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Baosheng ZHAO, Yang GAO, Yingtao ZHAO, Dechen ZHANG
《机械工程前沿（英文）》 2011年 第6卷 第3期 页码 318-323 doi: 10.1007/s11465-011-0232-0
The refined theory for axi-symmetric magnetoelastic circular cylinder is deduced systematically and directly from linear magnetoelasticity theory. Based on the general solution of magnetoelastic equation and the Lur’e method, the refined theory yields the solutions for magnetoelastic circular cylinder without ad hoc assumptions. On the basis of the refined theory developed in the present study, solutions are obtained for magnetoelastic circular cylinder with homogeneous and non-homogenous boundary conditions, respectively. For the circular cylinder with homogeneous boundary conditions, the refined theory provides exact solutions that satisfy all of the governing equations. The exact solutions can be divided into three parts: the 2-orders equation, the transcendental equation, and the magnetic equation. In the case of non-homogenous boundary conditions, the approximate governing equations are accurate up to the high-order terms with respect to cylinder radius.
关键词： refined analysis axially symmetric deformation circular cylinder Bessel’s function axial magnetic field
Boundary conditions for axisymmetric piezoelectric cylinder
Baosheng ZHAO, Di WU, Xi CHEN
《机械工程前沿（英文）》 2013年 第8卷 第4期 页码 401-408 doi: 10.1007/s11465-013-0272-8
For axisymmetric piezoelectric cylinder, the reciprocal theorem and the axisymmetric general solution of piezoelasticity are applied in a novel way to obtain the appropriate stress and mixed boundary conditions accurate to all orders for the cylinder of general edge geometry and loadings. A decay analysis technique developed by Gregory and Wan is converted into necessary conditions on the end-data of axisymmetric piezoelectric circular cylinder, and the rapidly decaying solution is established. The prescribed end-data of the circle cylinder must satisfy these conditions in order that they could generate a decaying state within the cylinder. When stress and mixed conditions are imposed on the end of cylinder, these decaying state conditions for the case of axisymmetric deformation of piezoelectric cylinder are derived explicitly. They are then used for the correct formulation of boundary conditions for the theory solution (or the interior solution) of axisymmetric piezoelectric cylinder. The results of the present paper enable us to establish a set of correct boundary conditions, most of which are obtained for the first time.
关键词： solid and structures the axisymmetric deformation the piezoelectric circular cylinder the refined theory Bessel’s Function
A pneumatic cylinder driving polyhedron mobile mechanism
Wan DING, Sung-Chan KIM, Yan-An YAO
《机械工程前沿（英文）》 2012年 第7卷 第1期 页码 55-65 doi: 10.1007/s11465-012-0301-z
A novel pneumatic cylinder driving polyhedron mobile mechanism is proposed in this paper. The mechanism is comprised of 5 tetrahedrons which includes a pneumatic cylinder in each edge. It locomotes by rolling and the rolling principle refers to the center of mass (CM) of the mechanism moved out of the supporting area and let it tip over through the controlling of the motion sequence of these cylinders. Firstly, the mathematical model is built to analysis the relation between the configuration and the CM of the mechanism. Then, a binary control strategy is developed to simplify and improve the control of this mobile mechanism. After that, dynamic simulation is performed to testify the analytical validity and feasibility of the rolling gaits. At last, a prototype is fabricated to achieve the rolling successfully to demonstrate the proposed concept.
LEVERAGING LIVESTOCK TO PROMOTE A CIRCULAR FOOD SYSTEM
Zhengxia DOU
《农业科学与工程前沿（英文）》 2021年 第8卷 第1期 页码 188-192 doi: 10.15302/J-FASE-2020370
LEVERAGING LIVESTOCK TO PROMOTE A CIRCULAR FOOD SYSTEM
《农业科学与工程前沿（英文）》 2021年 第8卷 第1期
Livestock provide multifaceted services to human societies worldwide. In developing countries, they are crucial assets and safety net for rural poor, and they provide nutrients-dense food to nourish people. In developed economies, growth in demand for animal-derived food is slowing while attention is growing over the role of livestock farming in an enhanced circular food system for sustainability. This analysis, focusing on the modern food systems in developed countries, aims to highlight the unique function of livestock that helps people re-harvest and upcycle crop and food residues generated along the food chain that are otherwise unfit for human consumption. First, human-unusable crop and food residue materials are described in three broad categories based on their characteristics and potential feeding attributes; the magnitude of biomass materials that are already used in routine animal feeding as well as residues that remain as underutilized resources are illustrated using the USA as an example. Then, the research and technology development critically needed for the future is discussed. As the world strives to produce more food with smaller environmental and climate footprints, upcycling the residual biomass via livestock for food production presents a viable pathway toward improved resource use, reduced pollution and enhanced food system efficiency.
