Abstract: Wheel‍–‍rail adhesion is a complex tribological problem of wheel‍–‍rail rolling contact and is closely related to the operational safety of high-speed trains. A new design concept of high-speed trains was recently proposed with an expectation of a reduction of equivalent weight and total energy consumption by installing aerodynamic wings (aero-wings) on the roof, but it was accompanied by the disadvantage of deteriorating wheel‍–‍rail adhesion performance. In this study, a comprehensive multi-body dynamics (MBD) model of the high-speed train with predesigned aero-wings is established using the commercial software SIMPACK, in which the real aerodynamic characteristics of the train are taken into account. The available adhesion and adhesion margin are employed to evaluate the wheel‍–‍rail adhesion performance. The influences of aero-wing lift, train speed, and contact conditions on the wheel‍–‍rail adhesion level are discussed. The results show that the load transfer caused by the action of aerodynamic load and braking torque was the main reason for the inconsistent adhesion condition of four wheelsets. The influences of aero-wing lift and train speed on the wheel‍–‍rail adhesion performance are coupled; the available adhesion of both motor car and trailer is negatively correlated with aero-wing lift and train speed under all contact conditions, while the variation law of adhesion margin with train speed shows differences under different contact conditions. When the wheel–rail interface was polluted by a ‘third-body medium’ such as water and oil, the wheel–rail adhesion performance was dramatically reduced and the wheelset tended to reach adhesion saturation and slide. However, track irregularity had little effect on the adhesion performance and could be ignored to save calculation time. These results are of positive significance for reducing the wheel idling or sliding phenomenon and to ensure the safe operation of high-speed trains with aero-wings.

气动升力协同高速列车轮轨黏着性能仿真研究

[1]Arias-CuevasO, 2010. Low Adhesion in the Wheel–Rail Contact. PhD Thesis, Delft University of Technology, Delft, the Netherlands.

[2]Arias-CuevasO, LiZ, LewisR, et al., 2010. Rolling-sliding laboratory tests of friction modifiers in dry and wet wheel–rail contacts. Wear, 268(3-4):543-551.

[3]CarterFW, 1926. On the action of a locomotive driving wheel. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 112(760):151-157.

[4]CEN (European Committee for Standardization), 2013. Railway Applications–Aerodynamics Part 4: Requirements and Test Procedures for Aerodynamics on Open Track, CEN-EN 14067-4. European Committee for Standardization.

[5]ChangCY, ChenB, CaiYW, et al., 2019. An experimental study of high speed wheel–rail adhesion characteristics in wet condition on full scale roller rig. Wear, 440-441:203092.

[6]ChenH, IshidaM, NakaharaT, 2005. Analysis of adhesion under wet conditions for three-dimensional contact considering surface roughness. Wear, 258(7-8):1209-1216.

[7]ChenH, BanT, IshidaM, et al., 2008. Experimental investigation of influential factors on adhesion between wheel and rail under wet conditions. Wear, 265(9-10):1504-1511.

[8]FangXC, LinS, YangZP, et al., 2018. Adhesion control strategy based on the wheel–rail adhesion state observation for high-speed trains. Electronics, 7(5):70.

[9]GaoJY, ZhangJ, NiZS, et al., 2023. The aerodynamic characteristics of roof-wing combination of a high-speed train. Journal of Experiments in Fluid Mechanics, 37(1):29-35 (in Chinese).

[10]IwnickiS, SpiryaginM, ColeC, et al., 2020. Handbook of Railway Vehicle Dynamics. 2nd Edition. CRC Press, Boca Raton, USA, p.242-278.

[11]JingL, WangKY, ZhaiWM, 2021. Impact vibration behavior of railway vehicles: a state-of-the-art overview. Acta Mechanica Sinica, 37(8):1193-1221.

[12]JingL, LiuZ, LiuK, 2022a. A mathematically-based study of the random wheel–rail contact irregularity by wheel out-of-roundness. Vehicle System Dynamics, 60(1):335-370.

[13]JingL, SuXY, FengC, et al., 2022b. Strain-rate dependent tensile behavior of railway wheel/rail steels with equivalent fatigue damage: experiment and constitutive modeling. Engineering Fracture Mechanics, 275:108839.

[14]JingL, ZhouXF, WangKY, 2023. An elastic-plastic theoretical analysis model of wheel–rail rolling contact behaviour. Acta Mechanica Sinica, 39:422465.

