Dynamics of planar rocking-blocks with Coulomb friction and unilateral constraints: comparisons between experimental and numerical data
Dynamics of planar rocking-blocks with Coulomb friction and unilateral constraints: comparisons between experimental and numerical data
复制标题
具有库仑摩擦和单边约束的平面摇块动力学：实验数据与数值数据的比较
DOI：
10.1007/s11044-013-9356-9
复制
发表时间：
2014
影响因子：
3.4
通讯作者：
Liu Caishan
中科院分区：
文献类型：
--
作者：
Zhang Hongjian;Brogliato Bernard;Liu Caishan
本文研究平面岩体的动力学问题，它是受两个单边约束和摩擦作用的力学系统。通过数值模拟和其他作者在其他地方获得的实验数据的比较，验证了最近引入的包含库仑摩擦的多重碰撞定律。它们涉及无基础激励的自由摇摆运动，以及用于研究摇摆开始和倾覆现象的各种基础激励运动。对自由摇摆和开始摇摆的比较表明，所提出的冲击模型可以正确地预测块体的运动。特别是自由摇摆试验可以用来拟合冲击规律参数（恢复和摩擦系数，块宽度）。然后将自由摇摆拟合参数用于激振基础情况。
This paper concerns the dynamics of planar rocking blocks, which are mechanical systems subject to two unilateral constraints with friction. A recently introduced multiple impact law that incorporates Coulomb friction is validated through comparisons between numerical simulations and experimental data obtained elsewhere by other authors. They concern the free-rocking motion with no base excitation, and motions with various base excitations for the study of the onset of rocking and of the overturning phenomenon. The comparisons made for free-rocking and for the onset of rocking demonstrate that the proposed impact model allows one to correctly predict the block motions. Especially the free-rocking experiments can be used to fit the impact law parameters (restitution and friction coefficients, block width). The free-rocking fitted parameters are then used in the excited-base cases.