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Identification of dynamic stiffness matrix of bearing joint region
Feng HU, Bo WU, Youmin HU, Tielin SHI
《机械工程前沿(英文)》 2009年 第4卷 第3期 页码 289-299 doi: 10.1007/s11465-009-0064-3
关键词: frequency response function (FRFs) dynamic stiffness finite element synthetic substructure method joint region
《结构与土木工程前沿(英文)》 页码 901-914 doi: 10.1007/s11709-023-0915-8
关键词: shield tunnel segment joint joint structural model failure mechanism
Yunlin LIU, Shitao ZHU
《结构与土木工程前沿(英文)》 2019年 第13卷 第5期 页码 1095-1104 doi: 10.1007/s11709-019-0538-2
关键词: PCS concrete side joint numerical simulation fiber-beam element joint model solid element joint model seismic behavior
Dynamic characteristics of a magnetorheological pin joint for civil structures
Yancheng LI,Jianchun LI
《机械工程前沿(英文)》 2014年 第9卷 第1期 页码 15-33 doi: 10.1007/s11465-014-0283-0
Magnetorheological (MR) pin joint is a novel device in which its joint moment resistance can be controlled in real-time by altering the applied magnetic field. The smart pin joint is intended to be used as a controllable connector between the columns and beams of a civil structure to instantaneously shift the structural natural frequencies in order to avoid resonance and therefore to reduce unwanted vibrations and hence prevent structural damage. As an intrinsically nonlinear device, modelling of this MR fluid based device is a challenging task and makes the design of a suitable control algorithm a cumbersome situation. Aimed at its application in civil structure, the main purpose of this paper is to test and characterise the hysteretic behaviour of MR pin joint. A test scheme is designed to obtain the dynamic performance of MR pin joint in the dominant earthquake frequency range. Some unique phenomena different from those of MR damper are observed through the experimental testing. A computationally-efficient model is proposed by introducing a hyperbolic element to accurately reproduce its dynamic behaviour and to further facilitate the design of a suitable control algorithm. Comprehensive investigations on the model accuracy and dependences of the proposed model on loading condition (frequency and amplitude) and input current level are reported in the last section of this paper.
关键词: Magnetorheological pin joint hyperbolic hysteresis model experimental testing frequency dependence
基于人体髋关节转动中心分析的髋关节外骨骼仿生设计 Article
Wei YANG,Can-jun YANG,Ting XU
《信息与电子工程前沿(英文)》 2016年 第17卷 第8期 页码 792-802 doi: 10.1631/FITEE.1500286
Saleh YAGHOOBI, Ahmad SHOOSHTARI
《结构与土木工程前沿(英文)》 2018年 第12卷 第3期 页码 341-351 doi: 10.1007/s11709-017-0393-y
Slippage corresponds to the relative displacement of a bolted joint subjected to shear loads since the construction clearance between the bolt shank and the bolthole at assembly can cause joint slip. Deflections of towers with joint slippage effects is up to 1.9 times greater than the displacements obtained by linear analytical methods. In this study, 8 different types of joints are modelled and studied in the finite element program, and the results are verified by the experimental results which have been done in the laboratory. Moreover, several types of joints have been modelled and studied and load-deformation curves have also been presented. Finally, joint slip data for different types of angles, bolt diameter and bolt arrangements are generated. Thereupon, damping ratios (z) for different types of connections are reported. The study can be useful to help in designing of wind turbine towers with a higher level of accuracy and safety.
