检索结果-内蒙古大学图书馆

Roller straightening process and FEM simulation for stainless steel clad plate

Open Mechanical Engineering Journal 2014年 8卷 557-561页

作者： He-Ong, Jin Ya-Li, Yi Xue-Yan, Han Yan, Liang Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of National Education Yanshan University Qinhuangdao China Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University Qinhuangdao China School of Mechanical Engineering Yanshan University Qinhuangdao China

Based on elasto-plastic deformation straightening theory and adopting 11 rolls plate straightening mode, the isothermal residual curvature straightening process is proposed for stainless steel clad plate. The straightening mathematical model is established to realize plate shape finishing and stress reforming. By using finite element analysis software, establishing straightening process and determining intermesh, the effects of intermesh on shape and residual stress are analyzed. The results indicate that the straightening process meet the finishing plainness of stainless steel clad plate after rolling. Longitudinal residual stress of the clad plate is evenly distributed across width. The cladding plate and steel substrate are symmetrical and the ascent of stress near the edge is greater. Longitudinal residual stress across length is distributed with the wave of pull-press-pull and the cladding plate and base plate are symmetrical. The above researches are based on the previous theory of the application of stainless steel clad plate straightening technology. © 2014, He-Rong et al.;Licensee Bentham Open.

关键词： Stainless steel

来源：评论

学校读者我要写书评

暂无评论

Reliability evaluation of bladder accumulator with no failure data

引用

High technology Letters 2018年第3期24卷 322-329页

作者：郭锐 Zhang Rongbing Zhao Jingyi Zhou Jinsheng Zhang Zhenmiao Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan UniversityKey Laboratory of Advanced Forging & Stamping Technology and Science (Yanshan University) College of Mechanical Engineering (Yanshan University) Qinhuangdao YSU -Yihua Electrical and Mechanical Engineering Technology Research Institute Co. Ltd.

As a bladder accumulator is a high reliable and long life component in a hydraulic system,its cost is high and it takes a lot of time to test its reliability,therefore,a reliability test with small sample is performed,and no failure data is obtained using the method of fixed time truncation. In the case of Weibull distribution,a life reliability model of bladder energy storage is established by Bayesian method using the optimal confidence intervals method,a model of one-sided lower confidence intervals of the reliability and one-sided lower confidence intervals model of the reliability life are established. Results of experiments show that the evaluation method of no failure data under Weibull distribution is a good way to evaluate the reliability of the accumulator,which is convenient for engineering application,and the reliability of the accumulator has theoretical and practical significance.

关键词： bladder accumulator Weibull distribution fixed time truncation no failure data reliability assessment

来源：评论

学校读者我要写书评

暂无评论

Influence of liquid film thickness on bearing characteristics of magnetic-liquid suspension guide-way

Influence of liquid film thickness on bearing characteristic...

引用

19th International Conference of Fluid Power and Mechatronic Control Engineering 2018

作者： Zhao, Jianhua Zhang, Bin Chen, Tao Wang, Qiang Gao, Dianrong Key Laboratory of Advanced Forging and Stamping Technology and Science Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Qinhuangdao066004 China

The magnetic-liquid suspension guide-way (MLSG) adopts the double support form of permanent magnetic suspension and hydrostatic pressure. It can greatly enhance the bearing capacity and rigidity of the guide-way system. The liquid film thickness is the main influencing factor on both the bearing capacity of the hydrostatic system and the permanent magnetic force. This paper analysed the effect of liquid film thickness on the static, dynamic and vibration index of MLSG. Firstly, this paper introduced the structural characteristics and supporting mechanism of MLSG. Secondly, based on flow equation, the static pressure equation, the permanent magnetic force equation and the force balance equation, the transfer function of single DOF supporting system of MLSG in constant flow supply mode is presented, and analysed the influence of the thickness of liquid film on single DOF supporting performance of MLSG. The results show that with the increase of the thickness of the liquid film, the bearing capacity of guide-way, the static stiffness, the dynamic stiffness and the natural frequency decrease, and the adjust time, the total power loss, the amplitude amplification coefficient increases, the phase margin is almost unchanged. The study can provide a theoretical basis for the design of MLGS in engineering practice. © 2019 Institution of Engineering and technology. All rights reserved.

