Multi-Symplectic Methods for Membrane Free Vibration Equation
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摘要: 基于Hamilton空间体系的多辛理论研究了膜自由振动问题,讨论了构造复合离散多辛格式的方法,并构造了一种典型的9×3点半隐式的多辛复合离散格式,该格式满足多辛守恒律、能量守恒律和动量守恒律.数值算例结果表明该多辛离散格式具有较好的长时间数值稳定性.
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关键词:
- 多辛 /
- 复合离散 /
- Runge-Kutta方法
Abstract: The multi-symplectic formulations of the membrane free vibration equation with periodic boundary conditions in Hamilton space were considered. The complex method was introduced and a semi-implicit twenty-seven-point scheme with certain discrete conservation lawsa multi-symplectic conservation law (CLS), an energy conservation law (ECL) as well as a momentum conservation law (MCL)is constructed to discrete the PDEs that are derived from the membrane free vibration equation. The results of the numerical experiments show that the multi-symplectic scheme has excellent long-time numerical behavior.-
Key words:
- multi-symplectic /
- complex discretization /
- Runge-Kutta method
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