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Kinematical synthesis of an inversion of the double linked fourbar for morphing wing applications
J. AGUIRREBEITIA, R. AVILéS, I. FERNáNDEZ, M. ABASOLO
《机械工程前沿(英文)》 2013年 第8卷 第1期 页码 17-32 doi: 10.1007/s11465-013-0364-5
This paper presents the kinematical features of an inversion of the double linked fourbar for morphing wing purposes. The structure of the mechanism is obtained using structural synthesis concepts, from an initial conceptual schematic. Then, kinematic characteristics as instant center of rotation, lock positions, dead point positions and uncertainty positions are derived for this mechanism in order to face the last step, the dimensional synthesis; in this sense, two kinds of dimensional synthesis are arranged to guide the wing along two positions, and to fulfill with the second one some aerodynamic and minimum actuation energy related issues.
关键词: morphing wing structural synthesis dimensional synthesis geometrical kinematics
Structural synthesis of ancient Chinese foot-operated silk-reeling mechanism
Kuohung HSIAO, Yuhsun CHEN, Hongsen YAN,
《机械工程前沿(英文)》 2010年 第5卷 第3期 页码 279-288 doi: 10.1007/s11465-010-0101-2
关键词: silk-reeling mechanism structure of mechanism reconstruction design history of machinery
Gripping mechanisms in current wood harvesting machines
D. GOUBET, J. C. FAUROUX, G. GOGU
《机械工程前沿(英文)》 2013年 第8卷 第1期 页码 42-61 doi: 10.1007/s11465-013-0358-3
This paper focuses on the structural synthesis of gripping mechanisms used in the mechanization of the harvesting process. The importance of the gripping function in current devices like harvesting heads is underlined. This function is performed with several typical mechanisms which are listed and described in this article. This study distinguishes two kinds of planar gripping mechanisms mainly used in opening and closing the rollers: five concentric and two lateral ones. Both kinds have advantages and drawbacks. So a third kind of hybrid mechanism has been designed in order to orientate the axis of the rollers during gripping motion in order to combine concentric and lateral gripping advantages. Two planar and one spatial existing mechanisms are described. The last part of this paper presents a structural synthesis of such a spatial parallel mechanism by using the structural parameters and the general formulae established by the third author. Nine kinematic diagrams of spatial parallel mechanisms are provided.
关键词: structural synthesis parallel mechanisms gripping mechanisms wood harvesting harvesting head
Approximation of structural damping and input excitation force
Mohammad SALAVATI
《结构与土木工程前沿(英文)》 2017年 第11卷 第2期 页码 244-254 doi: 10.1007/s11709-016-0371-9
关键词: structural modal parameters damping identification method input excitation force identification Inverse problem
Automated synthesis of steady-state continuous processes using reinforcement learning
《化学科学与工程前沿(英文)》 2022年 第16卷 第2期 页码 288-302 doi: 10.1007/s11705-021-2055-9
关键词: automated process synthesis flowsheet synthesis artificial intelligence machine learning reinforcement learning
Effects of green roof damping and configuration on structural seismic response
《结构与土木工程前沿(英文)》 页码 1133-1144 doi: 10.1007/s11709-023-0959-9
关键词: green infrastructure green roof structural resilience seismic design
Xinqun ZHU, Hong HAO
《结构与土木工程前沿(英文)》 2012年 第6卷 第3期 页码 321-333 doi: 10.1007/s11709-012-0161-y
关键词: integrated structural health monitoring operational conditions vibration and guided wave
Marcela Achimovičová, Erika Dutková, Erika Tóthová, Zdenka Bujňáková, Jaroslav Briančin, Satoshi Kitazono
《化学科学与工程前沿(英文)》 2019年 第13卷 第1期 页码 164-170 doi: 10.1007/s11705-018-1755-2
Chalcogenide nanostructured semiconductor, copper sulfide (CuS) was prepared from copper and sulfur powders in stoichiometric ratio by a simple, fast, and convenient one-step mechanochemical synthesis after 40 min of milling in an industrial eccentric vibratory mill. The kinetics of the mechanochemical synthesis and the influence of the physical properties of two Cu powder precursor types on the kinetics were studied. The crystal structure, physical properties, and morphology of the product were characterized by X-ray diffraction (XRD), the specific surface area measurements, particle size distribution and scanning electron microscopy. The XRD analysis confirmed the hexagonal crystal structure of the product-CuS (covellite) with the average size of the crystallites 11 nm. The scanning electron microscopy analysis has revealed that the agglomerated grains have a plate-like structure composed of CuS nanoparticles. The thermal analysis was performed to investigate the thermal stability of the mechanochemically synthesized CuS. The optical properties were studied using UV-Vis and photoluminescence spectroscopy. The determined optical band gap energy 1.80 eV responds to the value of the bulk CuS, because of agglomerated nanoparticles. In addition, a mechanism of CuS mechanochemical reaction was proposed, and the verification of CuS commercial production was performed.
