Search | Engineering

订阅投稿

首页工程期刊工程焦点工程成就工程前沿关于我们 English

资源类型

期刊论文 202

会议视频 15

年份

2023 8

2022 9

2021 22

2020 9

2019 3

2018 10

2017 10

2016 20

2015 12

2014 7

2013 6

2012 10

2011 11

2010 4

2009 17

2008 11

2007 11

2006 5

2005 2

2004 3

展开︾

关键词

高速铁路 14

运载系统 6

创新 4

京沪高速铁路 3

发展 3

中国高速铁路 2

交通 2

动车组 2

工程实践 2

工程成就 2

技术体系 2

桥梁工程 2

磁悬浮列车 2

铁路运输 2

高速列车 2

2 Mb/s高速信令 1

BP算法 1

FE-SEA混合法 1

HY-2 1

展开︾

检索范围：

排序：展示方式：

WEIS wheel speed real-time measuring method for VOSM

Mengyao PAN, Guixiong LIU, Xiaobin HONG, Tusheng LIN,

《机械工程前沿（英文）》 2010年第5卷第3期页码 322-327 doi: 10.1007/s11465-010-0022-0

摘要： Wheel speed is one of the key parameters of vehicle operating attitude. To solve the problems in traditional wheel speed measuring methods, such as low measurement precision and the lack of real-time monitoring of the vehicle’s operating attitude, a wheel embedded intelligent sensors (WEIS) wheel speed measuring method for vehicle operating safety states monitoring (VOSM) is innovatively proposed. Radial acceleration signal is obtained through a WEIS module embedded in the hub. Using wavelet packet to implement wavelet de-noising for the non-stationary acceleration signals, and adopting short-time Fourier transform (STFT) algorithm to extract the signal characteristics, the wheel speed measurement can be achieved. The experimental result shows that under experimental conditions the speed measurement error is −2.05%, and the speed measuring response time is 0.45 s.

关键词： wheel embedded intelligent sensing wheel speed monitoring

HTML PDF 收藏

轮轨技术是京沪高速铁路的必然选择——兼论日、德磁浮系统的现状

金履忠

《中国工程科学》 2000年第2卷第7期页码 22-27

摘要：

自1994年以来，多次专家论证均认为，建轮轨式京沪高速铁路是可行的。1999年有三位院士提出，中国不宜发展轮轨列车，而应大力发展磁悬浮列车。文章介绍了三位院士的基本观点。为什么世界上已有近10个国家和地区已建、在建或计划近期建设轮轨式高速铁路运营线，却至今还没有建设一条磁悬浮的运营线？特别是为什么连有长期试验研究经验的日本、德国国内，对发展磁悬浮系统还有不小的争议呢？笔者以为，要害在于磁浮系统的经济效益太差，技术也不完全成熟，这才是决定的因素；磁浮系统除速度比轮轨式较高之外，无论技术上、经济上，与民航及轮轨式高速铁路相比，几乎没有任何优越之处，因此称之为"技术跨越"难以成立。建议：把磁浮系统应用于高速铁路，只宜做跟踪性、可行性研究，不宜花若干亿去建试验线，关键是要尽快批准轮轨式京沪高速铁路立项上马。

关键词：高速铁路技术经济比较轮轨铁路磁浮技术

HTML PDF 收藏

京沪高速铁路建设

沈志云,钱清泉

《中国工程科学》 2000年第2卷第7期页码 28-33

摘要：

文章针对京沪高速铁路建设问题，系统阐述了磁浮列车技术及高速轮轨技术，比较了两种方案的优缺点，提出了笔者自己的一些观点，希望对京沪高速铁路建设提供一些参考。

关键词：京沪高速铁路磁浮技术高速轮轨技术

HTML PDF 收藏

高速列车转向架技术研究

赵明花,梁树林,宋春元

《中国工程科学》 2015年第17卷第4期页码 53-62

摘要：

高速铁路运营对转向架技术提出了更高要求，为能设计出性能更优越的动车组转向架，调查了中国高速动车组的线路条件、动车组的车轮踏面磨耗情况，分析轮轨匹配关系；动力学分析中考虑了转臂节点、抗蛇行减振器、空气弹簧等部件的非线性特性，橡胶、减振器等减振元件高低温变化条件下车辆参数的变化，电机弹性悬挂方式等，在实际轮轨匹配关系基础上建立了车辆系统动力学模型。动力学系统仿真选择了最优悬挂参数，结合部件台架测试对悬挂元件进行了工程化设计；为掌握转向架服役周期内关键部件可靠性，对运用动车组转向架进行了大量的动应力测试，系统分析了中国无砟轨道条件下转向架主要承载区域载荷随车辆运营周期、不同气候条件、不同线路条件下的变化趋势，建立了中国高速列车载荷谱体系。通过结构、悬挂、传动、制动、焊接、降噪、轮轨等系统集成，形成高速列车转向架技术体系。

