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摘要:本文在利用五点中心差分法求波动方程的数值解,与经典的三点中心差分法相比较,提高了数值解的精度,精度由位置变量的二阶提高到四阶,时间变量的精度保持不变.该算法格式清晰,易迭代,易推广以提高波动方程求解的精度.
关键词:波动方程;五点中心差分法;数值精度
ABSTRACT:Based on 3-point centre difference scheme, the paper provided a algorithm to the wave equation which adopt 5-point centre difference scheme for increasing the computing Accuracy. The accuracy of position promote from o(h2) to o(h4). The time accuracy is not invariable. The algorithm is clear、easy understand.
Keywords:wave equation; five center finite difference; numerical precision
采用泰勒展开的方法构造五点中心差分法算法格式并得出初始条件的离散,目的在于提高波动方程的数值解精度,精度由位置变量的二阶提高到四阶,时间变量的精度保持不变.该算法具有格式简单、计算速度快等优点,是有一种有效且有广泛应用前景的方法.