CT理论与应用研究2024，Vol.33Issue(3)：289-297,9.DOI:10.15953/j.ctta.2023.177
基于半精度浮点数优化与OpenMP的地震数值模拟
Seismic Numerical Simulation Based on Half-precision Floating-point Number Optimization and OpenMP
摘要
Abstract
Studying the propagation law of seismic wavefields is the basis of seismic exploration.The finite difference method is commonly used to solve the wave equation for seismic forward modeling,which has advantages of low memory usage,fast computation speed,and easy implementation.However,in the case of three dimensions(3D),the computational and data requirements increase dramatically and traditional,serial,seismic,numerical simulations can no longer meet efficiency demands.This study proposes a 3D wave equation,seismic,numerical simulation method based on half-precision floating-point numbers and OpenMP.This method optimizes commonly-used floating-point data in seismic calculations using half-precision floating-point numbers.It also utilizes the OpenMP application interface to achieve parallel computation on multi-core central processing units by dividing the wavefield calculation region.This strategy ensures the accuracy of the computation results while effectively improving the computation efficiency of 3D seismic numerical simulations and reducing memory requirements by almost half.The effectiveness and practicality of this method are demonstrated through numerical experiments.关键词
有限差分法/半精度浮点数/OpenMP/并行计算/地震波Key words
FDTD/FP16/OpenMP/parallel computing/seismic wave分类
数理科学引用本文复制引用
刘文革,涂文茂,牟其松,陈康,周觅路..基于半精度浮点数优化与OpenMP的地震数值模拟[J].CT理论与应用研究,2024,33(3):289-297,9.基金项目
中国石油-西南石油大学创新联合体科技合作(地震自聚焦成像、多信息约束波形反演与地质解释一体化关键技术研究(2020CX010203)) （地震自聚焦成像、多信息约束波形反演与地质解释一体化关键技术研究(2020CX010203）
国家自然科学基金(羌塘盆地格架及沉积结构地球物理成像理论与识别技术研究(42241206)). （羌塘盆地格架及沉积结构地球物理成像理论与识别技术研究(42241206）
