طريقة شرائحية بخمس نقاط تجميع لحل أنظمة المعادلات التفاضلية الجبرية الخطية عالية الدليل
Abstract
تم في هذا البحث تقديم طريقة عددية لحل منظومة من المعادلات التفاضلية الجبرية ذات أدلة عالية. تعتمد الطريقة على تقريب دالة الحل بكثيرة حدود شرائحية من الدرجة الثامنة واستخدام خمس نقاط تجميع لإيجاد الحل العددي في كل خطوة. تبين الدراسة أن الطريقة تكون مستقرة ومتقاربة من الرتبة الثامنة عند تطبيقها لحل منظومة من المعادلات التفاضلية الجبرية الخطية دليلها يساوي الواحد. وبشكل عام، عند تطبيق الطريقة لمنظومة من المعادلات التفاضلية الجبرية دليلها-u تكون مستقرة ومتقاربة من الرتبة 9-u.
وقد تم اختبار فعالية الطريقة المقدمة بحل أربع مسائل ذات أدلة مختلفة حيث تشير النَتائِج العددية إلى فعالية وكفاءة الطريقة الشرائحية المقدمة بالمقارنة مع بعض الطرائق الأخرى.
In this paper, we introduce a numerical method for solving systems of high-index differential algebraic equations. This method is based on approximating the exact solution by spline polynomial of degree eight with five collocation points to find the numerical solution in each step. The study shows that the method when applied to linear differential-algebraic systems with index equal one is stable and convergent of order 8, while it is stable and convergent of order 9-u for index equal u .
Numerical experiments for four test examples and comparisons with other available results are given to illustrate the applicability and efficiency of the presented method.
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