关键词： Bearing capacity

来源：评论

学校读者我要写书评

暂无评论

Combination resonances of field modulated magnetic gear system considering eccentricity

引用

Journal of Information and Computational science 2014年第9期11卷 3037-3046页

作者： Yuan, Xiaoming Hao, Xiuhong Du, Bing Zhang, Lijie Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Qinhuangdao 066004 China Key Laboratory of Advanced Forging and Stamping Technology and Science Ministry of Education of China Yanshan University Qinhuangdao 066004 China School of Mechanical Engineering Yanshan University Qinhuangdao 066004 China

Considering the torque ripples caused by the component eccentricities of Field Modulated Magnetic Gear (FMMG) system, a dynamic model and the corresponding dynamic differential equations are founded. The formulae of the resonance responses are deduced and the laws of the combination resonances of FMMG system are discussed. The results show that the component eccentricities have little effects on the maximum torques, but the ripples of the dynamic torques increase, especially the dynamic torque on the inner rotor. The frequencies of the system resonances agree with the excitation frequencies and there are the interactive modulation phenomena between the displacements of all parts. Because the magnetic coupling stiffnesses are much smaller than the supporting stiffnesses of all parts, the relative deflections of two Degree of Freedoms (DOFs) are much bigger than the relative deflections of other DOFs. The resonances will badly deteriorate the dynamic behaviors of FMMG system and must be got much attention. Copyright © 2014 Binary Information Press.

关键词： Dynamic models

来源：评论

学校读者我要写书评

暂无评论

Experimental Study on Mechanical Response of Q235 Steel Under Cyclic Stress Loading 13th

Experimental Study on Mechanical Response of Q235 Steel Unde...

引用

13th International Conference on the technology of Plasticity, ICTP 2021

作者： Zhang, Qingling Jin, Miao Guo, Baofeng Li, Qun School of Mechanical Engineering Yanshan University Qinhuangdao066004 China Key Laboratory of Advanced Forging & Stamping Technology and Science Ministry of Education of China Yanshan University Qinhuangdao066004 China

ISBN: (纸本)9783030753801

The cyclic softening/hardening, ratcheting effect, and Bauschinger effect usually occur in the body structure of large mechanical equipment under cyclic loading. This manuscript focuses on Q235 steel commonly used in the welded frame of large mechanical equipment. The experiments were carried out with mean stress varying from −60 to 60 MPa and stress amplitude varying from 300 to 340 MPa, respectively, and the mechanical responses were analyzed comprehensively. The experimental results show that Q235 steel exhibits cyclic softening characteristics at positive mean stress and cyclic hardening characteristics at negative mean stress. The larger the stress amplitude or the absolute value of the mean stress, the greater the absolute value of ratcheting strain. At the same stress amplitude, when the absolute value of the mean stress is equal, the Bauschinger coefficient is almost equal. Based on the experimental results, the evolution formula of ratcheting strain is established by a phenomenological method. © 2021, The Minerals, Metals & Materials Society.

关键词： Loading

来源：评论

学校读者我要写书评

暂无评论

Error modeling for the leg mechanism of the quadruped walking chair robot

Error modeling for the leg mechanism of the quadruped walkin...

引用

International Conference on Applied System Innovation, ICASI 2015

作者： Wang, H.B. Wang, S.S. Wen, Y.H. Chen, N. Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University QinhuangdaoHeBei Province China Key Laboratory of Advanced Forging and Stamping Technology and Science Yanshan University QinhuangdaoHeBei Province China

ISBN: (纸本)9781138028937

To reduce the output error of the parallel robot, it is crucial to analyze the pose error of the parallel mechanism. This paper deals with the pose error analysis, and establishes the model for the effects of pose parameters and structural parameters on the accuracy of the leg mechanism. Firstly, based on the research of constraint relations on the leg mechanism of the walking chair robot, the error model is established. Then the influence of structure parameters and pose parameters on the pose error is studied. The results contribute a lot to the determination of the structural parameters and the output error of the control system. © 2016 Taylor & Francis Group, London.

关键词： Errors

来源：评论

学校读者我要写书评

暂无评论

Auto-establishing simulation parallel manipulators with linear legs and auto-solving their workspaces by utilizing CAD variation geometry

引用

International Journal of Computers and Applications 2017年第4期39卷 220-233页

作者： Lu, Yi Bi, Cuicui Ye, Nijia Bo, Hu College of Mechanical Engineering Yanshan University Qinhuangdao China Parallel Robot and Mechatronic System Laboratory of Hebei Province Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of National Education Yanshan University QinhuangdaoHebei China Hebei Hanguang Industry CO. LTD Hebei China

A new approach of CAD variation geometry is proposed for automatically establishing the simulation mechanisms of parallel manipulators (PMs) with linear legs, and automatically solving their forward displacements, workspaces, and Euler angles. First, the basic concepts and techniques of the CAD variation geometry are described. Second, a program is developed by utilizing new approach. In the developed software, an interface is constructed for inputting given parameters and outputting solved results of data and graphs, several sub-programs are compiled for automatically establishing various simulation mechanisms, solving the forward displacements, and solving/ displaying reachable workspaces and Euler angles of various PMs. Third, the three novel and five existing different PMs are illustrated. When the given parameters of the PMs into the interface are inputted, their simulation mechanisms are established automatically. The displacements, the reachable workspaces, and the Euler angles are solved automatically. Finally, the solved results of the developed software are verified by that of the analytic solutions of several existing PMs and the simulation solutions of several novel PMs. © 2017 Informa UK Limited, trading as Taylor & Francis Group.