Enhancing fatigue life of cylinder-crown integrated structure by optimizing dimension
Weiwei ZHANG,Xiaosong WANG,Zhongren WANG,Shijian YUAN
《机械工程前沿（英文）》 2015年 第10卷 第1期 页码 102-110 doi: 10.1007/s11465-015-0329-y
Cylinder-crown integrated hydraulic press (CCIHP) is a new press structure. The hemispherical hydraulic cylinder also functions as a main portion of crown, which has lower weight and higher section modulus compared with the conventional hydraulic cylinder and press crown. As a result, the material strength capacity is better utilized. During the engineering design of cylinder-crown integrated structure, in order to increase the fatigue life, structural optimization on the basis of the adaptive macro genetic algorithms (AMGA) is first conducted to both reduce weight and decrease peak stress. It is shown that the magnitude of the maximum principal stress is decreased by 28.6%, and simultaneously the total weight is reduced by 4.4%. Subsequently, strain-controlled fatigue test is carried out, and the stress-strain hysteresis loops and cyclic hardening curve are obtained. Based on linear fit, the fatigue properties are calculated and used for the fatigue life prediction. It is shown that the predicted fatigue life is significantly increased from 157000 to 1070000 cycles after structural optimization. Finally, according to the optimization design, a 6300 kN CCIHP has been manufactured, and priority application has been also suggested.
关键词： cylinder-crown integrated hydraulic press (CCIHP) adaptive macro genetic algorithms (AMGA) strain-controlled fatigue test
金涌,冯之浚,陈定江
《中国工程科学》 2010年 第12卷 第1期 页码 4-11
我国从开始关注循环经济理念,到今天把循环经济定为国家发展的基本国策之一,已经历了十余个年头。从理论探索到工程实践，在多学科共同交叉研究中，许多专家学者提出了诸多基本理念。为了承上启下，笔者试图对这方面的创新思想进行总括，作为进一步以工程科技创新推进循环经济发展的指导思想。
Frequencies of circular plate with concentric ring and elastic edge support
null
《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
Convective mass transfer from a horizontal rotating cylinder in a slot air jet flow
Hongting MA , Dandan MA , Na YANG ,
《能源前沿（英文）》 2009年 第3卷 第3期 页码 289-296 doi: 10.1007/s11708-009-0019-8
关键词： air jet impinging rotating cylinder critical point mass transfer characteristics
CHEN Changfu, XIAO Shujun, YANG Yu
《结构与土木工程前沿（英文）》 2007年 第1卷 第3期 页码 329-333 doi: 10.1007/s11709-007-0043-x
Hydraulic fracturing pressure of concentric double-layered cylinder in cohesive soil
《结构与土木工程前沿（英文）》 2021年 第15卷 第4期 页码 937-947 doi: 10.1007/s11709-021-0754-4
关键词： hydraulic fracturing pressure layered cavity expansion theory triaxial fracturing test cohesive soil
Jizu LV, Minli BAI, Long ZHOU, Jian ZHOU,
《能源前沿（英文）》 2010年 第4卷 第3期 页码 392-401 doi: 10.1007/s11708-009-0066-1
关键词： heat transfer space non-uniformity soot emission in-cylinder diesel
Lokavarapu Bhaskara Rao, Chellapilla Kameswara Rao
《机械工程前沿（英文）》 2013年 第8卷 第3期 页码 291-297 doi: 10.1007/s11465-013-0255-9
This work presents the existence of buckling mode switching with respect to the radius of concentric rigid ring support. The buckling mode may not be axisymmetric as previously assumed. In general, the plate may buckle in an axisymmetric mode but when the radius of the ring support becomes small, the plate may buckle in an asymmetric mode. The optimum radius of the concentric rigid ring support for maximum buckling load is also determined. Introducing internal rigid ring support, when placed at an optimal position increases the elastic buckling load capacity by 149.39 percent. The numerical results obtained are in good agreement with the previously published data.
关键词： buckling circular plate elastically restrained edge rigid ring support mode switching
Numerical analysis of hydrodynamic process of circular-translational-moving polishing (CTMP)
ZHAI Wenjie, LIU Changxiong, LIANG Yingchun
《机械工程前沿（英文）》 2008年 第3卷 第4期 页码 441-448 doi: 10.1007/s11465-008-0074-6
关键词： numerical analysis practical CTMP circular-translational-moving polishing CTMP different
A new method for boring of non-circular holes
ZHANG Kai, HU De-jin
《机械工程前沿（英文）》 2006年 第1卷 第4期 页码 456-460 doi: 10.1007/s11465-006-0058-3
关键词： electromagnetic actuation control method displacement flexible body revolving electromagnetic
标题 作者 时间 类型 操作
Refined analysis of axi-symmetric circular cylinder in the axial magnetic field without ad hoc assumption
Baosheng ZHAO, Yang GAO, Yingtao ZHAO, Dechen ZHANG
期刊论文
Enhancing fatigue life of cylinder-crown integrated structure by optimizing dimension
Weiwei ZHANG,Xiaosong WANG,Zhongren WANG,Shijian YUAN
期刊论文
Convective mass transfer from a horizontal rotating cylinder in a slot air jet flow
Hongting MA , Dandan MA , Na YANG ,
期刊论文
Unified solution of limit loads of thick wall cylinder subject to external pressure considering strain
CHEN Changfu, XIAO Shujun, YANG Yu
期刊论文
Effect of heat transfer space non-uniformity of combustion chamber components on in-cylinder heat transfer
Jizu LV, Minli BAI, Long ZHOU, Jian ZHOU,
期刊论文
Fundamental buckling of circular plates with elastically restrained edges and resting on concentric rigid
Lokavarapu Bhaskara Rao, Chellapilla Kameswara Rao
期刊论文
Numerical analysis of hydrodynamic process of circular-translational-moving polishing (CTMP)
ZHAI Wenjie, LIU Changxiong, LIANG Yingchun
期刊论文
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