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Development of combined transitional pavement structure for urban tram track-road grade crossings

Frontiers of Structural and Civil Engineering Pages 1199-1210 doi: 10.1007/s11709-023-0949-y

Abstract: using polyurethane (PU) elastic concrete and ultra-high-performance concrete (UHPC), referred to as a track-road

Keywords： urban tram track grade crossing combined track-road transitional pavement polyurethane elastic concrete

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“Fast Track” nasogastric decompression of rectal cancer surgery

Ka Li, Zongguang Zhou, Zengrong Chen, Yi Zhang, Cun Wang

Frontiers of Medicine 2011, Volume 5, Issue 3, Pages 306-309 doi: 10.1007/s11684-011-0154-6

Abstract: This study evaluates the application of fast track (FT) nasogastric decompression in patients who underwentA randomized control trial was performed comparing the group with the fast track treatment ( =β57) andThe fast track procedure might help in facilitating postoperative functional and diet recovery, reducing

Keywords： fast track nasogastric decompression rectal cancer surgery

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Deformation monitoring and assessment technology for substructure of unballasted track on railway passenger

Li Mingling

Strategic Study of CAE 2009, Volume 11, Issue 1, Pages 48-59

Abstract: style="text-align: justify;">The criterion for residual deformation of Substructure of unballasted trackprediction method and assessment criterion are put forward to determine the reasonable time of unballasted tracklaying to guarantee the quality of unballasted track.Some advice provide reference for the ongoing unballasted track on railway passenger dedicated line construction

Keywords： unballasted track deformation monitoring analysis and assessment condiction for unballasted track laying

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Electric Racers Hit the Track, but still Catching Up

Mitch Leslie

Engineering 2023, Volume 24, Issue 5, Pages 10-12 doi: 10.1016/j.eng.2023.03.003

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XB High Accuracy Rocket Sled Test Track

Yang Xingbang

Strategic Study of CAE 2000, Volume 2, Issue 10, Pages 98-104

Abstract:

Rocket sled test track is a large ground dynamic simulating test facility.The constructional key point of the track is the track´s relative linearity precision of one millionthconditions for the track.China has successfully built the world ´s only track —XB high accuracy rocket sled test trackIt indicates the linearity of the track has reached advanced world level.

Keywords： rocket sled test track ground dynamic simulating test

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Image-Aided Analysis of Ballast Particle Movement Along a High-Speed Railway Article

Xuecheng Bian, Wenqing Cai, Zheng Luo, Chuang Zhao, Yunmin Chen

Engineering 2023, Volume 27, Issue 8, Pages 161-177 doi: 10.1016/j.eng.2022.08.006

Abstract: Track vibration contributed to the movements of ballast particles, which specifically were driven byvertical acceleration near the track center and horizontal acceleration at the track edge.Furthermore, the development trends of ballast particle movements and track settlement under long-termThe track performance, including the vibration characteristics, accumulated settlement and sleeper support

Keywords： High-speed railway Full-scale model test Image-aided technique Ballast particle movement Track vibration

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Vibration characteristics and machining performance of a novel perforated ultrasonic vibration platform

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0730-2

Abstract: Ultrasonic vibration-assisted grinding (UVAG) is an advanced hybrid process for the precision machiningIts performance considerably influences the vibration amplitude and resonant frequency.In this work, a novel perforated ultrasonic vibration platform resonator was developed for UVAG.vibration characteristics.The performance of the vibration platform was evaluated by the vibration tests and UVAG experiments of

Keywords： ultrasonic vibration-assisted grinding perforated ultrasonic vibration platform vibration characteristics

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Liquid metal material genome: Initiation of a new research track towards discovery of advanced energy

Lei WANG, Jing LIU

Frontiers in Energy 2013, Volume 7, Issue 3, Pages 317-332 doi: 10.1007/s11708-013-0271-9

Abstract: As the basis of modern industry, the roles materials play are becoming increasingly vital in this day and age. With many superior physical properties over conventional fluids, the low melting point liquid metal material, especially room-temperature liquid metal, is recently found to be uniquely useful in a wide variety of emerging areas from energy, electronics to medical sciences. However, with the coming enormous utilization of such materials, serious issues also arise which urgently need to be addressed. A biggest concern to impede the large scale application of room-temperature liquid metal technologies is that there is currently a strong shortage of the materials and species available to meet the tough requirements such as cost, melting point, electrical and thermal conductivity, etc. Inspired by the Material Genome Initiative as issued in 2011 by the United States of America, a more specific and focused project initiative was proposed in this paper—the liquid metal material genome aimed to discover advanced new functional alloys with low melting point so as to fulfill various increasing needs. The basic schemes and road map for this new research program, which is expected to have a worldwide significance, were outlined. The theoretical strategies and experimental methods in the research and development of liquid metal material genome were introduced. Particularly, the calculation of phase diagram (CALPHAD) approach as a highly effective way for material design was discussed. Further, the first-principles (FP) calculation was suggested to combine with the statistical thermodynamics to calculate the thermodynamic functions so as to enrich the CALPHAD database of liquid metals. When the experimental data are too scarce to perform a regular treatment, the combination of FP calculation, cluster variation method (CVM) or molecular dynamics (MD), and CALPHAD, referred to as the mixed FP-CVM-CALPHAD method can be a promising way to solve the problem. Except for the theoretical strategies, several parallel processing experimental methods were also analyzed, which can help improve the efficiency of finding new liquid metal materials and reducing the cost. The liquid metal material genome proposal as initiated in this paper will accelerate the process of finding and utilization of new functional materials.

