检索结果-内蒙古大学图书馆

Experimental study of corner separation and unsteady characteristics in linear compressor cascades with and without sweeping jet actuator

引用

Propulsion and Power Research 2024年第3期13卷 360-374页

作者： S.W.Chen W.H.Li C.Xu Q.H.Meng School of Energy Science and Engineering Harbin Institute of TechnologyHarbinHeilongjiang 150001China AVIC Shenyang Aircraft Design and Research Institute Shenyang 110035China

Sweeping jet actuator(SJA)has been widely applied for activeflow control in *** this paper,the SJA character in compressor cascade and its performance for separation control in innerflows are ***-averaged and transientflowfield measurement,together with visualization methods are *** is found that endwall effects are important for both SJA behaviors and SJA performance for separation control in compressor *** is a maximum of 12.7%total pressure loss reduction with SJA placed near the separation position,close to the endwall and under *** characteristic frequencies in theflowfield contribute to the capture of influence regions of vortices and excitation *** concentrated shedding vortices and SJA jets impact region helped to judge that SJA energizes low momentumfluids in a large region and matches the high loss core *** be concrete,theflow separation control mechanism of SJA lies on the interruption of the blade suction surface boundary layer development and the restriction of the lifting of the boundary layer from end-wall towards blade suction surface.

关键词： Compressor cascade Activeflow control Sweeping jet actuator Corner separation Oilflow visualization

来源：评论

学校读者我要写书评

暂无评论

STUDY ON A SIMPLIFIED MODEL OF A HIGH-RISE SHEAR-TYPE BUILDING FOR EVALUATION OF Q–Δ RESONANCE

Journal of Structural and Construction Engineering

引用

Journal of Structural and Construction engineering 2023年第803期88卷 59-70页

作者： Anamizu, Ryosuke Kohiyama, Masayuki School of Science for Open and Environmental Systems Graduate School of Science and Technology Keio University Japan Dept. of System Design Engineering Faculty of Science and Technology Keio University Japan

To evaluate Q–Δ resonance, which is a torsional resonance phenomenon caused by geometric non-linearity, we proposed a simplified model for an n-story non-eccentric building model with a shear-type structure. We designed and fabricated a four-story small-scale specimen assuming a non-eccentric steel structure with a height of 324 m, and conducted shaking table tests. As a result, the occurrence of Q–Δ resonance was confirmed as predicted by the simplified model. In addition, the simplified model reproduced the resonance amplitude in a finite element model of the specimen with the out-of-plane rotation of slabs constrained and its validity was confirmed. © 2023 Authors. All rights reserved.

关键词： Tall buildings

来源：评论

学校读者我要写书评

暂无评论

Proposal for valleytronic materials:Ferrovalley metal and valley gapless semiconductor

引用

Frontiers of physics 2024年第2期19卷 131-139页

作者： San-Dong Guo Yu-Ling Tao Guangzhao Wang Shaobo Chen Dong Huang Yee Sin Ang School of Electronic Engineering Xi’an University of Posts and TelecommunicationsXi’an 710121China Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing School of Electronic Information EngineeringYangtze Normal UniversityChongqing 408100China College of Electronic and Information Engineering Anshun UniversityAnshun 561000China Science Mathematics and Technology(SMT)Singapore University of Technology and Design(SUTD)8 Somapah RoadSingapore 487372Singapore

Valleytronic materials can provide new degrees of freedom to future electronic *** this work,the concepts of the ferrovalley metal(FVM)and valley gapless semiconductor(VGS)are proposed,which can be achieved in valleytronic bilayer systems by electric field *** valleytronic bilayer systems,the interaction between out-of-plane ferroelectricity and A-type antiferromagnetism can induce layer-polarized anomalous valley Hall(LP-AVH)*** K and−K valleys of FVM are both metallic,and electron and hole carriers simultaneously *** the extreme case,the FVM can become VGS by analogizing spin gapless semiconductor(SGS).Moreover,it is proposed that the valley splitting enhancement and valley polarization reversal can be achieved by electric field engineering in valleytronic bilayer *** the bilayer RuBr_(2)as an example,our proposal is confirmed by the first-principle *** FVM and VGS can be achieved in bilayer RuBr_(2)by applying electric *** appropriate electric field range,increasing electric field can enhance valley splitting,and the valley polarization can be reversed by flipping electric field *** effectively tune valley properties by electric field in bilayer systems,the parent monolayer should possess out-of-plane magnetization,and have large valley *** results shed light on the possible role of electric field in tuning valleytronic bilayer systems,and provide a way to design the ferrovalley-related material by electric field.

