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Frequencies of circular plate with concentric ring and elastic edge support
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《机械工程前沿(英文)》 2014年 第9卷 第2期 页码 168-176 doi: 10.1007/s11465-014-0299-5
Exact solutions for the flexural vibrations of circular plates having elastic edge conditions along with rigid concentric ring support have been presented in this paper. Values of frequency parameter for the considered circular plate are computed for different sets of values of elastic rotational and translation restraints and the radius of internal rigid ring support. The results for the first three modes of plate vibrations are computed and are presented in tabular form. The effects of rotational and linear restraints and the radius of the rigid ring support on the vibration behavior of circular plates are studied over a wide range of non-dimensional parametric values. The values of the exact frequency parameter presented in this paper for varying values of restraint parameters and the radius of the rigid ring support can better serve in design and as benchmark solutions to validate the numerical methods obtained by using other methods of solution.
关键词: circular plate frequency elastic edge rigid ring mode switching
Tahir MAHMOOD, Sangarapillai KANAPATHIPILLAI, Mahiuddin CHOWDHURY
《机械工程前沿(英文)》 2013年 第8卷 第2期 页码 181-186 doi: 10.1007/s11465-013-0257-7
This paper demonstrates the application of a new multiaxial creep damage model developed by authors using stress traixiality to predict the failure time of a component made of 0.5%Cr-0.5%Mo-0.25%V low alloy steel. The model employs strain energy density and assumes that the uniaxial strain energy density of a component can be easily calculated and can be converted to multi-axial strain energy density by multiplying it to a function of stress trixiality which is a ratio of mean stress to equivalent stress. For comparison, an elastic-creep and elastic-plastic-creep finite element analysis (FEA) is performed to get multi-axial strain energy density of the component which is compared with the calculated strain energy density for both cases. The verification and application of the model are demonstrated by applying it to thin tube for which the experimental data are available. The predicted failure times by the model are compared with the experimental results. The results show that the proposed model is capable of predicting failure times of the component made of the above-mentioned material with an accuracy of 4.0%.
关键词: elastic-creep elastic-plastic-creep stress triaxiality life prediction pressure vessels finite element analysis (FEA)
Edge preparation methods for cutting tools: a review
《机械工程前沿(英文)》 2023年 第18卷 第4期 doi: 10.1007/s11465-023-0766-y
关键词: edge preparation method preparation principle cutting edge geometry edge characterization tool performance
Structural design of morphing trailing edge actuated by SMA
Qi WANG, Zhiwei XU, Qian ZHU
《机械工程前沿(英文)》 2013年 第8卷 第3期 页码 268-275 doi: 10.1007/s11465-013-0261-y
In this paper, the morphing trailing edge is designed to achieve the up and down deflection under the aerodynamic load. After a detailed and accurate computational analysis to determine the SMA specifications and layout programs, a solid model is created in CATIA and the structures of the morphing wing trailing edge are produced by CNC machining. A set of DSP measurement and control system is designed to accomplish the controlling experiment of the morphing wing trailing edge. At last, via the force analysis, the trailing edge is fabricated with four sections of aluminum alloy, and the arrangement scheme of SMA wires is determined. Experiment of precise control integral has been performed to survey the control effect. The experiment consists of deflection angle tests of the third joint and the integral structure. Primarily, the ultimate deflection angle is tested in these two experiments. Therefore, the controlling experiment of different angles could be performed within this range. The results show that the deflection error is less than 4% and response time is less than 6.7 s, the precise controlling of the morphing trailing edge is preliminary realized.
关键词: morphing wing trailing edge shape memory alloy digital signal processor PID algorithm
Knife-edge technique for laser cooling
WANG Zhanshan, MA Shanshan, MA Yan, ZHAO Min, LIU Hengbiao
《机械工程前沿(英文)》 2007年 第2卷 第4期 页码 468-473 doi: 10.1007/s11465-007-0081-z
关键词: knife-edge technique uniformity coupled transfer fluorescent
Nonlinear dynamic analysis for elastic robotic arms
M. H. KORAYEM, H. N. RAHIMI
《机械工程前沿(英文)》 2011年 第6卷 第2期 页码 219-228 doi: 10.1007/s11465-011-0218-y
The aim of the paper is to analyze the nonlinear dynamics of robotic arms with elastic links and joints. The main contribution of the paper is the comparative assessment of assumed modes and finite element methods as more convenient approaches for computing the nonlinear dynamic of robotic systems. Numerical simulations comprising both methods are carried out and results are discussed. Hence, advantages and disadvantages of each method are illustrated. Then, adding the joint flexibility to the system is dealt with and the obtained model is demonstrated. Finally, a brief description of the optimal motion generation is presented and the simulation is carried out to investigate the role of robot dynamic modeling in the control of robots.
