2D microscale finite element modelling of seismic P-wave propagation in marine saturated sands to predict geotechnical parameters

IF 6.2 1区工程技术 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Computers and Geotechnics Pub Date : 2025-08-23 DOI:10.1016/j.compgeo.2025.107562

J.A. Charles , S. Gourvenec , T.J. Henstock , M.E Vardy

{"title":"2D microscale finite element modelling of seismic P-wave propagation in marine saturated sands to predict geotechnical parameters","authors":"J.A. Charles , S. Gourvenec , T.J. Henstock , M.E Vardy","doi":"10.1016/j.compgeo.2025.107562","DOIUrl":null,"url":null,"abstract":"<div><div>This paper demonstrates that microscale 2D finite element modelling can accurately predict propagation of seismic P-waves through a medium of linear-elastic grains saturated with a viscous fluid. The model outputs correspond well with Biot’s equations for elastic wave propagation at frequencies relevant to offshore geophysical surveying in saturated porous media and allow for exploration of the effects of properties of individual grains (e.g. mass, shear moduli, bulk moduli) and the properties of the granular sediment matrix geometry (e.g. porosity, grain size distribution) to be studied in relation to the seismic properties of the saturated media. In addition to validation of the model through several example granular sediment matrix geometries, initial sensitivity analyses for key grain parameters are provided. The micro finite element analysis also enables comparison of the relationships between seismic properties and geotechnical properties required for engineering design of infrastructure, which are known properties found via static tests with the same micro-scale finite element mesh.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"188 ","pages":"Article 107562"},"PeriodicalIF":6.2000,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Computers and Geotechnics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0266352X25005117","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS","Score":null,"Total":0}

引用次数: 0

Abstract

This paper demonstrates that microscale 2D finite element modelling can accurately predict propagation of seismic P-waves through a medium of linear-elastic grains saturated with a viscous fluid. The model outputs correspond well with Biot’s equations for elastic wave propagation at frequencies relevant to offshore geophysical surveying in saturated porous media and allow for exploration of the effects of properties of individual grains (e.g. mass, shear moduli, bulk moduli) and the properties of the granular sediment matrix geometry (e.g. porosity, grain size distribution) to be studied in relation to the seismic properties of the saturated media. In addition to validation of the model through several example granular sediment matrix geometries, initial sensitivity analyses for key grain parameters are provided. The micro finite element analysis also enables comparison of the relationships between seismic properties and geotechnical properties required for engineering design of infrastructure, which are known properties found via static tests with the same micro-scale finite element mesh.

查看原文本刊更多论文

海相饱和砂中地震纵波传播的二维微尺度有限元模型预测岩土参数

本文证明了微尺度二维有限元模拟可以准确地预测地震纵波在含粘性流体的线弹性颗粒介质中的传播。该模型的输出结果与Biot在饱和多孔介质中与海上地球物理测量相关的频率下的弹性波传播方程很好地对应，并允许探索单个颗粒特性（例如质量、剪切模量、体积模量）和颗粒沉积物矩阵几何特性（例如孔隙度、粒度分布）对饱和介质地震特性的影响。除了通过几个例子验证模型的颗粒沉积物基质几何形状外，还提供了关键颗粒参数的初始灵敏度分析。微有限元分析还可以比较基础设施工程设计所需的地震特性和岩土特性之间的关系，这些特性是通过使用相同的微尺度有限元网格进行静态测试发现的已知特性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Computers and Geotechnics 地学-地球科学综合

CiteScore

9.10

自引率

15.10%

发文量

438

审稿时长

45 days

期刊介绍： The use of computers is firmly established in geotechnical engineering and continues to grow rapidly in both engineering practice and academe. The development of advanced numerical techniques and constitutive modeling, in conjunction with rapid developments in computer hardware, enables problems to be tackled that were unthinkable even a few years ago. Computers and Geotechnics provides an up-to-date reference for engineers and researchers engaged in computer aided analysis and research in geotechnical engineering. The journal is intended for an expeditious dissemination of advanced computer applications across a broad range of geotechnical topics. Contributions on advances in numerical algorithms, computer implementation of new constitutive models and probabilistic methods are especially encouraged.