关键词： valleytronics electric field bilayer

来源：评论

学校读者我要写书评

暂无评论

A modified maxwell-pulse thermoplastic constitutive model of in-situ Ta-particle reinforced Zr-based bulk metallic glass composites

引用

Progress in Natural Science:Materials International 2024年第4期34卷 753-766页

作者： Pan Gong Zhuang Wang Guoqing Yu Maojun Li Xin Zhuo Xuefeng Tang Mao Zhang Lei Deng Junsong Jin A.A.Churakova Xinyun Wang State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle Hunan University Institute of Molecule and Crystal Physics Ufa Federal Research Center RAS

The impact of different Ta contents on the mechanical properties and thermoplastic forming ability of in-situ Taparticle reinforced Zr–Cu–Al–Ni bulk metallic glass composites was studied. The composition(Zr55Cu30Al10-Ni5)94Ta6with the best comprehensive performance was chose for a systematic investigation into its thermoplastic behavior in the supercooled liquid region（SLR）, with quantitative analysis conducted by the strain rate sensitivity index and activation volume. The steady-state flow stress and the stress overshoot intensity were augmented with deformation temperature decreasing, strain rate increasing, and the addition of the secondary phase, leading to a transition from Newtonian to non-Newtonian flow regime. The addition of the secondary phase deteriorated the rheological properties of the material. To solve the problem that the Maxwell-Pulse constitutive model showed an inability to accurately describe the steady-state flow process. A modified constitutive relationship, introducing the effect of the volume fraction of Ta particles on viscosity and elastic modulus in the steady-state flow process which was ignored in Maxwell-pulse model, was established. The fitting results of the true stress-strain curves of the modified Maxwell-pulse constitutive model were in better agreement with the experimental date than those of the Maxwell-pulse constitutive model, with higher prediction accuracy. The modified constitutive model well predicted the thermoplastic deformation behavior of(Zr55Cu30Al10Ni5)*** influence mechanism of Ta particles on the flow behavior was explained that Ta particles increased the viscosity of amorphous matrix, thereby hindering its flow and ultimately leading to an increase in flow stress.

关键词： Bulk metallic glass composites Supercooled liquid region Thermoplastic deformation Constitutive model Influence mechanism

来源：评论

学校读者我要写书评

暂无评论

Fractional viscoelastic solution of stratum displacement of a shallow tunnel under the surface slope condition

引用

Underground Space 2023年第3期10卷 233-247页

作者： Fanchao Kong Dechun Lu Chao Ma Chenpeng Shen Xiaodong Yang Xiuli Du Institute of Geotechnical and Underground Engineering Beijing University of TechnologyBeijing 100124China School of Civil and Transportation Engineering Beijing University of Civil Engineering and ArchitectureBeijing 102626China Beijing Urban Construction Design&Development Group Co. LimitedThe Third Design Institute of Railway InstituteBeijing 100034China College of Mechanical Engineering Beijing University of TechnologyBeijing 100124China

The unified displacement function(UDF)is presented to describe the deformation behaviours of the tunnel profile along with time under the surface slope *** on the discrete Fourier method,the third-order UDF in the physical plane is expanded to the Laurent series in the complex variable *** complex variable method is employed to derive the elastic analytical solution of stra-tum displacement,when the third-order UDF is taken as the displacement boundary condition of tunnel cross-section(DBCTC).The proposed elastic solution agrees well with the results of the finite element method for the consistent model,which verifies the correctness of the proposed analytical *** the corresponding principle and fractional Generalized Kelvin viscoelastic constitutive model,the fractional viscoelastic solution under the surface slope condition is *** time effect of stratum displacement is presented in two aspects:time-dependent DBCTC and time-dependent material *** parameter analysis is performed to investigate influences of deformation modes of the third-order UDF,slope angle,tunnel radius and fractional order on the time effect of stratum vertical and horizontal displacement.

