Hello, I am looking for tips and advice for the best way to set up my simulation.<\/p>\n
Background: I want to investigate the effect of far field soil liquefaction on soil-structure-interaction (SSI) results of a deeply embedded cylindrical structure under earthquake loading. Goal is to to conduct a parametric study, representing the structure by linear elastic elements, surrounded by non-liquefiable backfill soil (modelled nonlinear, red in screenshot attached), and liquefiable soil (modelled nonlinear, green in screenshot attached) in the far field. I would then change the extent and properties of the non-liquefiable soil until the impacts on the SSI results are negligible. Since I am only interested in the relative difference in results of the different scenarios, I was thinking a 2D analysis would be appropriate.<\/p>\n
At this time my two main questions \/ concerns are:<\/p>\n
1) To model soil liquefaction I want to follow the approach per paper by Richard Sturt ‘Modelling liquefaction of soils with LS-DYNA using a SANISAND-based material model’. Now per my research so far the SANISAND material model is meant for solid elements only. So is the MAT_HYSTERETIC, which I was planning on using for the non-liqueqfiable soil. Could I use these material models in a 2D analysis ? Apparently they do work for plane strain and axisymmetric shell formulations (and thick shell formulations for MAT_HYSTERETIC)…<\/p>\n
2) When solving a very simple 2D analysis in LS Dyna, I received the following warning message: “A 2D-Model is a beta feature for an Explicit LS-Dyna analysis.” All papers \/ examples I found on SSI using LS Dyna are 3D models. Now I am wondering if a 2D analysis is a good choice in general ? Or should I rather opt for a full 3D simulation ? My main driver for a 2D analysis was simplifying the modelling and saving computing resources. But if I run into issues and can’t find any documentation or resources, I have gained nothing. I want to note I am very new to Ls Dyna, and Ansys in general.<\/p>\n
I am using Ansys workbench 2024R1 (not the student version). Grateful for any advice I can get! Thank you.<\/p>\n
Joerg<\/p>\n","protected":false},"template":"","class_list":["post-368133","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["76136","178077"],"_bbp_author_ip":["184.24.96.177"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["522"],"_bbp_topic_status":["answered"],"_bbp_topic_id":["368133"],"_bbp_forum_id":["27814"],"_bbp_engagement":["76136","178077"],"_bbp_voice_count":["2"],"_bbp_last_reply_id":["368368"],"_bbp_last_active_id":["368368"],"_bbp_last_active_time":["2024-05-23 18:25:01"]},"test":"b915f170bcd94e14eaf35f6812a2eb7400e8cd4e"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/368133","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":1,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/368133\/revisions"}],"predecessor-version":[{"id":368369,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/368133\/revisions\/368369"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=368133"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}