关键词：高速列车；轮轨关系；系统动力学；载荷谱；结构优化

HTML PDF 收藏

高速铁路联调联试关键技术和试验研究主要成果

康熊,姚建伟

《中国工程科学》 2015年第17卷第4期页码 21-29

摘要：

阐释了高速铁路联调联试的内涵和必要性，结合我国高速铁路联调联试的工程实践，从轮轨关系、弓网关系、列车空气动力学、车-线-桥耦合等角度，对高速铁路联调联试关键技术进行了分析，对高速铁路联调联试和试验研究取得的主要成果进行了系统性提炼和归纳，给出可供高速铁路建设和运用参考的相关思考和建议。

关键词：高速铁路；系统试验；联调联试；轮轨关系；弓网关系；车-线-桥；列车空气动力学

HTML PDF 收藏

Simulation and analysis of grinding wheel based on Gaussian mixture model

Yulun CHI, Haolin LI

《机械工程前沿（英文）》 2012年第7卷第4期页码 427-432 doi: 10.1007/s11465-012-0350-3

摘要：

This article presents an application of numerical simulation technique for the generation and analysis of the grinding wheel surface topographies. The ZETA 20 imaging and metrology microscope is employed to measure the surface topographies. The Gaussian mixture model (GMM) is used to transform the measured non-Gaussian field to Gaussian fields, and the simulated topographies are generated. Some numerical examples are used to illustrate the viability of the method. It shows that the simulated grinding wheel topographies are similar with the measured and can be effective used to study the abrasive grains and grinding mechanism.

关键词： grinding wheel 3D topographies measurement Gaussian mixture model simulation

HTML PDF 收藏

Fatigue and impact analysis and multi-objective optimization design of Mg/Al assembled wheel considering

《机械工程前沿（英文）》 2022年第17卷第3期 doi: 10.1007/s11465-022-0701-7

摘要： The multi-material assembled light alloy wheel presents an effective lightweight solution for new energy vehicles, but its riveting connection remains a problem. To address this problem, this paper proposed the explicit riveting-implicit springback-implicit fatigue/explicit impact sequence coupling simulation analysis method, analyzed the fatigue and impact performance of the punching riveting connected magnesium/aluminum alloy (Mg/Al) assembled wheel, and constructed some major evaluation indicators. The accuracy of the proposed simulation method was verified by conducting physical experiments of single and cross lap joints. The punching riveting process parameters of the assembled wheel joints were defined as design variables, and the fatigue and impact performance of the assembled wheel was defined as the optimization objective. The connection-performance integration multi-objective optimization design of the assembled wheel considering riveting residual stress was designed via Taguchi experiment, grey relational analysis, analytic hierarchy process, principal component analysis, and entropy weighting methods. The optimization results of the three weighting methods were compared, and the optimal combination of design variables was determined. The fatigue and impact performance of the Mg/Al assembled wheel were effectively improved after optimization.

关键词： magnesium/aluminum assembled wheel riveting residual stress fatigue analysis impact analysis multi-objective optimization

HTML PDF 收藏

Lightening structure optimization on turbine wheel of vehicular turbocharger

ZHAO Junsheng, MA Chaochen, HU Liaoping

《能源前沿（英文）》 2008年第2卷第4期页码 422-426 doi: 10.1007/s11708-008-0098-y

摘要： Based on basic principle of optimization design, structure optimization of turbine is conducted using optimization module of ANSYS and APDL in order to get the minimum turbine weight. Meanwhile, the original blade profile and flow passage are maintained, and the structural strength of the turbine are guaranteed. Considering assembly technique and cast requirement, the structure of the modified turbine is determined which can save 6.91 percent of the material compared with the original one. The modified turbine not only saved material, but also gained better effect of mass distribution between the turbine and the compressor impeller. The result can provide useful reference to engineering application of turbocharger.

