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数智化赋能传统产业转型升级

中国科学院院刊 2024年第7期39卷 1183-1190页

作者：臧冀原季桓永黄庆学中国工程院战略咨询中心北京100088 北京信息科技大学经济管理学院北京100192 太原理工大学机械与运载工程学院太原030024

传统产业是经济高质量发展的基本支撑和基本动力,其数智化过程是促进新、旧动能转换和全球价值链跃迁的重要抓手。文章从数字化、网络化、智能化角度解构数智化丰富内涵,在剖析数智化驱动我国传统产业转型升级的机制及路径基础上,分析... 详细信息

传统产业是经济高质量发展的基本支撑和基本动力,其数智化过程是促进新、旧动能转换和全球价值链跃迁的重要抓手。文章从数字化、网络化、智能化角度解构数智化丰富内涵,在剖析数智化驱动我国传统产业转型升级的机制及路径基础上,分析了当前传统产业数智化进程所面临的障碍。文章最后从(1)继续实施大规模技术升级工程,切实降低数智化改造成本;(2)完善赋能平台建设,优化服务评价体系;(3)打通数智化改造堵点,关键核心领域形成突破;(4)建立面向数智化前沿的复合型人才培养机制4个方面提出了数智化赋能传统产业转型升级的对策建议。

关键词：数智化数字化网络化智能化传统产业转型升级

Effect of Reduction on Bonding Interface of Hot-rolled Wear-resistant Steel BTW1/Q345R Cladding Plate

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Journal of Wuhan University of Technology(Materials Science) 2018年第4期33卷 952-958页

作者：支晨琛马立峰 huang qingxue huang Zhiquan LIU Pengtao The Coordinative Innovation Center of Taiyuan Heavy Machinery Equipment Taiyuan University of Science and TechnologyTaiyuan 030024China Shanxi Provincial Key Laboratory of Metallurgical Equipment Design and Technology Taiyuan University of Science and TechnologyTaiyuan 030024China School of Mechanical Engineering Taiyuan University of TechnologyTaiyuan 030024China

Wear-resistant cladding plates consisting of a substrate（Q345 R） and a clad layer（BTW1） were bonded through hot rolling at the temperature of 1 200 ℃ and a rolling speed of 0.5 m/s. The microhardness of the cladding plate was also tested after being heat treated. The microstructure evolution on the interface of BTW1/Q345 R sheets under various reduction rates was investigated with a scanning electron microscope（SEM） and EBSD. It is found that the micro-cracks and oxide films on the interface disappear when the reduction is 80%, whereas the maximum uniform diffusion distance reaches 10 μm. As a result, a wide range of metallurgical bonding layers forms, which indicates an improved combination between the BTW1 and the Q345 R. Additionally, it is discovered that the unbroken oxide films on the interface are composed of Mn, Si or Cr at the reductions of 50% and 65%. The SEM fractography of tensile specimen demonstrates that the BTW1 has significant dimple characteristics and possesses lower-sized dimples with the increment in reduction, suggesting that the toughness and bonding strength of the cladding plates would be improved by the increase of reduction. The results reveal that a high rolling reduction causes the interfacial oxide film broken and further forms a higher-sized composite metallurgical bonding interface. The peak microhardness is achieved near the interface.

关键词： BTW1/Q345R clad plate hot-rolled bonding reduction oxide films fractography

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二十辊轧机辊系耦合振动特性及振动控制

振动与冲击 2024年第7期43卷 278-289页

作者：孔祥岚和东平徐慧东王涛黄庆学太原理工大学机械与运载工程学院太原030024 先进金属复合材料成形技术与装备教育部工程研究中心太原030024

精密极薄带因具备高精度、耐腐蚀、优异表面光洁度等性能,被广泛应用于微制造、微电子等高技术领域。二十辊轧机辊系的耦合振动对极薄带的生产有着重要的影响。考虑到轧制工艺和润滑状态等变化形成非线性轧制界面,建立了一种二十辊轧机... 详细信息

精密极薄带因具备高精度、耐腐蚀、优异表面光洁度等性能,被广泛应用于微制造、微电子等高技术领域。二十辊轧机辊系的耦合振动对极薄带的生产有着重要的影响。考虑到轧制工艺和润滑状态等变化形成非线性轧制界面,建立了一种二十辊轧机辊系耦合动力学模型。应用多尺度法求解主共振和内共振的幅频特性方程,分析了不同参数对幅频特性曲线的影响。基于奇异性理论探究了不同参数与系统分岔的关系。同时,根据李雅普诺夫一次近似稳定性判据,结合系统动相平面相轨迹图,对系统稳定性进行判断分析。然后,基于Washout filter控制器原理设计了一种状态反馈控制器,通过对系统进行状态空间表达式变换,分析了控制增益对幅频特性的影响。利用时域图、相位图、频谱图以及Poincaré截面图进行仿真对比,验证了所设计控制器的可行性和有效性,为二十辊轧机振动及其控制的研究提供了一定的理论指导。

