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Computer Modeling in Engineering & Sciences 2018年第1期114卷 75-93页

作者： chengquan wang Yonggang Shen Yun Zou Tianqi Li Xiaoping Feng School of Environment and Civil Engineering Jiangnan UniversityWuxiChina214122 College of Civil Engineering and Architecture Zhejiang UniversityHangzhouChina310058

The failure behavior of the precast prestressed concrete T girder was investigated by destructive test and finite-element analysis,and the mid-span deflection,girder stiffness and the variation of the cross section strain in the loading process were obtained,and the mechanical properties,mechanical behavior,elastic and plastic behavior and ultimate bearing capacity of T girder with large span were ***,the relationship between the beam stiffness degradation,the neutral axis in cross-section,steel yielding and concrete cracking are investigated and analyzed.A method was proposed to predict the residual bearing capacity of a bridge based on the variation of the position of the cross section strain distribution and the section neutral axis,which provided a theoretical basis for predicting the stiffness detection and carrying capacity assessment of prestressed concrete beam.

关键词： Prestressed concrete T-beam destructive testing finite-element stiffness plane-section assumption

Ductility and Ultimate Capacity of Concrete-Filled Lattice Rectangular Steel Tube Columns

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Structural Durability & Health Monitoring 2018年第2期12卷 99-110页

作者： chengquan wang Yun Zou Tianqi Li Jie Ding Xiaoping Feng Tiange Lei Jiangnan University No.1800Wuxi214000China

A kind of concrete-filled lattice rectangular steel tube(CFLRST)column was put *** numerical simulation was modeled to analyze the mechanical characteristic of CFLRST *** comparing the load-deformation curves from the test results,the rationality and reliability of the finite element model has been confirmed,moreover,the change of the section stiffness and stress in the forcing process and the ultimate bearing capacity of the column were *** on the model,the comparison of ultimate bearing capacity and ductility between CFLRST column and reinforced concrete(RC)column were also *** results of the finite element analysis show that the loading process of CFLRST column consists of elastic stage,yield stage and failure *** failure modes are mainly strength failure and failure of elastoplastic *** column has higher bearing capacities in comparison with reinforced concrete columns with the same steel *** addition,the stiffness degeneration of CFLRST column is slower than RC column and CFLRST column has good ductility.

关键词： Steel-concrete composite structure concrete-filled lattice rectangular steel tube column nonlinear finite element ultimate strength ductility

Design of a high-precision twin-roll strip caster

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Baosteel Technical Research 2019年第3期13卷 8-13页

作者： YE Changhong QIAO Jianji wang chengquan Research Institute Baoshan Iron & Steel Co.Ltd.Shanghai 201999China Shanghai Engineering Research Center of Strip Casting and Rolling Shanghai 201999China Baosteel Engineering & Technology Group Co. Ltd.Shanghai 201999China

During strip casting,the thickness deviation of casting strip directly affects the quality of the hot-rolled sheet because the casting strip needs to be rolled only *** accurately control the gap between casting rolls and reduce the thickness deviation of the casting strip,a conceptual design of a prestressed twin-roll caster is proposed herein;this caster involves the setting of a constant pressure balancing cylinder between the chocks of two casting *** balancing cylinder hydraulic system adopts a three-way servo valve that controls the hydraulic *** parameters of the hydraulic power components are determined using the principle of optimal power matching,and the hydraulic system model of the balancing cylinder is thus *** dynamic analysis and simulation of the hydraulic system are performed using finite element model to obtain relevant evaluation ***,the hydraulic system is corrected using proportional-integral-derivative (PID) correction to achieve a well-controlled ***,the engineering requirements of the strip casting process can be met.

关键词： strip thickness deviation prestressed twin-roll caster balancing cylinder hydraulic system dynamic simulation

Thermo-Calc calculations and studies of the heating process of Fe_(83)Si_4B_(13) alloy

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Baosteel Technical Research 2015年第1期9卷 46-50页

作者： MA Changsong wang chengquan SUN Huande XIE Shishu Research Institute Baoshan Iron & Steel Co.Ltd.

