利用移位的热力学伪谱方法求解一维双曲 Telegraph 方程的高阶数值解
High-Order Numerical Solution of Second-Order One-Dimensional Hyperbolic Telegraph Equation Using a Shifted Gegenbauer Pseudospectral Method
AI总结:
本文提出了一种高阶移位的热力学伪谱方法(SGPM)来求解带有初始条件和狄利克雷边界条件的一维双曲 Telegraph 方程。该方法将问题转化为积分形式,然后将其离散为一个良好条件的线性代数方程组。通过使用一些新的移位热力学操作矩阵来近似积分算子。我们推导了相关数值积分的误差公式,并提出了一种优化构造的积分操作矩阵的方法,以最小化相关的积分误差。我们研究了最优移位热力学积分操作矩阵的误差界和收敛性。此外,我们建立了移位热力学多项式和标准热力学多项式积分操作矩阵之间的关系。我们推导了SGPM的全局格点矩阵,并构建了一个高效的求解格点方程的计算算法。我们还研究了所开发计算算法的计算成本,并对所引入的方法进行了严格的收敛性和误差分析。进行了四个数值测试示例以验证该方法的有效性、精度和指数收敛性。SGPM是一种稳健的技术,可以扩展到解决许多应用中广泛出现的各种问题。
摘要:
我们提出了一种高阶移位的热力学伪谱方法(SGPM)来求解带有某些初始条件和狄利克雷边界条件的第二阶一维双曲 Telegraph 方程。数值方案的框架包括将问题转化为其积分形式,然后将其离散为一个良好条件的线性代数方程组。积分算子通过一些新颖的移位热力学操作矩阵进行数值近似。我们推导了相关数值积分的误差公式。我们还提出了一种方法,通过最小化相关的积分误差来优化所构造的操作矩阵。我们研究了最优移位热力学操作矩阵的误差界和收敛性。此外,我们建立了移位热力学多项式和标准热力学多项式积分操作矩阵之间的关系。我们推导了SGPM的全局格点矩阵,并构建了一个高效的求解格点方程的计算算法。我们还研究了所开发计算算法的计算成本,并对所引入的方法进行了严格的收敛性和误差分析。进行了四个数值测试示例以验证该方法的有效性、精度和指数收敛性。SGPM是一种稳健的技术,可以扩展到解决许多应用中广泛出现的各种问题。
英文摘要:
We present a high-order shifted Gegenbauer pseudospectral method (SGPM) to solve numerically the second-order one-dimensional hyperbolic telegraph equation provided with some initial and Dirichlet boundary conditions. The framework of the numerical scheme involves the recast of the problem into its integral formulation followed by its discretization into a system of well-conditioned linear algebraic equations. The integral operators are numerically approximated using some novel shifted Gegenbauer operational matrices of integration. We derive the error formula of the associated numerical quadratures. We also present a method to optimize the constructed operational matrix of integration by minimizing the associated quadrature error in some optimality sense. We study the error bounds and convergence of the optimal shifted Gegenbauer operational matrix of integration. Moreover, we construct the relation between the operational matrices of integration of the shifted Gegenbauer polynomials and standard Gegenbauer polynomials. We derive the global collocation matrix of the SGPM, and construct an efficient computational algorithm for the solution of the collocation equations. We present a study on the computational cost of the developed computational algorithm, and a rigorous convergence and error analysis of the introduced method. Four numerical test examples have been carried out in order to verify the effectiveness, the accuracy, and the exponential convergence of the method. The SGPM is a robust technique, which can be extended to solve a wide range of problems arising in numerous applications.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。