Nonlinear dynamic responses of high-speed railway vehicles under combined self-excitation and forced excitation considering the influence of unsteady aerodynamic loads
文献类型：期刊论文
| 作者 | Ceng XH(曾晓辉)1,2 ; Shi HM(史禾慕)1,2; Wu H(吴晗)1,2; Shi HM(史禾慕); Zeng XH(曾晓辉)
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| 刊名 | NONLINEAR DYNAMICS
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| 出版日期 | 2021-08-17 |
| 页码 | 36 |
| 关键词 | High-speed railway vehicle Unsteady aerodynamic loads Self-excited vibration Forced vibration Quasi-periodic motion |
| ISSN号 | 0924-090X |
| DOI | 10.1007/s11071-021-06795-4 |
| 通讯作者 | Wu, Han(wuhan@imech.ac.cn) |
| 英文摘要 | The dynamic characteristics of a railway vehicle system under unsteady aerodynamic loads are examined in this study. A dynamic analysis model of the railway vehicle considering the influences of aerodynamic loads was established. The model not only considers the forced excitation effect of unsteady aerodynamic loads but also accounts for the effect of unsteady aerodynamic loads on the change of the wheel-rail contact normal forces as well as changes of the wheelset creep coefficients and creep forces/moments. Therefore, this model also considers the influences of unsteady aerodynamic loads on the self-excited vibration characteristics of the vehicle system. The time-history curves, phase trajectory diagrams, Poincare sections, and Lyapunov exponents of the vehicle system running on a smooth straight track under unsteady aerodynamic loads were determined. The results show that when the critical speed is exceeded, the vehicle system usually performs quasi-periodic motion under unsteady aerodynamic loads, which is significantly different from the periodic motion under steady aerodynamic loads. In different cases, the amplitude and phase of motion are significantly different. The amplitude of the motions can be increased by more than 159%, and the difference of phase can be up to 173 degrees. (The phase is almost reversed.) The dynamic responses of the vehicle system under unsteady aerodynamic loads contain abundant frequency components, including the frequency of the self-excited vibration, the frequency of the forced excitation, and combinations of their integer multiples. The vibration forms corresponding to the main harmonic components under unsteady and steady aerodynamic loads were compared, and the self-excited vibration component of the vehicle system under unsteady aerodynamic loads was identified. The variations in the critical speed with various parameter combinations were computed. The variation range of the critical velocity can reach 73%. |
| 分类号 | 一类 |
| WOS关键词 | BIFURCATION-ANALYSIS ; HUNTING STABILITY ; CURVED TRACK ; PARAMETERS ; SIMULATION ; MOTION ; SYSTEM ; MODEL ; HOPF |
| 资助项目 | National Natural Science Foundation of China[11672306] ; National Natural Science Foundation of China[51805522] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22020101] ; 13th Five-year Informatization Plan of the Chinese Academy of Sciences[XXH13506] ; National Key R&D Program of China[2016YFB1200602] |
| WOS研究方向 | Engineering ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:000685793500006 |
| 资助机构 | National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; 13th Five-year Informatization Plan of the Chinese Academy of Sciences ; National Key R&D Program of China |
| 其他责任者 | Wu, Han |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/87254]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Mech, Beijing, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Ceng XH,Shi HM,Wu H,et al. Nonlinear dynamic responses of high-speed railway vehicles under combined self-excitation and forced excitation considering the influence of unsteady aerodynamic loads[J]. NONLINEAR DYNAMICS,2021:36. |
| APA | 曾晓辉,史禾慕,吴晗,Shi HM,&Zeng XH.(2021).Nonlinear dynamic responses of high-speed railway vehicles under combined self-excitation and forced excitation considering the influence of unsteady aerodynamic loads.NONLINEAR DYNAMICS,36. |
| MLA | 曾晓辉,et al."Nonlinear dynamic responses of high-speed railway vehicles under combined self-excitation and forced excitation considering the influence of unsteady aerodynamic loads".NONLINEAR DYNAMICS (2021):36. |
入库方式： OAI收割
来源：力学研究所
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