结构拟动力实验数值积分方法的比较研究

在对结构拟动力实验显式数值积分方法的理论推导的基础上，通过数值计算分别对中央差分法、显式Newmark法、双卢参数法的稳定性和计算精度进行了比较研究。计算结果表明：中央差分法和显式Newmark法稳定条件为／2〈2，双口参数法是无条件稳定的；当力〈0．8，3种方法都具有良好的计算精度。

Comparative Study on the Numerical Integration Algorithms for Structural Pseudo-dynamic Test

Based on the theoretical derivation of the explicit numerical integration algorithms in the structural pseudo - dynamic test, we carry on studies on comparing the stability and the calculating accuracy of the center different algorithm, the explicit Newmark algo- rithm and the double fl parameters algorithm by the numerical calculating. As the results show, the center different algorithm and the explicit Newmark algorithm meet the condition of stability that Ω is less than 2, while the double β parameters algorithm is unconditional stable. When .Ω is less than 0. 8, these algorithms have the same good calculating precision.