A novel 3D perfectly matched layer (PML) boundary condition for accelerated analysis of seismic waves in heterogeneous media based on an efficient voxel element method (VEM)

Research Project

Project/Area Number	25K08218
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Review Section	Basic Section 25030:Disaster prevention engineering-related
Research Institution	Hiroshima University
Principal Investigator	KHAJI NASER 広島大学, 先進理工系科学研究科(工), 准教授 (70846964)
Co-Investigator(Kenkyū-buntansha)	堀宗朗国立研究開発法人海洋研究開発機構, 付加価値情報創生部門, 部門長 (00219205)
Project Period (FY)	2025-04-01 – 2028-03-31
Project Status	Granted (Fiscal Year 2025)
Budget Amount *help	¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000) Fiscal Year 2027: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000) Fiscal Year 2026: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000) Fiscal Year 2025: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords	Perfectly matched layer
Outline of Research at the Start	Integrated Earthquake Simulation (IES) is a novel method for assessing earthquake hazards and disasters within a city. IES’s run-time must be as short as possible. We have already developed a 2D viscoelastic PML formulation within the context of the voxel element method, reducing the runtime to 5% of that of the classic finite element method. The present proposal aims to extend the proposed 2D simulation tool to solve 3D real-world problems, where the runtime is expected to be significantly reduced. The developed 3D numerical tool will be implemented in a digital twin platform in the future.