【摘要】 针对混凝土坝的接触问题,建立了三维摩擦接触非线性动接触模型。根据接触面上的非线性特点,把力系分为外荷载和接触面上的接触力,通过假设接触状态,把接触力作为迭代变量,求解满足接触条件和动平衡条件的接触力。首先给出了接触面单元的应力计算公式,推导了非线性动力接触方程,详细说明求解的步骤和迭代的过程。通过例子验证该模型能够模拟混凝土坝接触面的张开、闭合和滑移,实例分析表明,采用该模型有稳定的收敛性和足够精度。更多还原

【Abstract】 Based on the theory of contact forces,3-D frictional contact non-linear dynamic contact model is put forward.On the basis of the characteristics of the contact nonlinearity,forces acting on the system are divided into two parts: external and contact forces.First the formula for the contact element is given,and nonlinear dynamic contact equation is obtained.And then,the iteration process is explained in detail.At last,the contact opening,closing and sliding are simulated by giving examples,and the convergence and precision of the model are demonstrated.更多还原