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Celebrating the 120th Anniversary of southwest jiaotong university

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Journal of Modern Transportation 2016年第1期24卷 F0003-F0003页

作者： southwest jiaotong university southwest jiaotong university

southwest jiaotong university （SWJTU） will celebrate its 120th anniversary on May 15, 2016.

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NONLINEAR OSCILLATIONS AND CHAOS IN A RAILWAY VEHICLE SYSTEM

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Chinese Journal of Mechanical Engineering 1998年第3期11卷 68-75页

作者： Zeng Jing National Traction Power Laboratory, southwest jiaotong university southwest jiaotong Univ Chengdu China

The study of nonlinear oscillations and chaos of a railway freight car is undertaken. The vehicle is considered as a multiple rigid body system with 9 degrees of freedom. The vehicle forward speed is taken as the control parameter of the system. Hopf bifurcation point, limit cycles, quasiperiodic and chaotic motions of the system are computed by use of numerical methods. The identification of periodic, quasiperiodic and chaotic motions of the system is carried out by using the methods of phase plane portrait and Poincare map. Numerical results show that chaotic motion appears via the route of quasiperiodicity when the vehicle runs over a certain speed.

关键词： Railway vehicle Vibration Bifurcation Chaos

NUMERICAL ANALYSIS OF NONLINEAR STABILITY FOR RAILWAY PASSENGER CARS

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Chinese Journal of Mechanical Engineering 2001年第2期14卷 97-101页

作者： Zeng Jing National Traction Power Laboratory, southwest jiaotong university 西南交通大学牵引动力国家重点实验室四川成都

The Newton Raphson iteration and QR algorithm are combined to search the Hpf bifurcation point of the vehicle running on straight track and on large radius curved tracks. Limit cycles that are bifurcated from the equilibrium points and the saddle node bifurcation point are computed through employing a variable step Runge Kutta method and the Poincaré map. Finally, numerical simulations are carried out for the stability of a high speed passenger car operating on straight and large radius curved tracks. The influences of the radius of curvature and the superelevation of the track on the stability of the vehicle system are investigated.

关键词： Railway passenger car Stability Bifurcation Limit cycle Critical speed

IMPROVED HOMOTOPY ITERATION METHOD AND APPLIED TO THE NINE-POINT PATH SYNTHESIS PROBLEM FOR FOUR-BAR LINKAGES

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Chinese Journal of Mechanical Engineering 2000年第1期13卷 10-16页

作者： Zhang Jian Chen Yong (School of Mechanical Engineering, southwest jiaotong university) 西南交通大学四川成都

A new algorithm called homotopy iteration method based on the homotopy function is studied and improved. By the improved homotopy iteration method, Polynomial systems with high Order and deficient can be solved fast and efficiently comparing to the original homotopy iteration method. Numerical examples for the ninepoint path synthesis of four-bar linkages show the advantages and efficiency of the improved homotopy iteration method.

关键词： Homotopy function Homotopy iteration method Nine-point path synthesis Four-bar linkage

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西南交通大学图书馆“十三五”发展规划

图书情报研究 2016年第4期9卷 76-81,88页

作者： southwest jiaotong university Library 西南交通大学图书馆

在找准定位并从文献资源建设、系统与技术服务、读者服务工作、信息服务及素质教育、机构和队伍建设五个方面分析图书馆现状的基础上,提出西南交通大学图书馆"十三五"发展规划的指导思想与发展目标,深入阐述其主要任务与战略举措:建立... 详细信息

在找准定位并从文献资源建设、系统与技术服务、读者服务工作、信息服务及素质教育、机构和队伍建设五个方面分析图书馆现状的基础上,提出西南交通大学图书馆"十三五"发展规划的指导思想与发展目标,深入阐述其主要任务与战略举措:建立以交通相关学科为特色的文献资源保障体系,深化"以人为本,服务创新"的读者服务体系,建设具有前瞻性的数字图书馆服务平台,打造高素质、高水平的专业人才队伍。从制度、经费、人才、技术、后勤等方面探讨"十三五"发展规划实施的保障条件。

关键词：西南交通大学图书馆规划文献资源保障体系文献资源建设读者服务工作读者服务体系技术服务素质教育

Strengths and Fracture Mechanisms of Al_2O_3 Short Fiber Reinforced Al-Mg Alloy Matrix Composite at Elevated Temperatures

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Journal of Materials Science & Technology 2002年第3期18卷 257-260页

