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浙江大学学报（英文版）（A辑：应用物理和工程）
浙江大学学报（英文版）（A辑：应用物理和工程）

杨卫

月刊

1673-565X

jzus_zzy@zju.edu.cn

0571-87952783；87952331

310027

杭州浙大路38号浙大学报英文版编辑部

浙江大学学报（英文版）（A辑：应用物理和工程）/Journal Journal of Zhejiang University Science A：Applied Physics & EngineeringCSCDCSTPCD北大核心EISCI
查看更多>>JZUS-A:《浙大学报(英文版)(A辑：应用物理和工程)》Journal of Zhejiang University SCIENCE A focuses on Applied Physics & Mathematics, Civil Engineering, Environmental, Energy, Materials, Chemical Engineering, Mechanical, EEE, Computer & Information Sciences. JZUS-A has been indexed & abstracted by Science Citation Index-Expanded (SCI-E), Ei Compendex, CA, SA, AJ, ZM, CSA (AHTD/ AI/ AP/ ASF/ CDCD/ CE/ CI/ CIS/ Corr/ C-WC/ EC/ EMA/ MBF/ ESPM/ MD/ MG/ OA/ OT/ SS/ WR). JZUS-A welcomes the high-quality research articles, reviews, science letters, report, news & views etc from all over the world, and also welcomes your online submission at or by to get more information about JZUS-A, thanks.
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    Effect of streamlined nose length on aerodynamic performance of high-speed train with a speed of 400 km/h

    Nianxun LITian LIZhiyuan DAIDeng QIN...
    525-540页
    查看更多>>摘要：The streamlined nose length(SNL)plays a crucial role in determining the aerodynamic performance of high-speed trains.An appropriate SNL can not only effectively reduce the magnitude of aerodynamic drag and lift forces,but also improve the performance of the high-speed train in tunnel passing and crosswind circumstances.In this study,a numerical simulation of the aerodynamic performance of high-speed trains at a speed of 400 km/h,with varying SNLs,is conducted using the k-ω shear stress transport(SST)turbulence model.The different SNLs include 6.0,7.0,8.0,9.0,9.8,12.0,15.0,and 18.0 m.In order to validate the accuracy of the numerical simulation,its results are compared with wind tunnel test data obtained from the literature.Numerical simulation is carried out using compressible and incompressible gases to determine the effect of gas compressibility on results.The impact of SNL on the aerodynamic performance of the trains is analyzed in terms of aerodynamic forces,velocity,and pressure distributions.In comparison to the original train,the train with a 6.0 m SNL experienced a 10.8%increase in overall aerodynamic resistance.Additionally,the lift forces on the head and tail cars increased by 35.7%and 75.5%,respectively.On the other hand,the train with an 18.0 m SNL exhibited a 16.5%decrease in aerodynamic drag.Furthermore,the lift forces on the head and tail cars decreased by 21.9%and 49.7%,respectively.The aerodynamic drag force of the entire train varies linearly with the SNL,while the aerodynamic lift of the tail car follows a quadratic function in relation to the SNL.
      原文链接:
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    Large eddy simulation study of 3D wind field in a complex mountainous area under different boundary conditions

    Yan LILei YANXuhui HE
    541-556页
    查看更多>>摘要：Large eddy simulations generally are used to predict 3D wind field characteristics in complex mountainous areas.Certain simulation boundary conditions,such as the height and length of the computational domain or the characteristics of inflow turbulence,can significantly impact the quality of predictions.In this study,we examined these boundary conditions within the context of the mountainous terrain around a long-span cable-stayed bridge using a wind tunnel experiment.Various sizes of computational domains and turbulent incoming wind velocities were used in large eddy simulations.The results show that when the height of the computational domain is five times greater than the height of the terrain model,there is minimal influence from the top wall on the wind field characteristics in this complex mountainous area.Expanding the length of the wake region of the computational domain has negligible effects on the wind fields.Turbulence in the inlet boundary reduces the length of the wake region on a leeward hill with a low slope,but has less impact on the mean wind velocity of steep hills.
      原文链接:
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    Influence of the penetration of adjacent X-section cast-in-place concrete(XCC)pile on the existing XCC pile in sand