关键词: copper sulfide industrial mechanochemical synthesis thermal analysis optical properties
Digital image correlation-based structural state detection through deep learning
《结构与土木工程前沿(英文)》 2022年 第16卷 第1期 页码 45-56 doi: 10.1007/s11709-021-0777-x
关键词: structural state detection deep learning digital image correlation vibration signal steel frame
Ali KARIMPOUR, Salam RAHMATALLA
《结构与土木工程前沿(英文)》 2020年 第14卷 第6期 页码 1331-1348 doi: 10.1007/s11709-020-0686-4
关键词: structural model validation eigenvalue problem response surface inverse problems
Advanced analysis for structural steel building design
CHEN Wai Fah
《结构与土木工程前沿(英文)》 2008年 第2卷 第3期 页码 189-196 doi: 10.1007/s11709-008-0024-8
关键词: building Specifications comprehensive introduction structural resistance traditional
Estimation of optimum design of structural systems via machine learning
《结构与土木工程前沿(英文)》 2021年 第15卷 第6期 页码 1441-1452 doi: 10.1007/s11709-021-0774-0
关键词: optimization metaheuristic algorithms harmony search structural designs machine learning artificial neural networks
Gholamreza ABDOLLAHZADEH, Hadi FAGHIHMALEKI
《结构与土木工程前沿(英文)》 2018年 第12卷 第3期 页码 425-437 doi: 10.1007/s11709-017-0427-5
In recent decades, many public buildings, located in seismic-prone residential areas, had to grapple with abnormal loads against which the structures were unguarded. In this piece of research, an ordinary three dimensional reinforced concrete building is selected as case study. The building is located in an earthquake-prone region; however, it is designed according to seismic building codes. Yet, it is not shielded against abnormal loads, such as blasts. It is assumed that the building suffers a blast load, due to mechanical/thermal installation failure during or after intense seismic oscillations. These two critical incidents are regarded codependent and compatible. So the researchers developed scenarios and tried to assess different probabilities for each scenario and carried out an analysis to ensure if progressive collapse had set in or not. In the first step, two analysis models were used for each scenario; a non-linear dynamic time history analysis and a blast local dynamic analysis. In the second step, having the structural destructions of the first step in view, a pushdown analysis was carried out to determine the severity of progressive collapse and assess building robustness. Finally, the annual probability of structural collapse under simultaneous earthquake and blast loads was estimated and offered.
关键词: gas blast pushdown analysis progressive collapse annual probability of structural collapse 3D model of structure
Effect of potassium carbonate on catalytic synthesis of calcium carbide at moderate temperature
Dejun SHI, Ke QIAO, Zifeng YAN
《化学科学与工程前沿(英文)》 2011年 第5卷 第3期 页码 372-375 doi: 10.1007/s11705-010-0570-1
Aixin WANG, Yuanbin SHE, Jing FAN
《化学科学与工程前沿(英文)》 2009年 第3卷 第2期 页码 219-221 doi: 10.1007/s11705-009-0058-z
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标题 作者 时间 类型 操作
Kinematical synthesis of an inversion of the double linked fourbar for morphing wing applications
J. AGUIRREBEITIA, R. AVILéS, I. FERNáNDEZ, M. ABASOLO
期刊论文
Structural synthesis of ancient Chinese foot-operated silk-reeling mechanism
Kuohung HSIAO, Yuhsun CHEN, Hongsen YAN,
期刊论文
Development of an integrated structural health monitoring system for bridge structures in operational
Xinqun ZHU, Hong HAO
期刊论文
Structural and optical properties of nanostructured copper sulfide semiconductor synthesized in an industrial
Marcela Achimovičová, Erika Dutková, Erika Tóthová, Zdenka Bujňáková, Jaroslav Briančin, Satoshi Kitazono
期刊论文
Identification of structural parameters and boundary conditions using a minimum number of measurement
Ali KARIMPOUR, Salam RAHMATALLA
期刊论文
Proposal of a probabilistic assessment of structural collapse concomitantly subject to earthquake and
Gholamreza ABDOLLAHZADEH, Hadi FAGHIHMALEKI
期刊论文
Effect of potassium carbonate on catalytic synthesis of calcium carbide at moderate temperature
Dejun SHI, Ke QIAO, Zifeng YAN
期刊论文