关键词：二十辊轧机非线性轧制界面多尺度法幅频特性稳定性 Washout filter控制器

基于平均法的余弦激励分数阶振子系统动力学分析

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工程数学学报 2024年第4期41卷 623-641页

作者：师玮郭蓉解加全张彦杰王涛黄庆学太原理工大学机械与运载工程学院太原030024 金属成形技术与重型装备全国重点实验室太原030024 先进金属复合材料成形技术与装备教育部工程研究中心太原030024 中北大学理学院太原030051

提出了一种求解余弦激励下分数阶振子系统位移响应的解析和数值算法。其中解析方法是用平均法来求出系统的稳态响应解和瞬态响应解,总位移响应解即为稳态解和瞬态解的总和。提出一种数值方法,利用Grunwald-Letnikov分数阶导数的定义将... 详细信息

提出了一种求解余弦激励下分数阶振子系统位移响应的解析和数值算法。其中解析方法是用平均法来求出系统的稳态响应解和瞬态响应解,总位移响应解即为稳态解和瞬态解的总和。提出一种数值方法,利用Grunwald-Letnikov分数阶导数的定义将系统中的分数阶微分项进行离散化处理,降低了原系统阶数。在一般的周期激励下,系统的近似响应解可以采用傅里叶级数展开法和线性系统叠加原理得到。最后,利用数值模拟对所提方法的有效性和可行性进行了验证,并对分数阶阶次、线性阻尼系数和分数阶导数系数对系统稳态响应振幅和总位移响应的影响进行了分析。

关键词：平均法分数阶振子系统 Grunwald-Letnikov分数阶导数位移响应

SELF-ALIGNING EVEN LOAD MECHANISM OF MULTI-ROW BEARINGS OF LARGE STRIP ROLLING MILL

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Chinese Journal of Mechanical Engineering 2006年第2期19卷 246-250页

作者： huang qingxue LI Yugui SHEN Guangxian CHEN Zhanfu SHU Xuedao SHI Rong ZHA0 Hongwei CHEN Buquan College of Material Engineering Taiyuan University of Science and TechnologyTaiyuan 030024 China Department of Machinery Yanshan UniversityQinhuangdao 066004 China Hot Mill Plant Baoshan I＆S Group Co.Shanghai 200030 China

The load distribution of multi-row bearings of large strip rolling mill is fully analyzed by 3D contact boundary element method （BEM）. It is found out that bearings are frequently worn out due to serious uneven load on the multi-row rollers. The constraint mechanism of the previous rolling system is found to be unreasonable by theoretical analysis on heavy machinery structure. A mechanism of self-aligning even load for workroll bearing of 2 050 mm hot rolling mill of Baoshan I＆S Co. is developed. This device is manufactured with particular regard to the structure of 2 050 mm hot rolling mill mentioned above. Hence, uneven load on multi-row bearings is greatly relieved and their lives are remarkably prolonged. Meanwhile, theoretical analysis and on-spot tests prove the rationality and validity of the device.

关键词： Strip rolling mill Multi-row bearings Loading features

Analysis of Dynamic Characteristics of Forced and Free Vibrations of Mill Roll System Based on Fractional Order Theory

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Journal of Beijing Institute of Technology 2023年第5期32卷 640-652页

作者： Li Jiang Tao Wang qingxue huang School of Mechanical Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China College of Intelligent Manufacturing Chengdu Technological UniversityChengdu 611730China College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024China

In this paper,the main researches are focused on the horizontal nonlinear vibration characteristics of roll systems for rolling mill,mainly including the study of forced vibration and free vibration of the roller.Firstly,the nonlinear damping parameters and nonlinear stiffness parameters within interface of the rolling mill are both considered,and a fractional-order differential term is also introduced to model the horizontal nonlinear vibration.Secondly,the averaging method is introduced to solve the forced vibration system of the mill roll system,and the amplitude-frequency characteristic curves of the system are obtained for different orders,external excitation amplitudes,stiffness and fractional order coefficients.Thirdly,the amplitude-frequency and phasefrequency characteristics of the free vibration of the mill roll system are investigated at different fractional orders.Then,the accuracy of the averaging method for solving the dynamic characteristics of the system is verified by numerical analysis,and the effect of the fractional differential term coefficients and order on the dynamic characteristics of the roll system are investigated.Finally,the time-frequency characteristics and phase-frequency characteristics of free vibration systems at different fractional orders are studied.The validity of the theoretical study is also verified through experiments.