作者： Guozheng KANGDepartment of Applied Mechanics and Engineering, southwest jiaotong university, Chengdu 610031, ChinaChuan YANG and Jixi ZHANGDepartment of Materials Engineering, southwest jiaotong university, Chengdu 610031, China [ Manuscript received Janu SW jiaotong Univ Dept Appl Mech & Engn Chengdu 610031 Peoples R China SW jiaotong Univ Dept Mat Engn Chengdu 610031 Peoples R China

Using the experimental and theoretical methods, the tensile strengths and fracture mechanisms of AI2O3 short fiber reinforced AI-Mg alloy matrix composite at elevated temperatures were researched. The interfacial microstructural characteristics and the fracture surfaces of the composite at different temperatures were observed by transmission electron microscope (TEM) and by scanning electron microscope (SEM), respectively. Then, from the results of microscopic observation, the fracture mechanisms of the composite at different temperatures are discussed. Finally, the tensile strengths of the composite at elevated temperatures were predicted by statistical integration average (SIA) method with the consideration of various fracture mechanisms. It was shown that the strengths and fracture mechanisms of the composite at elevated temperature (300℃) were significantly different from those at room temperature due to the variations of interfacial bonding states. The tensile strengths predicted by the SIA method at elevated temperatures agreed well with the experimental results.

关键词： Fracture A12O3 Al-Mg alloy Composite

MOTION TYPES AND CHAOS OF MULTI-BODY SYSTEMS VIBRATING WITH IMPACTS

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Acta Mechanica Sinica 1991年第4期7卷 369-375页

作者： Shu Zhongzhou southwest jiaotong university,Chengdu 610031,China 1. southwest jiaotong university 610031 Chengdu China

In this paper,the limit sets theory for an autonomous dynamical system is generalized to a multi-body system vibrating with *** discover that if every motion of the system is bounded,it has only four different types:periodic motion 7 t,non-periodic recurrent motion γ2,and non-Poisson stable mo- tions γ3 and γ4 approaching γ1 and γ2, respectively.γ2 is the source of *** is very interesting that cha- otic motions seem stochastic but possess the character of *** way of example,we discuss chaotic motions of a small ball bouncing vertically on a massive vibrating *** result obtained by us is different from that obtained by Holmes.

关键词： multi-body impact vibrations recurrent motion chaos

Cracking Behaviour of Al_2O_3 Short Fibre/Al-5.5Zn Composite in TEM

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Journal of Materials Science & Technology 1997年第3期13卷 235-237页

作者： Xiyan ZHANG Tianxin TAN Wenyi PENG and Qing GAO (southwest jiaotong university, Chengdu 610031, China) southwest jiaotong university Chengdu 610031 China

The micromechanical behaviour of Al2O3 short fibre reinforced Al-5.5Zn matrix composite has been in-situ studied by using TEM. The results show that in the composite the nucleation and propagation of cracks take place mainly in the matrix, as well as in the region near the fibre/matrix interface. It has been also observed that the microcracks can close during *** the fracture property can be characterized by crack open displacement (COD). The cracking characteristic may result from the large strength difference between the matrix and fibre.

关键词： Cracking Behaviour of Al2O3 Short Fibre/Al-5.5Zn Composite in TEM Al Zn

ELASTIC-PLASTIC FINITE ELEMENT ANALYSIS OF THREE-DIMENSIONAL CONTACT-IMPACT AT RAIL JOINT

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Chinese Journal of Mechanical Engineering 2003年第4期16卷 411-416页

作者： Wen ZefengJin XuesongZhang WeihuaNational Traction Power Laboratory,southwest jiaotong university,Chengdu 610031, China southwest jiaotong university National Traction Power Laboratory Chengdu 610031

Using the finite element code ANSYS/LS-DYNA, a dynamic finite element modelwith an elastic-linear-kinematic-hardening plastic material is established to analyzeelastic-plastic stresses in the railhead in the impact process of wheel and rail occurring at thegap of rail joint. The model is based on the discrete elastic support condition of the rails, whichis suitable for the actual situation of wheel/track rolling contact. In the analysis the influencesof axle load, yield stress and tangent modulus of rail material on the stresses and strains areinvestigated in detail. The distribution of stresses and strains in the jointed railhead are *** is found that the axle load, yield stress and tangent modulus of rail material greatly affect thestresses and strains in the railhead during impacting. The study provides a reliable method anduseful datum for the further research on fatigue and wear of railhead and improving the rail jointmode.

关键词： Wheel/rail Rail joint Elastic-plastic Contact-impact Finite elementmethod