Одномерные разностные схемы для реализации метода расщепления осесимметричных уравнений динамики упругой среды
Авторы
-
В.М. Садовский
-
О.В. Садовская
-
Е.А. Ефимов
Ключевые слова:
упругая среда
прямая задача сейсмики
цилиндрические волны
разностная схема
метод расщепления
монотонность
диссипативность
параллельная реализация
Аннотация
Строятся экономичные разностные схемы сквозного счета для решения прямых задач сейсмики в осесимметричной постановке. При распараллеливании алгоритмов, реализующих схемы на многопроцессорных вычислительных системах, применяется метод двуциклического расщепления по пространственным переменным. Одномерные системы уравнений на этапах расщепления решаются на основе явных сеточно-характеристических схем и неявной разностной схемы типа "предиктор-корректор" с контролируемой искусственной диссипацией энергии. Верификация алгоритмов и программ выполнена на точных решениях одномерных задач типа бегущих монохроматических волн. Сравнение результатов показало неоспоримые преимущества схемы с контролируемой диссипацией энергии по точности расчета гладких решений и целесообразность применения явных монотонных схем при расчете разрывов.
Раздел
Параллельные программные средства и технологии
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