    Peng ZHOUJianhui XUChangjie XUGuangwei CAO...
    557-572页
    查看更多>>摘要：A series of small-scale 1g X-section cast-in-place concrete(XCC)pile-penetration model tests were conducted to study the effects of soil density and pile geometry on the lateral responses of an existing pile and the variations in surrounding soil stress.The results showed that the bending patterns of existing XCC piles varied with penetration depth.The lateral response of the existing pile was sensitive to the change in relative density and pile geometry.For example,the bending moment of the existing pile increased along with these parameters.The development of the radial stress σ'r/σ'v0 of the soil around an existing pile showed different trends at various depths during the penetration of the adjacent pile.Moreover,the change in radial stress during the penetration of the XCC pile did not exhibit the"h/R effect"that was observed in the free-field soil,due to the shielding effect of the existing piles.The peak value of radial stress σ'r_max/σ'v0 decreased exponentially as the radial distance r/R increased.The attenuation of σ'r_max/σ'v0 with r/R in the loose sand was faster than in the medium-dense or dense sands.The σ'r_max/σ'v0 at the same soil location increased with the cross-section geometry parameter.
      原文链接:
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    Time-synchronous-averaging-spectrum based on super-resolution analysis and application in bearing fault signal identification

    Zengle RENYuan WANGHuiyue TANGXin'an CHEN...
    573-585,中插1-中插12页
    查看更多>>摘要：Time-synchronous-averaging(TSA)is based on the idea of denoising by averaging,and it extracts the periodic components of a quasiperiodic signal and keeps the extracted waveform undistorted.This paper studies the mathematical properties of TSA,where three propositions are given to reveal the nature of TSA.This paper also proposes a TSA-spectrum based on super-resolution analysis and it decomposes a signal without using any base function.In contrast to discrete Fourier transform spectrum(DFT-spectrum),which is a spectrum in frequency domain,TSA-spectrum is a period-based spectrum,which can present more details of the cross effects between different periodic components of a quasiperiodic signal.Finally,a case study is carried out using bearing fault analysis to illustrate the performance of TSA-spectrum,where the rotation speed fluctuation of the shaft is estimated,which is about 0.12 ms difference.The extracted fault signals are presented and some insights are provided.We believe that this paper can provide new motivation for TSA-spectrum to be widely used in applications involving quasiperiodic signal processing(QSP).
      原文链接:
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    Evolution mechanism and quantitative characterization of initial micro-cracks in marble under triaxial compression

    Zhiliang WANGSongyu LIJianguo WANGAo LI...
    586-595,中插13-中插16页
    查看更多>>摘要：The initial micro-cracks affect the evolution characteristics of macroscopic deformation and failure of rock but are often ignored in theoretical calculation,numerical simulation,and mechanical experiments.In this study,we propose a quantitative analysis model to investigate the effects of initial micro-cracks on the evolution of marble deformation and failure.The relationship between the micro-crack propagation and the marble failure characteristics was comprehensively studied by combining theoretical analysis with a micro-computed tomography(micro-CT)scanning technique.We found that with the increase of confining pressure,the matrix elastic modulus of the marble first increased and then tended to be stable,while the micro-cracks increased exponentially.The sensitivity ranges of the marble sample matrix elastic modulus and micro-cracks to confining pressure were 0-30 MPa and 30-50 MPa,respectively.The porosity and Poisson's ratio decreased exponentially.The increasing proportion of internal micro-cracks led to an increase in the sample non-uniformity.The samples presented mainly shear failure under triaxial compression,and the failure angle decreased linearly with the increase of confining pressure.The convergence direction of cracks decreased gradually.This quantitative analysis model could accurately portray the relationship between the overall macroscopic deformation and the deviatoric stress of the samples at the compaction and the linear elastic stages,thus deepening the understanding of the stress-strain behavior of rocks.
      原文链接:
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    Novel soft robotic finger model driven by electrohydrodynamic(EHD)pump

    Xuehang BAIYanhong PENGDongze LIZhuochao LIU...
    596-604页
      原文链接:
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    • NSTL
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