论文部分内容阅读
针对建筑结构倒塌过程的梁壳单元几何、材料、接触三重非线性且连续介质向非连续介质转化的动力计算问题,提出了能够考虑多重非线性用于连续介质与非连续介质共同作用且动态转化计算的质点元方法。该方法以质点运动学为基础,建模过程与有限元一致,通过定义广义连接模型、构造连接模型转化法则和建立接触碰撞算法,将显式有限元与离散元统一于相同的计算框架之下,具备有限元连续介质阶段的计算精度和离散元非连续介质阶段的计算能力,能够用于建筑结构倒塌等强非线性的动力计算。
Aiming at the dynamic calculation problem of the geometric, material and contact triple quadrupole beams in the collapse process of building structure and the transformation from continuous medium to discontinuous medium, a new method that can consider multiple nonlinearities for dynamic interaction between continuous medium and non-continuous medium Calculated particle method. The method is based on particle kinematics. The modeling process is consistent with the finite element method. By defining the generalized connection model, constructing the transformation rule of the connected model and establishing the contact-collision algorithm, the explicit finite element and the discrete element are unified under the same computing framework , Which has the computational accuracy of the finite element continuum phase and the computational ability of the discrete element discontinuous medium stage and can be used for the dynamic calculation of strong non-linearity such as the collapse of building structures.