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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
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
张于贤,廖振方,王红,裴江红
《中国工程科学》 2005年 第7卷 第11期 页码 72-75
基于厚壁圆筒的弹性失效准则所确定的圆筒的初始屈服压力与材料的屈服极限的关系,设计了一种测定厚壁圆筒初始屈服压力的实验方法,并测得了一组实验数据。通过对该实验数据的分析得到了圆筒的初始屈服压力。该实验值与理论值误差较小,表明了该实验方法具有较好的可靠性。
Combustion characteristics of SI engine fueled with methanol-gasoline blends during cold start
SONG Ruizhi, LIU Shenghua, LIANG Xiaoqiang, Tiegang H U
《能源前沿(英文)》 2008年 第2卷 第4期 页码 395-400 doi: 10.1007/s11708-008-0081-7
关键词: combustion 3-cylinder indicated Cylinder pressure emission
Effects of Fischer-Tropsch diesel fuel on combustion and emissions of direct injection diesel engine
HUANG Yongcheng, WANG Shangxue, ZHOU Longbao
《能源前沿(英文)》 2008年 第2卷 第3期 页码 261-267 doi: 10.1007/s11708-008-0062-x
关键词: combustion pressure further HC operation single-cylinder
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.
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
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
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
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
Combustion and emissions of RP-3 jet fuel and diesel fuel in a single-cylinder diesel engine
《能源前沿(英文)》 2023年 第17卷 第5期 页码 664-677 doi: 10.1007/s11708-021-0787-3
龚进,谭青,赵喻明,衡保利
《中国工程科学》 2011年 第13卷 第3期 页码 71-76
针对现有油缸检测系统检测手段和技术落后及检测精度低等缺点,提出把测试项目模块化后,将模块有机组织在液压缸运行过程中来完成油缸检测的控制策略。运用PLC(programmable logic controller,可编程控制器)控制、CoDeSys组态软件和Visual Basic 6.0技术设计了一套油缸实时检测系统。试验结果表明,新的测试系统实现了实时检测、试验数据和曲线以及试验报告的输出和打印,提高了检测效率。
Impact of oxygen enriched combustion on the performance of a single cylinder diesel engine
K. RAJKUMAR, P. GOVINDARAJAN
《能源前沿(英文)》 2011年 第5卷 第4期 页码 398-403 doi: 10.1007/s11708-011-0157-7
关键词: oxygen enriched combustion exhaust gas temperature brake power (BP) specific fuel consumption (SFC)
Imaging studies of in-cylinder HCCI combustion
Pawel LUSZCZ, Hongming XU, Mirek WYZSNSKI, Xiao MA, Rob STEVENS, Athanasios TSOLAKIS
《能源前沿(英文)》 2011年 第5卷 第3期 页码 313-321 doi: 10.1007/s11708-011-0154-x
关键词: high speed imaging combustion homogenous charge compression ignition (HCCI) reaction spreading velocity
孙玲玲
《中国工程科学》 2000年 第2卷 第12期 页码 78-83
介绍作者开发的一种汽油机用新型燃料,为检验其品质,对发动机缸内过程参数进行了全面测试分析。结果表明:汽油机燃用轻油基混合燃料时无爆震,动力性稍低于燃用汽油,缸内过程参数标准偏差明显低于燃用汽油。这充分说明,所开发的轻油基混合燃料品质优良,适于汽油机使用。
标题 作者 时间 类型 操作
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
Combustion characteristics of SI engine fueled with methanol-gasoline blends during cold start
SONG Ruizhi, LIU Shenghua, LIANG Xiaoqiang, Tiegang H U
期刊论文
Effects of Fischer-Tropsch diesel fuel on combustion and emissions of direct injection diesel engine
HUANG Yongcheng, WANG Shangxue, ZHOU Longbao
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
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
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
Impact of oxygen enriched combustion on the performance of a single cylinder diesel engine
K. RAJKUMAR, P. GOVINDARAJAN
期刊论文
Imaging studies of in-cylinder HCCI combustion
Pawel LUSZCZ, Hongming XU, Mirek WYZSNSKI, Xiao MA, Rob STEVENS, Athanasios TSOLAKIS
期刊论文