关键词: Joint slip cyclic loading Finite element modelling Experimental joint behavior damping ratios (
General closed-form inverse kinematics for arbitrary three-joint subproblems based on the product of
《机械工程前沿(英文)》 2022年 第17卷 第2期 doi: 10.1007/s11465-022-0681-7
关键词: inverse kinematics Paden–Kahan subproblems three-joint subproblems product of exponential closed-form solution
Multi-omics joint analysis revealed the metabolic profile of retroperitoneal liposarcoma
《医学前沿(英文)》 doi: 10.1007/s11684-023-1020-z
Fang WANG, Jiaping LIU
《结构与土木工程前沿(英文)》 2010年 第4卷 第4期 页码 474-482 doi: 10.1007/s11709-010-0089-z
关键词: Nu ethnic group Li-su ethnic group mixed region living culture living mode living acts
A low cost wearable optical-based goniometer for human joint monitoring
Chee Kian LIM, Zhiqiang LUO, I-Ming CHEN, Song Huat YEO
《机械工程前沿(英文)》 2011年 第6卷 第1期 页码 13-22 doi: 10.1007/s11465-011-0201-7
Widely used in the fields of physical and occupational therapy, goniometers are indispensible when it comes to angular measurement of the human joint. In both fields, there is a need to measure the range of motion associated with various joints and muscle groups. For example, a goniometer may be used to help determine the current status of the range of motion in bend the arm at the elbow, bending the knee, or bending at the waist. The device can help to establish the range of motion at the beginning of the treatment series, and also allow the therapist to monitor progress during subsequent sessions. Most commonly found are the mechanical goniometers which are inexpensive but bulky. As the parts are mechanically linked, accuracy and resolution are largely limited. On the other hand, electronic and optical fiber-based goniometers promise better performance over its mechanical counterpart but due to higher cost and setup requirements does not make it an attractive proposition as well. In this paper, we present a reliable and non-intrusive design of an optical-based goniometer for human joint measurement. This device will allow continuous and long-term monitoring of human joint motion in everyday setting. The proposed device was benchmarked against mechanical goniometer and optical based motion capture system to validate its performance. From the empirical results, it has been proven that this design can be use as a robust and effective wearable joint monitoring device.
Yi XU, Shunze WU, Hongkuan ZANG, Guiguang HOU
《环境科学与工程前沿(英文)》 2014年 第8卷 第2期 页码 239-255 doi: 10.1007/s11783-013-0536-x
关键词: interval analysis mixed integer joint probabilistic constraint planning uncertainty waste management
Protective roles of heat stress on the neurons in hippocampal CA1 region of mice
WANG Chunxu, WANG Hanxing
《医学前沿(英文)》 2007年 第1卷 第4期 页码 418-422 doi: 10.1007/s11684-007-0082-7
Bioaerosol emissions variations in large-scale landfill region and their health risk impacts
《环境科学与工程前沿(英文)》 2022年 第16卷 第12期 doi: 10.1007/s11783-022-1593-9
● The airborne bacteria in landfills were 4–50 times higher than fungi.
关键词: Microbial aerosols Landfill sites Health risk assessment CALPUFF
Carbon payments in the Guanzhong–Tianshui region to control land degradation
Zixiang ZHOU, Yufeng ZOU
《农业科学与工程前沿(英文)》 2017年 第4卷 第2期 页码 246-253 doi: 10.15302/J-FASE-2017144
关键词: carbon-price carbon sequestration economic returns Guanzhong–Tianshui economic region net present value
Chunyan QUAN,Wei WANG,Jian ZHOU,Rong WANG
《结构与土木工程前沿(英文)》 2016年 第10卷 第3期 页码 333-344 doi: 10.1007/s11709-016-0357-7
关键词: narrow outer diaphragm concrete-filled tubular column joint inner and outer stiffening cyclic behavior
标题 作者 时间 类型 操作
Identification of dynamic stiffness matrix of bearing joint region
Feng HU, Bo WU, Youmin HU, Tielin SHI
期刊论文
Analytical algorithms of compressive bending capacity of bolted circumferential joint in metro shield
期刊论文
Finite element analysis on the seismic behavior of side joint of Prefabricated Cage System in prefabricated
Yunlin LIU, Shitao ZHU
期刊论文
Dynamic characteristics of a magnetorheological pin joint for civil structures
Yancheng LI,Jianchun LI
期刊论文
Joint slip investigation based on finite element modelling verified by experimental results on wind turbine
Saleh YAGHOOBI, Ahmad SHOOSHTARI
期刊论文
General closed-form inverse kinematics for arbitrary three-joint subproblems based on the product of
期刊论文
The comparative study of dwelling houses in the southwest multi-ethnic region, taking Fugong county for
Fang WANG, Jiaping LIU
期刊论文
A low cost wearable optical-based goniometer for human joint monitoring
Chee Kian LIM, Zhiqiang LUO, I-Ming CHEN, Song Huat YEO
期刊论文
An interval joint-probabilistic programming method for solid waste management: a case study for the city
Yi XU, Shunze WU, Hongkuan ZANG, Guiguang HOU
期刊论文
Protective roles of heat stress on the neurons in hippocampal CA1 region of mice
WANG Chunxu, WANG Hanxing
期刊论文
Carbon payments in the Guanzhong–Tianshui region to control land degradation
Zixiang ZHOU, Yufeng ZOU
期刊论文