摘要
本文利用位移型Gurtin变分原理,在时间域上采用三次Hermite插值函数进行离散,给出了一种计算结构动力响应的逐步积分方法。通过稳定性分析研究了该方法的稳定区情况表明,当1.64≤θ≤2.08时,该方法的数值计算精度很高,但是条件稳定积分格式。当θ≥4.1时,该方法是无条件稳定的积分格式,精度较高。
A step by step integration method based on Gurtin variational principle of displacement model is presented. The interpolation functions of cubic Hermite are introduced to approximate the nodal displacement in time domain. When 1 64≤ θ ≤2 08, the method has a high accuracy; but it is a conditional stable formula. When θ≥ 4 1, the method is an unconditional stable formula and has a satisfying accuracy.
出处
《计算力学学报》
CAS
CSCD
1999年第2期151-156,共6页
Chinese Journal of Computational Mechanics
基金
国家自然科学基金