| 引用本文: | 李海青,赵又群.匹配机械弹性车轮的汽车稳定性分析[J].哈尔滨工业大学学报,2019,51(1):71.DOI:10.11918/j.issn.0367-6234.201802058 |
| LI Haiqing,ZHAO Youqun.Stability of vehicles with mechanical elastic wheel[J].Journal of Harbin Institute of Technology,2019,51(1):71.DOI:10.11918/j.issn.0367-6234.201802058 |
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| 摘要: |
| 为深入研究匹配机械弹性车轮（MEW）的某越野车的横摆与侧翻稳定性,利用刷子理论模型,建立MEW纵滑与侧偏理论模型；利用平板式轮胎力学特性试验台分别对MEW和普通子午线充气轮胎进行了对比试验,验证了理论模型的正确性. 以横摆角速度和预测载荷转移率（PLTR）分别作为横摆稳定性和侧翻稳定性的评价指标,并建立匹配MEW的整车非线性Carsim仿真模型,基于相平面分析方法研究MEW侧偏力学特性对汽车横摆与侧翻稳定性的具体影响规律. 结果表明:MEW与子午线充气轮胎侧偏特性曲线的变化趋势基本一致,侧向力峰值基本相同,但MEW的侧偏刚度较大,匹配MEW的整车侧翻稳定性较好,横摆稳定性较差；增大MEW的侧向力峰值的同时适当减小侧偏刚度值,可以提高匹配MEW汽车的横摆与侧翻稳定性. 研究结果可为车轮侧偏性能的改进及车轮结构优化提供相应的理论依据. |
| 关键词: 机械弹性车轮 刷子模型 横摆稳定性 侧翻稳定性 汽车 Carsim |
| DOI：10.11918/j.issn.0367-6234.201802058 |
| 分类号:U461.91 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(11672127)； 总装备部探索研究项目(NHA13002)； 中央高校基本科研业务费专项资金(NP2018403)； 江苏省研究生科研与实践创新计划(KYCX17_0240) |
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| Stability of vehicles with mechanical elastic wheel |
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LI Haiqing,ZHAO Youqun
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(College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)
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| Abstract: |
| To analyze the yaw and rollover stability of an off-road vehicle with mechanical elastic wheel (MEW), based on the brush tire model, a corrected steady-state combined longitudinal-slip and cornering brush models of MEW is set up. The flat-bed test rig of tire mechanical properties is used to conduct the steady-state longitudinal-slip and cornering characteristics experiment of the MEW and pneumatic tire, respectively, and the mechanical properties of MEW are analyzed based on the experiment results. Then, a nonlinear off-road vehicle simulation model with MEW is established to evaluate the yaw and rollover stability based on Carsim, which utilizes yaw rate and predictive load transfer ratio (PLTR) as the yaw and rollover index respectively. The cornering properties of MEW to yaw and rollover stability are analyzed based on phase-plane. Compared analysis of the cornering characteristics of pneumatic tire and MEW are done and the results show that the changed trend of cornering characteristic curve and the peak value of lateral force are almost the same, but the cornering stiffness of MEW is bigger and the vehicle with MEW has a good stability of rollover but yaw, furthermore, as peak value of lateral force increases and lateral stiffness decreases properly, the vehicle can achieve a better stability of yaw and rollover. The above simulations will be useful for the improvement and optimization of cornering performance and structure parameters of MEW. |
| Key words: mechanical elastic wheel brush tire model yaw stability rollover stability vehicle Carsim |
