检索结果-内蒙古大学图书馆

Journal of Central South University 2024年第5期31卷 1412-1425页

作者：纪开盛刘艳雄张怡俊宋燕利尹飞魏文婷 Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070China Hubei Engineering Research Center for Green Precision Material Forming Wuhan University of TechnologyWuhan 430070China Hubei Key Collaborative Innovation Center for Automotive Components Technology Wuhan University of TechnologyWuhan 430070China

随着航空航天工业的迅速发展,对微型化Inconel 718薄板构件的需求越来越大。然而,晶粒尺寸显著影响金属薄板的塑性变形行为,在很大程度上限制了Inconel 718薄板构件的生产和应用。本文对不同晶粒尺寸的Inconel 718薄板进行了一系列单轴... 详细信息

随着航空航天工业的迅速发展,对微型化Inconel 718薄板构件的需求越来越大。然而,晶粒尺寸显著影响金属薄板的塑性变形行为,在很大程度上限制了Inconel 718薄板构件的生产和应用。本文对不同晶粒尺寸的Inconel 718薄板进行了一系列单轴拉伸试验和扫描电镜实验,研究了晶粒尺寸对其塑性变形行为的影响。通过EBSD技术表征了晶粒尺寸、晶粒取向和晶粒平均取向偏差,阐明了晶粒尺寸效应的变形机制。研究结果表明,随着晶粒尺寸的增大,在拉伸应力作用下,晶粒旋转和协调变形机制减弱,取向转变为<232>的晶粒数量逐渐减少,从而导致屈服强度和最大抗拉强度显著降低;此外,随着晶粒尺寸的增大,晶粒内部的塑性变形明显减弱,晶界滑动逐渐成为拉伸过程中主要的变形机制,导致断裂应变减小,韧性断裂特征减弱。本文综合考虑晶粒尺寸和应变量影响,建立了能够应用于Inconel 718薄板的微成形研究的混合材料本构模型。

关键词： Inconel 718薄板晶粒尺寸力学性能断裂机理混合材料本构模型

来源：评论

学校读者我要写书评

暂无评论

Densifìcation mechanism of antimony-doped tin oxide ceramics by spark plasma sintering

Densifìcation mechanism of antimony-doped tin oxide ceramic...

引用

2014 Dianchi advanced Materials Forum

作者： Li, Qi Zhong Li, Qi Chang Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan China School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology Wuhan China

ISBN: (纸本)9783038353348

SnO2 ceramics were synthesized by SPS. Phase compositions and microstructures are examined by XRD, SEM and EDS, respectively. Sb2O3 used in our research were beneficial to lower the sintering temperature and promote the densifìcation of SnO2 ceramics. The SEM results show a homogeneous microstructure is approached consistent with the density measurement at 850-1000 °C. The XRD show all antimony ions came into the lattice of SnO2 to substitute for tin ions when the content of Sb2O3 are 0.1-2.5 mol%. The grain boundary are no SnO and Sb2O3, only SnO2. The mechanism of SPS sintering process is the local high temperature to produce the abnormal growth of the grain, and evaporation-condensation;and solid solution of Sb3+ go into the SnO2 lattice produce oxygen vacancy to promote densifìcation © (2014) Trans Tech Publications, Switzerland.

关键词： Ceramic materials

来源：评论

学校读者我要写书评

暂无评论

Residual Value Evaluation of Operating Pure Electric Vehicles Based on Machine Learning 7

Residual Value Evaluation of Operating Pure Electric Vehicle...

引用

2021 7th International Conference on Manufacturing technology and Applied Materials, ICAMMT 2021

作者： Wang, Yujiu Huang, Miaohua Chen, Kailun Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Research Center for New Energy and Intelligent Connected Vehicle Wuhan University of Technology Wuhan430070 China

In view of the current imperfect second-hand evaluation system for new energy vehicles, there are limitations such as simple evaluation models, strong subjectivity, and large evaluation differences. This paper establishes the residual value evaluation model for operating pure electric vehicles, combining actual vehicle operation and maintenance data and establishes the residual value rate evaluation model based on the XGBoost algorithm and Boosted Trees enhanced algorithm. The multi-dimensional feature data of vehicle type, service time, mileage and region are extracted by feature engineering, and the evaluation system of residual value rate correction coefficient is established based on AHP. Finally, based on residual value rate evaluation model and the residual value rate correction coefficient system model to optimize the replacement cost method evaluation model, thereby constructing a complete residual value evaluation model. The model is based on actual vehicle operating data and machine learning algorithms, which has strong pertinence and real-time for the residual value evaluation of pure electric vehicles. © Published under licence by IOP Publishing Ltd.

