F-K領域統合法に基づく粘性音響平滑媒体における速度グラデント散乱波の数値シミュレーション
Tao Ou1, Guangming Chen2, Yubing Yang2
1Anhui Hengyuan Coal Electric Co., Ltd, Suzhou, 234000, China.
Scientific reports
|August 26, 2025
まとめ
この研究は,粘性-音響 (VA) モデルにおける地震グラデーション散布場を計算するための新しいF-K領域積分技術を導入しています. この方法は波の拡散を正確にシミュレートし,粘度が地震波の振幅と高周波コンポーネントを減少させることを示しています.
科学分野:
- 地理学
- 地震波の拡散
- 計算による地震学
背景:
- 粘性音響 (VA) 滑らかな速度モデルは,地震波形の逆転と移動に不可欠です.
- VAモデルの散乱フィールドを計算するための既存の方法には限界があります.
研究 の 目的:
- VA平滑速度モデルにおけるグラデント散乱場の計算のための,音響F-K領域における統合的技術を開発する.
- VAメディアにおけるグラデント散乱波の伝播法則を分析する.
- 速度グラデーションの散乱波数に対するシミュレーションアプローチを提供する.
主な方法:
- 速度の乱れを速度のグラデントに変換する 乱れ項のテイラー展開.
- グラデント散乱場の計算のためのフェーズシフトインターポレーション (PSPI) 技術.
- 波の伝播を検証するために,F-Kドメインをフターマンモデルと統合する.
- F-K領域における速度グラデーションの散乱波数に関する数値シミュレーション.
主要な成果:
- VA媒体の粘度により,地震波の振幅と高周波の成分が減少します.
- 地震グラデーション散乱波の振幅は,滑らかな速度モデルで減少する.
- 提案された粘性F-K領域方法は,VA FDとVA GBの方法と比較して,より大きなグラデント散乱波信号幅を示しています.
結論:
- 開発されたインテグラルテクニックは,VAの滑らかな速度モデルにおいて,グラデーション散乱フィールドを効果的に計算します.
- 数値シミュレーションは,VAメディアにおける地震波の拡散を分析するメソッドの有効性を検証します.
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