The microstructural changes of Fe83Si4B13 amorphous mother alloy during the heating process were investigated by Laser Scanning Confocal Microscopy （LSCM） ,and the phase transformation was determined by the Thermo-Calc calculations. The differences in the melting points measured by Differential Scanning Calorimetry （DSC） and LSCM, and those obtained by Thermo-Calc calculations were also discussed. It is found that the melting points measured by DSC and LSCM are relatively similar, whereas the onset and end of the melting temperatures calculated by Thermo-Calc software are higher than those measured by DSC and observed by LSCM.

关键词： Fe-Si-B ternary alloy heating process laser scanning confocal microscope differential scanning calorimetry Thermo-Calc software

Microstructure of shot-blasting casting roll and effect on strip solidification during strip-casting process

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Baosteel Technical Research 2019年第2期13卷 32-38页

作者： wang chengquan YE Changhong ZHANG Yujun YU Yan FANG Yuan Research Institute Baoshan Iron & Steel Co.Ltd.Shanghai 201999China Shanghai Engineering Research Center of Strip Casting and Rolling Shanghai 201999China

In the strip-casting process,the surface topography of the casting roll has a significant influence on the solidification microstructure and surface quality of the as-cast strip. Shot-blasting treatment is an important way to achieve a suitable surface topography on the casting roll. In this study,a casting roll of beryllium copper alloy was shot blasted using steel pellets in the laboratory,resulting in a randomly distributed discontinuous peak and dent surface topography,in which cold deformation-slip bands and fine-deformation twins were formed. The thickness of the deformed copper alloy was about 100 μm during the shot-blasting process,and the copper hardness value increased significantly within 40 μm of the surface,with a maximum increase of more than 20% compared to the mean substrate hardness value. Within 60-100 μm of the surface,the hardness at the peak position was still higher than the copper substrate mean value,but the hardness at the dents was not,which was mainly due to the copper alloy slip and twinning deformation mechanisms. The surface hardness was similar to that of the substrate after the shot-blasted sample had been subjected to thermal shock. The molten steel first chilled and nucleated at the surface peaks of the casting roll;furthermore,fine dendrites grew and crossed over the middle of the dents. Therefore,the peak intervals of the shot-blasted surface are an important factor in solidification quality control.

关键词： shot blasting casting roll strip casting solidification

列车碰撞被动安全性与司乘人员冲击生物损伤研究进展

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爆炸与冲击 2021年第12期41卷 100-132页

作者：敬霖刘凯王成全西南交通大学牵引动力国家重点实验室四川成都610031

尽管铁路客运列车具有系列的主动安全保障措施,但列车服役中的意外碰撞事故仍不能完全避免,并且一旦发生,将造成严重的人员伤亡和巨大的经济损失。随着列车运行速度的不断提高,列车碰撞安全与冲击防护问题愈发受到关注和重视,并已开展... 详细信息

尽管铁路客运列车具有系列的主动安全保障措施,但列车服役中的意外碰撞事故仍不能完全避免,并且一旦发生,将造成严重的人员伤亡和巨大的经济损失。随着列车运行速度的不断提高,列车碰撞安全与冲击防护问题愈发受到关注和重视,并已开展了大量的探索和研究。本文中综述了列车碰撞被动安全性与司乘人员冲击生物损伤的若干研究进展。首先,统计和梳理了近些年的列车碰撞事故,分析了典型列车碰撞事故中存活人员的生物损伤分布情况;其次,介绍了列车碰撞被动安全性的研究方法,总结了列车碰撞后的响应姿态与脱轨机理;然后,从车辆耐撞性设计与评价标准、基于多级能量耗散的吸能结构设计、基于碰撞能量管理的列车结构耐撞性设计三个方面,详细阐述了列车碰撞被动安全性的研究进展;最后,关注了司乘人员在列车碰撞过程中的冲击生物损伤,总结了相关减轻司机和乘客生物损伤的防护措施。

关键词：列车碰撞被动安全碰撞能量管理耐撞性设计冲击生物损伤

AISI304不锈钢熔化过程中夹杂物在固-液糊状区漂移与聚集行为的原位观察术

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金属学报 2006年第7期42卷 708-714页

作者：梁高飞王成全方园宝钢集团有限公司技术中心前沿技术研究所

利用Confocal激光扫描显微镜原位观察了AISI304不锈钢熔化过程中夹杂物在固-液(S-L)糊状区内的漂移与聚集行为．结果显示,夹杂(SiO2-Al2O3-CaO-MgO复合氧化物)在未熔高温铁素体(δ)相间的液相通道中漂移,未熔δ相体积分数为70％时,夹杂... 详细信息