关键词： Machine learning

来源：评论

学校读者我要写书评

暂无评论

Optimal braking control for an independent four wheel-motor-driven electric vehicle 6

Optimal braking control for an independent four wheel-motor-...

引用

6th Hybrid and Electric Vehicles Conference, HEVC 2016

作者： Yu, Houyu Wood, Alastair Strang Huang, Miaohua Qi, Hongsheng Hubei Key Laboratory of Advanced Technology for Automotive Components Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan China School of Engineering University of Bradford Bradford United Kingdom School of Automotive Engineering Wuhan University of Technology Wuhan China

ISBN: (纸本)9781785612947

The lightweight, integrated, and high performance motor-wheel driven electric vehicle is clean, energy saving, and safe, and has the potential to form the ideal electric vehicle for the future. This paper proposes an optimal fuzzy neural network braking control strategy to determine the allocation of the front and rear regenerative braking torque and friction braking torque for the independent four Wheel-Motor-Driven (4WMD) electric vehicle. The proposed fuzzy neural network controller applies a five-layered neural network to map relations between the inputs (required total braking torque and battery State Of Charge (SOC)) and the outputs (front and rear in-wheel-motor regenerative braking torques), and uses a genetic algorithm to optimize offline the weights and thresholds of this fuzzy neural network to determine the dynamic allocation of the front and rear in-wheel-motor regenerative braking torque and friction braking torque. The objective is to maximize the battery SOC at the end of braking, and the constraints are the required braking speed of the vehicle, the limited regenerative braking torque of an in-wheel-motor, and the allowable SOC range of the battery. A lightweight independent 4WMD electric vehicle model (including vehicle longitudinal dynamic model, tyres, in-wheel motors, batteries and disc brakes) and this fuzzy neural network braking control model are built in the Matlab/Simulink environment, and are simulated and validated under different braking scenarios. The simulation results illustrate that this optimal braking control is better than the simple rule-based braking control, recovering more regenerative braking energy while meeting the vehicle braking performance requirements. © 2016, Institution of Engineering and technology. All rights reserved.

关键词： Fuzzy neural networks

来源：评论

学校读者我要写书评

暂无评论

CFD Analysis of Fluid-Dynamic and Heat Transfer Effects Generated by a Fixed Electricity Transmission Line Interacting with an External Wind

引用

Fluid Dynamics & Materials Processing 2022年第2期18卷 329-344页

作者： Yajuan Jia Lisha Shang Jiangping Nan Guangping Hu Zhigang Fang Xi’an Traffic Engineering Institute Xi’anChina Xi’an Yuanai Electronic Technology Co. Ltd.Xi’anChina School of Automotive Engineering Wuhan University of TechnologyWuhanChina Hubei Key Laboratory of Advanced Technology of Automotive Components Wuhan University of TechnologyWuhanChina

The flow past a fixed single transmission conductor and the related heat transfer characteristics are investigated using computational fluid dynamics and a relevant turbulence *** validating the method through comparison with relevant results in the literature,this thermofluid-dynamic problem is addressed considering different working *** is shown that the resistance coefficient depends on the Reynolds *** expected,the Nusselt number is also affected by Reynolds *** particular,the Nusselt number under constant heat flux is always greater than that under a constant wall temperature.

关键词： Flow characteristics heat transfer characteristics fluid mechanics Reynolds number

来源：评论

学校读者我要写书评

暂无评论

Influences of key Forging Parameters on Cold Orbital Forging of Thin Parts with High Circular Ribs 13th

Influences of Key Forging Parameters on Cold Orbital Forging...

引用

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

作者： Zhuang, Wuhao Han, Xinghui Hua, Lin Feng, Wei School of Automotive Engineering Wuhan University of Technology Wuhan430070 China Hubei Key Laboratory of Advanced Technology of Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan430070 China

ISBN: (纸本)9783030753801

In this paper, a cold orbital forging process is proposed to manufacture thin parts with high circular ribs. First, a FE model was established for the numerical process analysis. Then a verification experiment was performed to verify the validity of the FE model developed above. By using the FE simulation method, the influences of several forging parameters on the cold orbital forging of thin parts with high circular ribs were investigated. The results show that effective strain can be obviously improved by increasing feed velocity of cavity die, but has less change with different friction factors. Synchronism of metal flowing between the inner rib and the outer rib can be improved by decreasing feed velocity of cavity die and friction factor. Moreover, the circumferential metal flowing degree can be slightly reduced by increasing feed velocity of cavity die and friction factor. © 2021, The Minerals, Metals & Materials Society.

关键词： Friction

来源：评论

学校读者我要写书评

暂无评论

State of Health Estimation for Lithium-Ion Batteries Under Different Temperature Conditions 4

State of Health Estimation for Lithium-Ion Batteries Under D...