关键词： Third-order unified displacement function Surface slope condition Fractional viscoelastic solution Complex variable method Discrete Fourier method

来源：评论

学校读者我要写书评

暂无评论

3D Rendering Impact in Virtual Reality based Architectural design Collaboration 10

3D Rendering Impact in Virtual Reality based Architectural D...

引用

10th International Conference on Virtual Reality, ICVR 2024

作者： Lee, Jin Gang Korea University of Technology and Education School of Industrial Design & Architectural Engineering Cheonan Korea Republic of

ISBN: (纸本)9798350364231

Amidst the growing trend of utilizing 3D models for collaborative efforts in architectural design, this study examines the effects of 3D rendering on user experience in architectural visualization across VR and 2D platforms. Through a controlled experiment, it evaluates how rendering elements affect presence and engagement. The research findings underscore a strong preference for rendered models, particularly within the VR environment, where realism, immersion, and user engagement are significantly enhanced. This study highlights rendering's pivotal role in enriching architectural visualization, offering key insights into its contributions to spatial realism and user experience, while also addressing potential areas for improvement in rendering techniques to reduce negative user perceptions like spatial distortion and interface intrusiveness. © 2024 IEEE.

关键词： Virtual environments

来源：评论

学校读者我要写书评

暂无评论

A STUDY ON THE CALCULATION METHOD FOR ULTIMATE SHEAR STRENGTH OF THE REINFORCED CONCRETE COLUMN WITH WING WALLS

引用

AIJ Journal of technology and design 2024年第75期30卷 751-756页

作者： Tomoaki, Yuzuriha Kazuaki, Tsuda Graduate School of Industrial Science and Science and Engineering Kindai Univ Japan Faculty of Science and Technology Industrial Architecture Design Dept Kindai Univ. Japan

The calculation method for the shear strength of columns with wing walls was developed. In this proposed method, the shear strength is calculated by the truss theory. The calculation results by the proposed method cor... 详细信息

关键词： Finite element method

来源：评论

学校读者我要写书评

暂无评论

An adjacent-effects resistant damper integrating control and measurement functions for duct systems

引用

Building Simulation 2024年第12期17卷 2199-2212页

作者： Ruoyin Jing Ran Gao Song Nie Xinpeng Hao Changqing Yang Angui Li School of Building Services Science and Engineering Xi’an University of Architecture and TechnologyXi’anShaanxi 710055China China Railway Siyuan Survey and Design Institute Group Co. Ltd.WuhanChina

To ensure a comfortable building environment necessitates accurate measurement and control of air volume within duct systems to meet predetermined requirements for each *** eccentric torque dampers’measurement accuracy may be compromised by adjacent effects from local components,resulting in significant measurement *** solve this problem,the study combines CFD numerical simulation and full-scale experimental validation to derive a formula for controlling air volume within the dampers under operational *** on the formula,a novel torque damper is developed,capable of effectively controlling and accurately measuring air volume in duct *** linking the two blades,the damper resists the adjacent effects of local components(elbow,variable diameter,tee)on air volume measurements without the need for additional devices,ensuring a measurement error within±5.5%.Additionally,the novel dampers have lower resistance compared to traditional *** paper provides a reference for accurately measuring and effectively controlling air volume,while also maximizing the potential benefits of multi-leaf dampers.