关键词： roller system fractional-order average method forced vibration free vibration

Recent advances and trends in roll bonding process and bonding model:A review

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Chinese Journal of Aeronautics 2023年第4期36卷 36-74页

作者： Zixuan LI Shahed REZAEI Tao WANG Jianchao HAN Xuedao SHU Zbigniew PATER qingxue huang College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030002China Institute of Materials Science Technische Universita¨t DarmstadtDarmstadt 64287Germany Faculty of Mechanical Engineering&Mechanics Ningbo UniversityNingbo 315211China Faculty of Mechanical Engineering Lublin University of TechnologyLublin20618Poland

This review presents a thorough survey of the roll bonding process with a focus on the bimetallic bars/tubes as well as the bonding models and criteria.The review aims to provide insight into cold,hot and cryogenic bonding mechanisms at the micro and atomic scale and act as a guide for researchers working on roll bonding,other joining processes and bonding simulation.Mean-while,the shortcomings of roll bonding processes are presented from the aspect of formable shapes,while bonding models are shown from the aspect of calculation time,convergence,interface behav-ior of dissimilar materials as well as hot bonding status prediction.Two well-accepted numerical methodologies of bonding models,namely the contact algorithm and cohesive zone model(CZM)of bonding models and in simulations of the bonding process are highlighted.Particularly,recent advances and trends in the application of the combination of mechanical interlocking and metallurgical bonding,special energy fields,gradient structure,novel materials,green technology and soft computing method in the roll bonding process are also discussed.The challenges for advancing and prospects of the roll bonding process and bonding model are presented in an attempt to shed some light on the future research direction.

关键词： Bimetallic Bonding mechanism Bonding model Numerical simulation Roll bonding process

Prediction and Analysis of the Force and Shape Parameters in Variable Gauge Rolling

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Chinese Journal of Mechanical Engineering 2022年第4期35卷 79-92页

作者： Yuanming Liu Zhenhua Wang Tao Wang Jie Sun Xianguang Zheng Dianhua Zhang qingxue huang College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024China Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment Ministry of EducationTaiyuan 030024China TYUT-UOW Joint Research Center Taiyuan University of TechnologyTaiyuan 030024China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China

Variable gauge rolling is a new process to obtain a plate for which the thickness changes continuously by continuously and dynamically adjusting the roll gap upward and downward in the rolling process.This technology is an efective method for producing lightweight,low-cost,and economical plates.However,variable gauge rolling is an unsteady process,and the changes in the force and deformation parameters are complex.In this research,based on the minimum energy theory of the variational principle and considering the characteristics of the roll movement and workpiece deformation comprehensively,the internal plastic deformation,friction,shear and tension powers,and the minimum result of the total power functional in upward and downward rolling are obtained with the frst integral and then with a variation of adopting the specifc plastic power and strain rate vector inner product.The analytical results of the deformation and force parameters are also established using the variational method.Then the precision of this model is certifed using the measured values in a medium plate hot rolling plant and the experimental data for Tailor Rolled Blank rolling.Good agreement is found.Additionally,the variation rule of bite angle,neutral angle,and location neutral points are shown,and the change mechanism of the friction parameter on the stress state efect coefcient is given in variable gauge rolling.This research proposes a new mathematical model for rolling process control that provides a scientifc basis and technical support for obtaining an accurate section shape in variable gauge rolling production.

关键词： Variable gauge rolling Analytical solution Roll separating force Energy method Neutral point

Resonance and Bifurcation of Fractional Nonlinear Systems with Power Damping Term for Robot Grinding

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Journal of Beijing Institute of Technology 2023年第1期32卷 23-40页

作者： Wei Shi qingxue huang Jinzhu Zhang Tao Wang Ziliang Li Yanjie Zhang Xiaoyan Xiong College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024China Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China Institute of Advanced Forming and Intelligent Equipment Taiyuan University of TechnologyTaiyuan 030024China

A fractional nonlinear system with power damping term is introduced to study the forced vibration system in order to solve the resonance and bifurcation problems between grinding wheel and steel bar during robot grinding.The robot,grinding wheel and steel bar are reduced to a spring-damping second-order system model.The implicit function equations of vibration amplitude of the dynamic system with coulomb friction damping,linear damping,square damping and cubic damping are obtained by average method.The stability of the system is analyzed and explained,and the stability condition of the system is proposed.Then,the amplitude-frequency characteristic curves of the system under different fractional differential orders,nonlinear stiffness parameters,fractional differential term coefficients and external excitation amplitude are analyzed.It is shown that the fractional differential term in the dynamic system is the damping characteristic.Then the influence of four kinds of damping on the vibration amplitude of the system under the same parameter is investigated and it is proved that the cubic damping suppresses the vibration of the system to the maximum extent.Finally,based on the idea that the equilibrium point of the system is the constant part of the Fourier series expansion term,the bifurcation behavior caused by the change of damping parameters in linear damping,square damping and cubic damping systems with different values of fractional differential order is investigated.

关键词： robot grinding fractional system average method power damping resonance and bifurcation