引用

4th International Conference on Green Energy, Environment and Sustainable Development, GEESD 2023

作者： Du, Changqing Xiao, Di Ren, Zhong Qi, Rui Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of Advanced Energy Science and Technology Guangdong Laboratory Foshan528200 China Hubei Research Center for New Energy and Intelligent Connected Vehicle Wuhan University of Technology Wuhan430070 China

ISBN: (纸本)9781643684260

Accurate estimation of the lithium-ion batteries (LiBs) state of health (SOH) is vital for ensuring the safety and dependability of electric vehicles (EVs) throughout their life cycle. However, the traditional neural network estimation has low fitting accuracy, and most research in this field is based solely on normal temperature states. To address this, we propose extracting health factors (HFs) from battery data under different temperature states, employing the Gaussian process regression algorithm (GPR) to estimate SOH. We also examine the influence of various kernel functions on the estimation results of the GPR algorithm. © 2023 IOS Press BV. All rights reserved.

关键词： Lithium-ion batteries

来源：评论

学校读者我要写书评

暂无评论

Dynamic Response Study on the Collision Between Vehicle and W-Beam Guardrail 2

Dynamic Response Study on the Collision Between Vehicle and ...

引用

2nd International Conference on New Materials, Machinery, and Vehicle Engineering, NMMVE 2023

作者： Qiao, Weigao Zhou, Zhengquan Wuhan Huaxia Institute of Technology Wuhan430223 China Hubei Key Laboratory of Advanced Technology of Automotive Components Wuhan430070 China Wuhan University of Technology Wuhan430070 China

ISBN: (纸本)9781643684208

Guardrail, as the main security facilities, on the highway, can effectively prevent traffic accidents, and reduce loss of human's life and property. Therefore, it has a very significance for the study on the guardrail. Based on MADYMO, a multi-body car and finite element W-beam guardrail simulative impact model was established. Under the same initial impact conditions, according to analyzing the dynamic responses of the car and guardrail, a parameter study between the W-beam guardrail and its protective performance was made, and acquired several significant conclusions. © 2023 The authors and IOS Press.

关键词： Dynamic response

来源：评论

学校读者我要写书评

暂无评论

Design and manufacture of face-milling spiral non-circular bevel gear

Design and manufacture of face-milling spiral non-circular b...

引用

International Conference on Power Transmissions, ICPT 2016

作者： Hua, Lin Zheng, Fangyan Han, Xinghui Chen, Dingfang Li, Bo School of Automotive Engineering Hubei Key Laboratory of Advanced Technology of Automotive Components Wuhan University of Technology Wuhan China School of Logistics Engineering Wuhan University of Technology Wuhan China

来源：评论

学校读者我要写书评

暂无评论

Dynamic modeling and analysis for lateral-torsional coupling vibration of a bolted joint rotor system during speed-up process

引用

Communications in Nonlinear Science and Numerical Simulation 2025年 150卷

作者： Yuqi Li Bo Yang Chuanmei Wen Zhong Luo Bing Li School of Mechanical and Automotive Engineering Guangxi University of Science and Technology Liuzhou 545006 PR China Guangxi Key Laboratory of Automobile Components and Vehicle Technology Liuzhou 545006 PR China Engineering Research Center of Advanced Design and Manufacturing Technology of Heavy Vehicle Components Ministry of Education Guangxi University of Science and Technology Liuzhou 545006 PR China School of Electronic Engineering Guangxi University of Science and Technology Liuzhou 545006 PR China School of Mechanical Engineering & Automation Northeastern University Shenyang 110819 PR China

The time-varying contact states at the contact interface introduced local nonlinear mechanical behaviors of the bolted joint rotor, especially under varying speed condition. In this study, a lateral-torsional coupled dynamic model of a bolted joint rotor system is established using the lumped mass method, and the Iwan model is employed to characterize the interface contact behavior. The influence of contact mechanics on the dynamic characteristics of the rotor system is investigated under both steady-state and speed-up conditions. The results show that lateral contact leads to the appearance of lateral self-excited vibration frequencies in the lateral waterfall diagrams, as well as combined frequencies related to lateral self-excited vibrations in the torsional waterfall diagrams. Furthermore, acceleration introduces additional unbalanced forces, which enhance lateral-torsional coupling, while lower acceleration intensifies stiffness softening and reduces the critical speed. Finally, the simulation results are validated through experiments conducted on a bolted joint rotor test rig. This study proposes a lateral-torsional coupled dynamic model for bolted joint rotors considering interface contact, providing theoretical guidance for the dynamic design and analysis of such rotating machinery.

关键词：

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：