关键词： Geometry

来源：评论

学校读者我要写书评

暂无评论

Design and Analysis of a Novel Ring Truss Deployable Antenna Mechanism 16th

Design and Analysis of a Novel Ring Truss Deployable Antenna...

引用

16th International Conference on Intelligent Robotics and Applications, ICIRA 2023

作者： Han, Bo Yuan, Zhantu Zhou, Yuanzhi Liu, Feng Yao, Jiantao Zhao, Yongsheng Hebei Provincial Key Laboratory of Parallel Robot and Mechatronic System Yanshan University Qinhuangdao066004 China Key Laboratory of Advanced Forging and Stamping Technology and Science Yanshan University Ministry of Education of China Qinhuangdao066004 China

ISBN: (纸本)9789819965038

With the development of astronautics, satellite antenna as an important communication equipment has also gradually developed to large scale. In this paper, a novel ring truss deployable antenna mechanism is proposed. The mechanism has three layers of installation points with height differences between them, which can be used to ensure that all the installation points will be distributed on the profile of the cable network, and this characteristic ensures the mechanism can be utilized to the maximum. Then the degrees of freedom (DOF) and kinematics of the ring truss deployable mechanism are analyzed using screw theory, where the analysis shows that the DOF of the overall ring truss deployable mechanism is equal to one. Following that, the dynamics model about the mechanism unit is established using the second type of Lagrange equations. Based on this dynamic model, the effect of torsion spring stiffness on the deployment process is discussed and the conclusion is verified by simulation. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Trusses

来源：评论

学校读者我要写书评

暂无评论

Processing and simulation of thin-walled shell with inner ribs formed by inner spinning technology

Processing and simulation of thin-walled shell with inner ri...

引用

International Conference on Industrial, Mechanical and Manufacturing science, ICIMMS 2014

作者： Wang, Zhenjie Guo, Baofeng Ma, Shicheng Education Ministry Key Laboratory of Advanced Forging and Stamping Science and Technology College of Mechanical Engineering Yanshan University QinhuangdaoHebei China Special Material and Technic Institution of Aerospace Beijing China

ISBN: (纸本)9781138026568

The formation of a thin-walled shell structure with inner ribs by inner spinning technology was simulated using the finite element simulation softwareABAQUS. The spinning force and deformation condition were calculated and analyzed in this simulation. Results indicate that a thin-walled cylindrical shell with uniform deformation can be obtained using the inner spinning process with good forming effect. For all the regions, the radial load was found to be greater than the axial load, with the radial load in the range of 0–270 kN. The skin and the back frame sections experience load peaks, which is in the expansion capacity of −200mm for the skin section. The peak load in the rear frame section is stable in a 15mm stroke, which then gradually decreases to zero. The forming load in the front frame increases with the increase in the feed load of the spinning wheel, leading to the possibility of fracture in this region. The axial spinning load is rather small in the range of 0–47 kN. Based on the simulated values of these parameters, we demonstrated the formation of good quality 2A12 aluminum alloy products using the inner spinning technology. © 2015 Taylor & Francis Group, London.

关键词： Deformation

来源：评论

学校读者我要写书评

暂无评论

Design and experimental study of the remote control for a novel patient transfer apparatus 5

Design and experimental study of the remote control for a no...

引用

2020 5th International Seminar on Computer technology, Mechanical and Electrical Engineering, ISCME 2020

作者： Tian, Yu Wang, Hongbo Zhang, Yongshun Tian, Junjie Du, Jiazheng Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University Qinhuangdao Hebei China Key Laboratory of Advanced Forging and Stamping Technology and Science of Ministry of Education Yanshan University Qinhuangdao Hebei China

This paper introduces the design of the remote control for a novel patient transfer apparatus. First, the overall design of the control system is put forward based on the working principle, and design requirements of the apparatus. Second, voltage regulator circuit of the remote control based on the MC34063 is designed to fit for the OLED displayer, parameters such as the filter capacitor have been determined. Next, wireless communication unit adopted CC1110 and the communication instruction code is introduced. Then, the interaction interface of the remote control is finished to facilitate the implementation of the adjustment functions. finally, a simulation and a real experiment has been completed, it indicates the correctness of the voltage regulator circuit and the effectiveness of the remote control respectively. © Published under licence by IOP Publishing Ltd.

关键词： Remote control

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：