轴对称冲击有限元一致质量矩阵迭代解

给出高速冲击动力有限元一致质量矩阵解的迭代过程，即把集总质量矩阵解作为初值进行有限次迭代得到满足工程需要的一致质量矩阵近似解．实际算例说明，一致质量近似解较集总质量解改善了对应力波传播过程的分析，而且在高速冲击计算中能给出与实验接近的计算结果．

ITERATIVE METHOD USING CONSISTENT MASS MATRIX IN AXISYMMETRICAL FINITE ELEMENTS FOR ANALYSIS OF HYPERVELOCITY IMPACT 1)

We present in this paper the iterative method using consistent mass matrix in axisymmetrical finite elements for analysis of hypervelocity impact. To retain the advantage of the integration on an element by element basis which is at the heart of the modern hydrocodes, we suggest the iterative process where the first step is to solve for accelerations at an advanced time step by using the lumped mass approach, then iterate using a consistent mass matrix to improve the estemate. Examples are given to show improved resolution with the new method.