关键词: robotic arms elastic link elastic joint nonlinear dynamics optimal control
Senping WANG; Xiaolong LIU; Bo YUAN; Minjie SHI; Yanhui WEI
《结构与土木工程前沿(英文)》 2022年 第16卷 第9期 页码 1141-1152 doi: 10.1007/s11709-022-0866-5
关键词: torsional stiffness strength design elastic buckling space truss arches out-of-plane
Real-time task processing method based on edge computing for spinning CPS
Shiyong YIN, Jinsong BAO, Jie LI, Jie ZHANG
《机械工程前沿(英文)》 2019年 第14卷 第3期 页码 320-331 doi: 10.1007/s11465-019-0542-1
洪学海,汪洋
《中国工程科学》 2018年 第20卷 第2期 页码 20-26 doi: 10.15302/J-SSCAE-2018.02.004
边缘计算是一项正在兴起的技术,通过把计算、存储、带宽、应用等资源放在网络的边缘侧,以便减小传输延迟和带宽消耗。同时,应用开发者和内容提供商可以根据实时的网络信息提供可感知的服务。移动终端、物联网等设备为计算敏感型的应用提供了必要的前端处理支撑,例如图像识别、网络游戏等应用,以利用边缘计算的处理能力分担云端工作负荷。本文介绍了边缘计算的概念、需解决的关键问题、主要研究进展,边缘计算发展带来的影响以及边缘计算带来的机遇和发展对策。
Effects of elastic support on the dynamic behaviors of the wind turbine drive train
Shuaishuai WANG, Caichao ZHU, Chaosheng SONG, Huali HAN
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 348-356 doi: 10.1007/s11465-017-0420-7
The reliability and service life of wind turbines are influenced by the complex loading applied on the hub, especially amidst a poor external wind environment. A three-point elastic support, which includes the main bearing and two torque arms, was considered in this study. Based on the flexibilities of the planet carrier and the housing, a coupled dynamic model was developed for a wind turbine drive train. Then, the dynamic behaviors of the drive train for different elastic support parameters were computed and analyzed. Frequency response functions were used to examine how different elastic support parameters influence the dynamic behaviors of the drive train. Results showed that the elastic support parameters considerably influenced the dynamic behaviors of the wind turbine drive train. A large support stiffness of the torque arms decreased the dynamic response of the planet carrier and the main bearing, whereas a large support stiffness of the main bearing decreased the dynamic response of planet carrier while increasing that of the main bearing. The findings of this study provide the foundation for optimizing the elastic support stiffness of the wind turbine drive train.
关键词: wind turbine drive train elastic support dynamic behavior frequency response function
Aswathy Vasudevan, Vasyl Shvalya, Aleksander Zidanšek, Uroš Cvelbar
《化学科学与工程前沿(英文)》 2019年 第13卷 第3期 页码 427-443 doi: 10.1007/s11705-019-1805-4
关键词: graphene edge electronics 2D nanomaterials plasma electrical conductivity
分级移动边缘云中节省开销的资源分配 Special Feature on Future Network-Research Article
Ming-shuang JIN, Shuai GAO, Hong-bin LUO, Hong-ke ZHANG
《信息与电子工程前沿(英文)》 2019年 第20卷 第9期 页码 1209-1220 doi: 10.1631/FITEE.1800203
《化学科学与工程前沿(英文)》 2023年 第17卷 第11期 页码 1755-1764 doi: 10.1007/s11705-023-2318-8
关键词: oxygen evolution reaction porous carbon nanosheets Co nanoparticles edge-induced topological defects Zn–air batteries
Nonlinear elastic model for compacted clay concrete interface
R. R. SHAKIR, Jungao ZHU
《结构与土木工程前沿(英文)》 2009年 第3卷 第2期 页码 187-194 doi: 10.1007/s11709-009-0033-2
关键词: interface modeling friction soil structure interface soil structure interaction simple shear test
标题 作者 时间 类型 操作
using strain energy density as a function of stress triaxiality under quasi-static loading employing elastic-creep& elastic-plastic-creep deformation
Tahir MAHMOOD, Sangarapillai KANAPATHIPILLAI, Mahiuddin CHOWDHURY
期刊论文
Knife-edge technique for laser cooling
WANG Zhanshan, MA Shanshan, MA Yan, ZHAO Min, LIU Hengbiao
期刊论文
Out-of-plane elastic buckling load and strength design of space truss arch with a rectangular section
Senping WANG; Xiaolong LIU; Bo YUAN; Minjie SHI; Yanhui WEI
期刊论文
Real-time task processing method based on edge computing for spinning CPS
Shiyong YIN, Jinsong BAO, Jie LI, Jie ZHANG
期刊论文
Effects of elastic support on the dynamic behaviors of the wind turbine drive train
Shuaishuai WANG, Caichao ZHU, Chaosheng SONG, Huali HAN
期刊论文
Tailoring electrical conductivity of two dimensional nanomaterials using plasma for edge electronics:
Aswathy Vasudevan, Vasyl Shvalya, Aleksander Zidanšek, Uroš Cvelbar
期刊论文
“Charging” the cigarette butt: heteroatomic porous carbon nanosheets with edge-induced topological defects
期刊论文