利用Confocal激光扫描显微镜原位观察了AISI304不锈钢熔化过程中夹杂物在固-液(S-L)糊状区内的漂移与聚集行为．结果显示,夹杂(SiO2-Al2O3-CaO-MgO复合氧化物)在未熔高温铁素体(δ)相间的液相通道中漂移,未熔δ相体积分数为70％时,夹杂的平均漂移速率为80μm／s;近完全熔化时,远离S-L界面的夹杂漂移速率高达1500μm／s,而 S-L界面附近的夹杂速率在50-200μm／s之间;随着熔化的进行,未熔δ相表面逐渐凹凸不平,出现“类亚晶界”．δ相对其附近漂移的夹杂表现出较强的吸附作用;夹杂多在δ-L界面处聚集、自球化; δ相吸附提供了夹杂去除的潜在途径．分析了夹杂运动的动力学机制．

关键词： AISI304不锈钢夹杂运动 Confocal激光扫描显微镜原位观察

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论行动学习在MBA教学中的实施

学位与研究生教育 2007年第11期 43-46页

作者：王成全北京理工大学管理与经济学院

在阐释行动学习内涵与意义的基础上,讨论了在MBA教学中实施行动学习的主要策略:转变观念、重塑师生角色;明确行动学习的实施步骤;组建学习小组,加强成员间的交流和互动;围绕项目专题开展活动,实施并完成项目;利用网络技术,拓展课堂教学... 详细信息

在阐释行动学习内涵与意义的基础上,讨论了在MBA教学中实施行动学习的主要策略:转变观念、重塑师生角色;明确行动学习的实施步骤;组建学习小组,加强成员间的交流和互动;围绕项目专题开展活动,实施并完成项目;利用网络技术,拓展课堂教学空间。

关键词：行动学习 MBA教学教学策略

AISI 304不锈钢加热过程中高温δ相形核与生长的原位观察

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金属学报 2006年第8期42卷 805-809页

作者：梁高飞王成全方园宝钢集团有限公司宝钢技术中心前沿技术研究所

利用共焦激光扫描显微镜原位观察AISI 304不锈钢加热过程中高温δ相的形核与生长．结果表明,1300—1400℃之间δ相在γ晶界处优先析出,而δ相在γ晶粒内“爆炸”形成需在1410℃以上；δ相形成主要受控于Ni原子的扩散；提高升温速率有利... 详细信息

利用共焦激光扫描显微镜原位观察AISI 304不锈钢加热过程中高温δ相的形核与生长．结果表明,1300—1400℃之间δ相在γ晶界处优先析出,而δ相在γ晶粒内“爆炸”形成需在1410℃以上；δ相形成主要受控于Ni原子的扩散；提高升温速率有利于δ晶粒细化,促使δ/γ平界面失稳并出现二次枝晶．δ相析出时以非小平面为主,另可见少量的小平面δ晶体；随着相变进行,小平面状δ相呈现出边缘钝化、向非小平面转变的趋势．利用平直界面稳定临界扰动理论探讨了δ相生长界面失稳的机制,并从结晶动力学对δ相生长方式转变的原因进行了分析．

关键词：不锈钢共焦激光扫描显微镜铁素体原位观察

A simple simulator and method for measuring transient interfacial heat transfer in the strip casting process

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Baosteel Technical Research 2009年第1期3卷 32-34页

作者： ZHANG Wei LIANG Gaofei wang chengquan YU Yan FANG Yuan LI Jianguo School of Materials Science ＆ Engineering Shanghai Jiaotong University Shanghai 200240 China Advanced Technology Division Baosteel Research Institute Baoshan Iron ＆ Steel Co. Ltd. Shanghai 201900 China

This study presents a simple simulator for measuring the transient interfacial heat transfer between the molten steel and the copper casting roll for strip casting. The calculation principle of the heat flux is introduced in detail. Results show that the heat flux reaches the peak value of 9 MW/m^2 ,and decreases rapidly to 4 MW/m^2, and then fluctuates within the range of 2 MW/m^2 to 5 MW/m2. It agrees with the previous study. It also indicates the simulator can be effectively used to analyze the heat transfer during strip casting.

关键词： strip casting heat transfer heat flux