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学者姓名：张鹤
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Abstract ：
Asphalt mixture is a typical granular material, and its macroscopic properties are closely related to the interaction behavior of aggregate particles at the micro scales. Discrete element method (DEM), as an important numerical simulation method in granular mechanics, plays an increasingly important role in analyzing the aggregate packing characteristics, skeleton features, predicting mechanical and pavement performance of asphalt mixtures. However, the complexity of the composition of asphalt mixtures, including the particle size, shape, spatial distribution of aggregate particles, and the viscoelasticity of asphalt binders sensitive to temperature, load, and time, increases the difficulty of constructing DEM models of asphalt mixtures, selecting contact constitutive models, and determining parameters, which directly affects the accuracy and efficiency of DEM simulations. In this review, the generation methods of idealized models, image models, and user-defined models currently used to generate DEM models of asphalt mixtures were summarized in detail. Conventional contact constitutive models, including elastic and viscoelastic contact stiffness constitutive models, as well as fracture models including bonding models and cohesive softening models, were discussed. Moreover, special contact constitutive models, such as damage, self-healing, and two-stage contact models considering compaction evolution, were also summarized and discussed. Then, the contact constitutive model parameters were classified and related determination methods were summarized, and the latest application directions of DEM in current asphalt mixture research were classified. On this basis, relevant discussions were carried out, and the challenges and future development prospects faced by DEM in asphalt mixture research were proposed.
Keyword ：
Application Application Asphalt mixture Asphalt mixture Contact constitutive model Contact constitutive model Discrete element method Discrete element method Model generation method Model generation method
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| GB/T 7714 | Xue, Bin , Que, Yun , Pei, Jianzhong et al. A state-of-the-art review of discrete element method for asphalt mixtures: Model generation methods, contact constitutive models and application directions [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 414 . |
| MLA | Xue, Bin et al. "A state-of-the-art review of discrete element method for asphalt mixtures: Model generation methods, contact constitutive models and application directions" . | CONSTRUCTION AND BUILDING MATERIALS 414 (2024) . |
| APA | Xue, Bin , Que, Yun , Pei, Jianzhong , Ma, Xiaoyan , Wang, Di , Yuan, Yan et al. A state-of-the-art review of discrete element method for asphalt mixtures: Model generation methods, contact constitutive models and application directions . | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 414 . |
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Abstract ：
本发明涉及一种考虑公路曲面三维线形和不平度的车辆主动悬架调节系统，通过非完整约束车辆动力学描述车轮滚动，建立车轮滚动运动微分方程求解车轮受力，改进以往使用轮胎变形直接计算车轮受力的方法，准确求解车轮受力需求，引入车辆受迫振动外力激励，把公路三位曲面特征和车辆受迫振动联系起来，采用与车辆坐标系一致的Darboux标架，结合车辆受迫振动不平度激励在此基础上，协同车辆自然驾驶行为下的车轮操作控制研究车辆行为，直接研究车轮滚动状态和车轮操作控制之间的关系，提取当前车轮位置参数，建立纵向、横向、垂向耦合的整车模型，根据不同车轮预测受力情况及车身姿态，调整主动悬架刚度和阻尼。
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| GB/T 7714 | 张鹤 , 卓曦 . 考虑公路曲面三维线形和不平度的车辆主动悬架调节系统 : CN202111305880.X[P]. | 2021-11-05 00:00:00 . |
| MLA | 张鹤 et al. "考虑公路曲面三维线形和不平度的车辆主动悬架调节系统" : CN202111305880.X. | 2021-11-05 00:00:00 . |
| APA | 张鹤 , 卓曦 . 考虑公路曲面三维线形和不平度的车辆主动悬架调节系统 : CN202111305880.X. | 2021-11-05 00:00:00 . |
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