Keywords： liquid metal material genome energy material material discovery advanced material room-temperature liquid alloy thermodynamics phase diagram

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The discussion on the settlement of the high speed railway track led by non-engineering factor and its

You Changlong

Strategic Study of CAE 2014, Volume 16, Issue 2, Pages 106-112

Abstract:

Combined with the cases of the track settlement led by non- engineering factor，the paper analyzedthe reason and its hazard to the high speed railway track which are over the design and code standard

Keywords： high speed railway track non-engineering factor settlement led by nonengineering factor

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Recent development of vibration utilization engineering

WEN Bangchun

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 1, Pages 1-9 doi: 10.1007/s11465-008-0017-2

Abstract: The utilization of vibration and wave, which was developed during the latter half of the 20th centuryThus, due to its necessity in industry and daily life, extensive research has been devoted to vibrationIn this paper, vibration utilization is classified into linear or non-linear vibrations, waves, and electric-magneticSome research results about vibration utilization engineering are described.

Keywords： utilization engineering non-linear vibration vibration utillization utillization engineering

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PSD Analysis on Track Irregularity of Railway Linefor Passenger Transport

Chen Xiufang,Jin Shouhua,Zeng Hualiang

Strategic Study of CAE 2008, Volume 10, Issue 4, Pages 56-59

Abstract:

The track irregularity which is the main vibrating resource of the vehiclesThe statistic samples used by this paper are collected by track geometry inspection car from Qin-shenof the statistical sample space, and MATLAB soft was used to get the PSD(power spectral sensity) of trackBased on statistical average of the samples of the track irregularities, frequency smoothing of the PSDThen the track state of Qin+shen special line for passenger transport was evaluated.

Keywords： railway line for passenger transport track irregularity power spectral density stationary character

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Application of python-based Abaqus preprocess and postprocess technique in analysis of gearbox vibration

Guilian YI, Yunkang SUI, Jiazheng DU

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 2, Pages 229-234 doi: 10.1007/s11465-011-0128-z

Abstract:

To reduce vibration and noise, a damping layer and constraint layer are usually pasted on the innersurface of a gearbox thin shell, and their thicknesses are the main parameters in the vibration andThe normal acceleration of the point on the gearbox surface is the main index that can reflect the vibrationcharacteristics of the whole structure, and the vibration acceleration level is adopted to measure thedegree of the vibration and noise.

Keywords： Abaqus secondary development Python language vibration and noise reduction K-S function vibration acceleration

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Similitude design for the vibration problems of plates and shells: A review

Yunpeng ZHU, You WANG, Zhong LUO, Qingkai HAN, Deyou WANG

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 2, Pages 253-264 doi: 10.1007/s11465-017-0418-1

Abstract:

Similitude design plays a vital role in the analysis of vibration and shock problems encountered inengineering practice and summarizes the major achievements of the dynamic similitude theory in structural vibrationdiscusses the existing problems and the potential of the dynamic similitude theory for the analysis of vibration

Keywords： review dynamic similitude vibration model test

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The adaptability design method and its application for high-speed electric multiple unit on the trackk

Wang Kaiyun,Yuan Xuancheng and Zhai Wanming

Strategic Study of CAE 2015, Volume 17, Issue 4, Pages 90-97

Abstract:

Nowadays， various track structures have been applied in Chinese high-speed railway， which obviouslyIt is significant to carry out the investigation of track adaptability.Therefore， based on the theory of vehicle-track coupled dynamics， the method of adaptability design forBy regarding the high-speed EMU as the design object， a method of track adaptability design is presented

Keywords： high-speed railway； track adaptability； EMU； vehicle-track coupled dynamics

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Multi-harmonic forced vibration and resonance of simple beams to moving vehicles

Frontiers of Structural and Civil Engineering Pages 981-993 doi: 10.1007/s11709-023-0979-5

Abstract: This study modeled the moving-vehicle-induced forcing excitation on a single-span prismatic bridge as a multiple frequency-multiplication harmonic load on the modal coordinates of a linear elastic simple Euler–Bernoulli beam, and investigated the forced modal oscillation and resonance behavior of this type of dynamic system. The forced modal responses consist of multiple frequency-multiplication steady-state harmonics and one damped mono-frequency complementary harmonic. The analysis revealed that a moving load induces high-harmonic forced resonance amplification when the moving speed is low. To verify the occurrence of high-harmonic forced resonance, numerical tests were conducted on single-span simple beams based on structural modeling using the finite element method (FEM) and a moving sprung-mass oscillator vehicle model. The forced resonance amplification characteristics of the fundamental mode for beam response estimation are presented with consideration to different end restraint conditions. The results reveal that the high-harmonic forced resonance may be significant for the investigated beams subjected to vehicle loads moving at specific low speeds. For the investigated single-span simple beams, the moving vehicle carriage heaving oscillation modulates the beam modal frequency, but does not induce notable variation of the modal oscillation harmonic structure for the cases that vehicle of small mass moves in low speed.

Keywords： forced vibration linear Euler beam moving load harmonic structure frequency modulation end restraints