关键词： requirement technique engineering application turbocharger reference

HTML PDF 收藏

Numerical simulation and experimental research on the wheel brush sampling process of an asteroid sampler

《机械工程前沿（英文）》 2023年第18卷第2期 doi: 10.1007/s11465-022-0732-0

摘要： To examine the environmental characteristics of the microgravity force and the weathered layer on an asteroid surface, a symmetric wheel brush asteroid sampler is proposed for the collection of particles on the asteroid surface. To study the influence of the wheel brush rotation speed on the sampling efficiency and the driving torque required for the wheel brush, the contact dynamics model between particles and sampling wheel brushes is established and a simulation and experimental verification of the sampling process are conducted. The parameter calibration of the sampled particles is studied first, and the calibrated particle parameters are used in the numerical simulation of the sampling process. The sampling results and the particle stream curves are obtained for the working conditions of different rotation speeds, and the effects of different parameter settings on the sampling efficiency are analyzed. In addition, a set of rotating symmetrical sampling wheel brush devices is built for the ground test, and the dynamic torque sensor is used to test the torque change of the wheel brush during the sampling process. The relationship between the speed of the wheel brush and the driving torque of the wheel brush motor is determined by comparing the simulation results with the test results. Results indicate that when the rotating speed of the wheel brush is faster, the sampling efficiency is higher, and the driving torque required for the sampling wheel brush is greater. Moreover, a numerical simulation analysis of the sampling process of the wheel brush sampler in a microgravity environment is conducted to determine the optimal speed condition, and the brushing test of the wheel brush sampler in the microgravity environment is verified with the drop tower method. This research proposes the structural optimization design and motor selection of a wheel brush asteroid sampler, which provides important reference value and engineering significance.

关键词： asteroid sampling wheel brush sampler discrete element method parameter calibration experimental research

HTML PDF 收藏

泰州大桥钢桥面铺装轮载谱研究

李洪涛,潘友强,张志祥

《中国工程科学》 2012年第14卷第5期页码 85-89

摘要：

调研了江苏省内三座跨江大桥2007—2010年的交通量和交通荷载状况，利用轮载谱分析货车交通量和交通荷载状况，并推荐了江苏省内货车轮载和典型轮载比例；分析江苏省内三座跨江大桥的货车超载情况并给出了超载比例较大的车型。研究成果为泰州大桥钢桥面铺装设计研究提供了有力支持。

关键词：跨江大桥轮载谱轮载类型交通量交通荷载

HTML PDF 收藏

Multidisciplinary co-design optimization of structural and control parameters for bucket wheel reclaimer

Yongliang YUAN, Liye LV, Shuo WANG, Xueguan SONG

《机械工程前沿（英文）》 2020年第15卷第3期页码 406-416 doi: 10.1007/s11465-019-0578-2

摘要： Bucket wheel reclaimer (BWR) is an extremely complex engineering machine that involves multiple disciplines, such as structure, dynamics, and electromechanics. The conventional design strategy, namely, sequential strategy, is structural design followed by control optimization. However, the global optimal solution is difficult to achieve because of the discoordination of structural and control parameters. The co-design strategy is explored to address the aforementioned problem by combining the structural and control system design based on simultaneous dynamic optimization approach. The radial basis function model is applied for the planning of the rotation speed considering the relationships of subsystems to minimize the energy consumption per volume. Co-design strategy is implemented to resolve the optimization problem, and numerical results are compared with those of sequential strategy. The dynamic response of the BWR is also analyzed with different optimization strategies to evaluate the advantages of the strategies. Results indicate that co-design strategy not only can reduce the energy consumption of the BWR but also can achieve a smaller vibration amplitude than the sequential strategy.

关键词： bucket wheel reclaimer co-design energy-minimum optimization sequential strategy

HTML PDF 收藏

Heat transfer coefficient of wheel rim of large capacity steam turbines

SHI Jinyuan, DENG Zhicheng, YANG Yu, JUN Ganwen

《能源前沿（英文）》 2008年第2卷第1期页码 20-24 doi: 10.1007/s11708-008-0015-4

摘要： A way of calculating the overall equivalent heat transfer coefficient of wheel rims of large capacity steam turbines is presented. The method and formula to calculate the mean forced convection heat-transfer coefficient of the surface of the blade and for the bottom wall of the blade passage, are introduced. The heat transmission from the blade to the rim was simplified by analogy to heat transmission in the fins. A fin heat transfer model was then used to calculate the equivalent heat transfer coefficient of the blade passage. The overall equivalent heat transfer coefficient of the wheel rim was then calculated using a cylindrical surface model. A practical calculation example was presented. The proposed method helps determine the heat transfer boundary conditions in finite element analyses of temperature and thermal stress fields of steam turbine rotors.