关键词： ventilation air volume adjacent effects flow coefficient control and measurement

来源：评论

学校读者我要写书评

暂无评论

Mechanical performance of 22SiMn2TiB steel welded with lowtransformation- temperature filler wire and stainless steel filler wire

引用

Journal of Iron and Steel Research International 2024年第4期31卷 967-981页

作者： Zi-dong Lin Kai-jie Song Zhen Sun Zi-qian Zhu Xue-feng Zhao Constantinos Goulas Wei Ya Xing-hua Yu School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China Department of Design Production and Management Faculty of Engineering Technology.University of TwenteEnschede 7500 AETheNetherlands Rotterdam Additive Manufacture Fieldlab(RAMLAB) Rotterdam 3089 JWTheNetherlands

TX-80 low-transformation-temperature(LTT)welding wire was used to replace the traditional ER 307Si welding wire to realize the connection of 22SiMn2TiB armor steel in manual overlay *** previously existing issues,such as welding cracks,large welding deformation,and severe welding residual stress,were solved to ensure good strength and ductility *** particular,with the same welding conditions,TX-80 LTT wire eliminates welding *** reduces the welding deformation no matter the base pretreatment of pre-setting angle or no pre-setting *** comparison,it was found that the microstructure at the TX-80 weld is mainly composed of martensite and a small amount of retained *** contrast,the microstructure of the ER 307Si weld consists of a large amount of austenite and a small amount of skeleton-like *** variation trend of residual stress and microhardness from the weld to the base were investigated and compared with the mechanical properties of base *** TX-80 and the ER 307Si tensile samples elongation is 6.76%and 6.01%,while the ultimate tensile strengths are 877 and 667 MPa,*** average impact toughness at room temperature of the ER 307Si weld is 143.9 J/cm^(2),much higher than that of the TX-80 weld,which is only 36.7 J/cm^(2).The relationship between impact and tensile properties with microstructure species and distribution was *** addition,the fracture surface of the tensile and the impact samples was observed and *** dimples,fewer pores,larger radiation zone,and shear lips of TX-80 samples indicate better tensile ductility and worse impact toughness than those of ER 307Si weld.

关键词： Low-transformation-temperature material 22SiMn2TiB steel Welding deformation Residual stress Martensitic transformation Mechanical property

来源：评论

学校读者我要写书评

暂无评论

Human thermal comfort in non-uniform thermal environments:A review

引用

Energy and Built Environment 2024年第6期5卷 853-862页

作者： Xiaowen Su Yanping Yuan Zhaojun Wang Wei Liu Li Lan Zhiwei Lian School of Mechanical Engineering Southwest Jiaotong UniversityChengduChina 610031 School of Architecture Harbin Institute of TechnologyHarbinChina 150006 Department of Architecture School of DesignShanghai Jiao Tong UniversityShanghaiChina

Thermal comfort is critical for ensuring the health and productivity of occupants and knowing their thermal demand could help creat a satisfying environment with the least energy *** of thermal comfort is built based on experimental studies in uniform and stable environments,while there is still a gap when applying in evaluating human thermal comfort in non-uniform thermal ***,an insight into human thermal comfort in non-uniform thermal environments is *** fundamental studies of thermal comfort in non-uniform thermal environments are explicated,including thermal comfort theory applied in non-uniform thermal environments,types of non-uniform thermal environments and corresponding studies,physiological and psychological thermal responses in the ***,the evaluation indices of non-uniform thermal environments are classified according to their definitions and the comfort models are ***,future works in this research field are *** general,the overall thermal comfort and local thermal comfort should be both taken into account in non-uniform thermal environments where skin temperatures and psychological thermal responses of occupants are different among local body ***,as studies of local thermal comfort are mainly conducted in thermally neutral condition,the limits considering the state deviating thermal neutrality(slightly warm or cool),which is frequently found in reality,are encouraged to be ***,a well-defined comprehensive index should be proposed considering heat exchange of human body with their microenvironments and thus the comfort range of the index could be provided for designing of non-uniform thermal environments.

关键词： Local thermal comfort Non-uniform thermal environment Comfort theory Thermal response Evaluation indices

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：