表基质质地分类自然资源