[15]KalkerJJ, 1967. On the Rolling Contact of Two Elastic Bodies in the Presence of Dry Friction. PhD Thesis, Delft University of Technology, Delft, the Netherlands.

[16]KalkerJJ, 1982. A fast algorithm for the simplified theory of rolling contact. Vehicle System Dynamics, 11(1):1-13.

[17]KalkerJJ, 1991. Wheel–rail rolling contact theory. Wear, 144(1-2):243-261.

[18]LiuB, MeiTX, BruniS, 2016. Design and optimisation of wheel–rail profiles for adhesion improvement. Vehicle System Dynamics, 54(3):429-444.

[19]OhyamaT, 1991. Tribological studies on adhesion phenomena between wheel and rail at high speeds. Wear, 144(1-2):263-275.

[20]OlofssonU, 2009. Adhesion and friction modification. In: Lewis R, Olofsson U (Eds.), Wheel–Rail Interface Handbook. Woodhead Publishing, Oxford, UK, p.510-527.

[21]PolachO, 1999. A fast wheel–rail forces calculation computer code. Vehicle System Dynamics, 33(Sup1):728-739.

[22]PolachO, 2005. Creep forces in simulations of traction vehicles running on adhesion limit. Wear, 258(7-8):992-1000.

[23]ShenZY, HedrickJK, ElkinsJA, 1983. A comparison of alternative creep force models for rail vehicle dynamic analysis. Vehicle System Dynamics, 12(1-3):79-83.

[24]SpiryaginM, PolachO, ColeC, 2013. Creep force modelling for rail traction vehicles based on the Fastsim algorithm. Vehicle System Dynamics, 51(11):1765-1783.

[25]SpiryaginM, WuQ, PolachO, et al., 2022. Problems, assumptions and solutions in locomotive design, traction and operational studies. Railway Engineering Science, 30(3):265-288.

[26]TombergerC, DietmaierP, SextroW, et al., 2011. Friction in wheel–rail contact: a model comprising interfacial fluids, surface roughness and temperature. Wear, 271(1-2):2-12.

[27]VermeulenPJ, JohnsonKL, 1964. Contact of nonspherical elastic bodies transmitting tangential forces. Journal of Applied Mechanics, 31(2):338-340.

[28]VollebregtE, SixK, PolachO, 2021. Challenges and progress in the understanding and modelling of the wheel–rail creep forces. Vehicle System Dynamics, 59(7):1026-1068.

[29]VollebregtEAH, 2014. Numerical modeling of measured railway creep versus creep-force curves with CONTACT. Wear, 314(1-2):87-95.

[30]WangRD, NiZS, ZhangJ, et al., 2022. Optimization design of tandem airfoils on high-speed train. Acta Aerodynamica Sinica, 40(2):129-137 (in Chinese).

[31]WangWJ, ShenP, SongJH, et al., 2011. Experimental study on adhesion behavior of wheel/rail under dry and water conditions. Wear, 271(9-10):2699-2705.

[32]WuB, WenZF, WangHY, et al., 2014. Numerical analysis on wheel/rail adhesion under mixed contamination of oil and water with surface roughness. Wear, 314(1-2):140-147.

[33]WuB, XiaoGW, AnBY, et al., 2022. Numerical study of wheel/rail dynamic interactions for high-speed rail vehicles under low adhesion conditions during traction. Engineering Failure Analysis, 137:106266.

[34]XiaoGW, WuB, YaoLQ, et al., 2022. The traction behaviour of high-speed train under low adhesion condition. Engineering Failure Analysis, 131:105858.

[35]YanRH, GaoC, WuB, et al., 2022. Research on aerodynamic layout of lift wings on a high-speed train under boundary constraint. Acta Aerodynamica Sinica, 40(6):‍138-145 (in Chinese).

[36]YangYF, LingL, ZhangT, et al., 2021. An advanced antislip control algorithm for locomotives under complex friction conditions. Journal of Computational and Nonlinear Dynamics, 16(10):101004.

[37]YangYF, LingL, WangC, et al., 2022. Wheel/rail dynamic interaction induced by polygonal wear of locomotive wheels. Vehicle System Dynamics, 60(1):211-235.

[38]ZhangWH, ChenJZ, WuXJ, et al., 2002. Wheel/rail adhesion and analysis by using full scale roller rig. Wear, 253(1-2):82-88.

[39]ZhouXF, WangJN, JingL, 2023. Coupling effects of strain rate and fatigue damage on wheel–rail rolling contact behaviour: a dynamic finite element simulation. International Journal of Rail Transportation, 11(3):317-338.