| 一种车用膜式空气弹簧有效面积的预测方法 |
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| 引用本文： | 尹航,邬明宇,李雪冰,吕靖成,杜永昌,梁冠群,危银涛.一种车用膜式空气弹簧有效面积的预测方法[J].复合材料学报,2021,38(12):4371-4378. |
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| 作者姓名： | 尹航 邬明宇 李雪冰 吕靖成 杜永昌 梁冠群 危银涛 |
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| 作者单位： | 清华大学 汽车安全与节能国家重点实验室,北京 100084 |
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| 基金项目： | 国家自然科学基金(51761135124；11672148；52003142；11675283)；汽车安全与节能国家重点实验室基金；清华大学Z05专项基金 |
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| 摘 要： | 空气弹簧帘线-橡胶复合材料结构具有刚度可变、轻量化、高度可调、隔振效果好等优势，在汽车“新四化”的发展趋势下，车用空气弹簧力学成为学术和工程研究热点。但其受力的“有效面积”这一重要参数还未建立完善理论模型。结合复合材料力学特性与几何学特征，提出一种车用膜式空气弹簧有效面积理论分析与预测方法。给出了空气弹簧有效面积理论预测表达式，体现了空气弹簧气囊内压强、空气弹簧高度等因素对有效面积的综合影响。利用力学综合实验台架设计实验，对某型号空气弹簧进行有效面积测量，实验结果与理论分析的对比显示在实验测量的范围内，理论预测的有效面积误差在1%以内，表明了这种理论分析方法的合理性。这种方法对进行有效面积的预测、空气弹簧的准确建模及进一步进行高精度的车高控制具有一定的指导意义。
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| 关 键 词： | 空气弹簧 有效面积 复合材料力学 理论预测 帘线-橡胶复合材料 |
| 收稿时间： | 2020-12-25 |
A predictive method of effective area of rolling lobe air spring for vehicles |
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| Affiliation: | State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China |
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| Abstract: | Air springs with cord-rubber structure have the advantages of variable stiffness, lightweighting and better isolating effect, which have become the highlights of vehicle research in the current of new developing trends of automobile. However, as an important parameter, the effective area of air spring is lack of thorough predictive theory. A predictive analytical method for effective area of rolling lobe air spring for vehicles was put forward based on composite material mechanics and the geometrical characteristics of air spring bellow. A predictive formula of air spring effective area was given manifesting the influence of various parameters especially pressure inside bellow and air spring height on effective area. Experiments were conducted using mechanical test rig with certain air spring and the results of test fit the theory well. The errors of theoretical prediction can be less than 1% compared with experiment data. The method is useful for effective area prediction and accurate modeling as well as the height control of air suspension. |
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