关键词： convection heat-transfer capacity heat-transfer coefficient bottom transmission

HTML PDF 收藏

Wheel tracking methods to evaluate moisture sensitivity of hot-mix asphalt mixtures

Jie HAN,Harihar Shiwakoti

《结构与土木工程前沿（英文）》 2016年第10卷第1期页码 30-43 doi: 10.1007/s11709-016-0318-1

摘要： Existing test methods to determine moisture sensitivity in hot-mix asphalt (HMA) mixtures are time consuming and inconsistent. This research focused on wheel tracking devices to evaluate moisture sensitivity. The Asphalt Pavement Analyzer (APA) and the Hamburg Wheel Tracking Device (HWTD) were used for this research. Compacted cylindrical samples were fabricated using a Superpave Gyratory compactor. This study selected two most commonly used mixtures, SM-12.5A with PG 64-22 binder in overlay projects and SM-19A mixtures with PG 64-22 binder for major modification projects at Kansas Department of Transportation. Test results show that APA tests could induce stripping in most samples without any anti-stripping agent, which could be identified visually. However, APA results did not indicate any stripping inflection point while the HWTD results showed stripping inflection points, which are important to identify stripping potential of mixtures. The APA results show that wet tests are severe at lower temperatures. The HWTD results show improvement in the performance using anti-stripping agents at later stage. The HWTD test is more effective as a rapid test method in case of determining moisture sensitivity. Laboratory results from this study should be verified and correlated with field performance.

关键词： hot-mix asphalt moisture sensitivity rutting wheel tracking test

HTML PDF 收藏

Comparative assessment of force, temperature, and wheel wear in sustainable grinding aerospace alloy

《机械工程前沿（英文）》 2023年第18卷第1期 doi: 10.1007/s11465-022-0719-x

摘要： The substitution of biolubricant for mineral cutting fluids in aerospace material grinding is an inevitable development direction, under the requirements of the worldwide carbon emission strategy. However, serious tool wear and workpiece damage in difficult-to-machine material grinding challenges the availability of using biolubricants via minimum quantity lubrication. The primary cause for this condition is the unknown and complex influencing mechanisms of the biolubricant physicochemical properties on grindability. In this review, a comparative assessment of grindability is performed using titanium alloy, nickel-based alloy, and high-strength steel. Firstly, this work considers the physicochemical properties as the main factors, and the antifriction and heat dissipation behaviours of biolubricant in a high temperature and pressure interface are comprehensively analysed. Secondly, the comparative assessment of force, temperature, wheel wear and workpiece surface for titanium alloy, nickel-based alloy, and high-strength steel confirms that biolubricant is a potential replacement of traditional cutting fluids because of its improved lubrication and cooling performance. High-viscosity biolubricant and nano-enhancers with high thermal conductivity are recommended for titanium alloy to solve the burn puzzle of the workpiece. Biolubricant with high viscosity and high fatty acid saturation characteristics should be used to overcome the bottleneck of wheel wear and nickel-based alloy surface burn. The nano-enhancers with high hardness and spherical characteristics are better choices. Furthermore, a different option is available for high-strength steel grinding, which needs low-viscosity biolubricant to address the debris breaking difficulty and wheel clogging. Finally, the current challenges and potential methods are proposed to promote the application of biolubricant.

关键词： grinding aerospace difficult-to-machine material biolubricant physicochemical property grindability

HTML PDF 收藏

基于μ综合鲁棒控制的四轮转向车辆操纵稳定性研究

殷国栋,陈南,李普

《中国工程科学》 2005年第7卷第4期页码 54-58

摘要：

车辆总是承担不同的载荷，车辆建模亦存在着误差，传统四轮转向控制器难以达到原有的性能指标；针对外界干扰，采用μ综合鲁棒控制方法，构造横摆角速度跟踪综合控制系统设计框架，选取了不同环节的权函数。仿真结果表明，四轮转向车辆控制系统具有良好的动态性能、鲁棒稳定性和鲁棒性能，有效地提高了车辆操纵稳定性和安全性。

关键词：四轮转向鲁棒控制操纵稳定性 μ综合