{"title":"爆炸和边界荷载作用下弹性地基八元桁架点阵复合夹层板动力响应研究","authors":"Yuan Li , Fu Yanming , Dong Li","doi":"10.1016/j.euromechsol.2025.105836","DOIUrl":null,"url":null,"abstract":"<div><div>Based on the Von Karman nonlinear theory and high-order shear deformation theory, a theoretical model of composite sandwich panels (CSPs) was established by considering the constitutive relationship of octet-truss lattice structure into sandwich panels for the first time. The motion equations of model were derived by Galerkin method. The dynamic response of octet-truss lattice composite sandwich panels (O-CSPs) on Winkler-Pasternak foundations under blast and boundary loading was studied by numerical method for solving motion equations using the fourth-order Runge-Kutta method. The effects of different geometric parameters, elastic foundation moduli, boundary loading, damping, explosive quality and explosion distances on the dynamic response of O-CSPs were analyzed. Numerical results showed that when the side length ratio increases from 0.5 to 2, the proportion of declining in amplitude changes from 51 % to 79 %. The proportion of rising in amplitude increases from 15 % to 22 % when boundary loading increases from 0 GPa to 0.24 GPa. The amplitude of O-CSPs changes exponentially with the change of the side length and boundary loading. Pasternak foundation has a better effect of suppressing vibration than Winkler foundation. The dynamic response of the equivalent lattice model was analyzed by finite element method to prove the correctness of numerical results. The blast-proof performance of honeycomb CSPs was calculated and compared with the proposed O-CSPs model to verify the superiority of O-CSPs. The results showed that O-CSPs have lower amplitude and stress level than honeycomb CSPs. The conclusions of this paper can provide the reference for the application of O-CSPs in the field of anti-seismic and blast-proof.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"115 ","pages":"Article 105836"},"PeriodicalIF":4.2000,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Study on the dynamic response of octet-truss lattice composite sandwich panels on elastic foundations under blast and boundary loading\",\"authors\":\"Yuan Li , Fu Yanming , Dong Li\",\"doi\":\"10.1016/j.euromechsol.2025.105836\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Based on the Von Karman nonlinear theory and high-order shear deformation theory, a theoretical model of composite sandwich panels (CSPs) was established by considering the constitutive relationship of octet-truss lattice structure into sandwich panels for the first time. The motion equations of model were derived by Galerkin method. The dynamic response of octet-truss lattice composite sandwich panels (O-CSPs) on Winkler-Pasternak foundations under blast and boundary loading was studied by numerical method for solving motion equations using the fourth-order Runge-Kutta method. The effects of different geometric parameters, elastic foundation moduli, boundary loading, damping, explosive quality and explosion distances on the dynamic response of O-CSPs were analyzed. Numerical results showed that when the side length ratio increases from 0.5 to 2, the proportion of declining in amplitude changes from 51 % to 79 %. The proportion of rising in amplitude increases from 15 % to 22 % when boundary loading increases from 0 GPa to 0.24 GPa. The amplitude of O-CSPs changes exponentially with the change of the side length and boundary loading. Pasternak foundation has a better effect of suppressing vibration than Winkler foundation. The dynamic response of the equivalent lattice model was analyzed by finite element method to prove the correctness of numerical results. The blast-proof performance of honeycomb CSPs was calculated and compared with the proposed O-CSPs model to verify the superiority of O-CSPs. The results showed that O-CSPs have lower amplitude and stress level than honeycomb CSPs. The conclusions of this paper can provide the reference for the application of O-CSPs in the field of anti-seismic and blast-proof.</div></div>\",\"PeriodicalId\":50483,\"journal\":{\"name\":\"European Journal of Mechanics A-Solids\",\"volume\":\"115 \",\"pages\":\"Article 105836\"},\"PeriodicalIF\":4.2000,\"publicationDate\":\"2025-08-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"European Journal of Mechanics A-Solids\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0997753825002700\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MECHANICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"European Journal of Mechanics A-Solids","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0997753825002700","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MECHANICS","Score":null,"Total":0}
Study on the dynamic response of octet-truss lattice composite sandwich panels on elastic foundations under blast and boundary loading
Based on the Von Karman nonlinear theory and high-order shear deformation theory, a theoretical model of composite sandwich panels (CSPs) was established by considering the constitutive relationship of octet-truss lattice structure into sandwich panels for the first time. The motion equations of model were derived by Galerkin method. The dynamic response of octet-truss lattice composite sandwich panels (O-CSPs) on Winkler-Pasternak foundations under blast and boundary loading was studied by numerical method for solving motion equations using the fourth-order Runge-Kutta method. The effects of different geometric parameters, elastic foundation moduli, boundary loading, damping, explosive quality and explosion distances on the dynamic response of O-CSPs were analyzed. Numerical results showed that when the side length ratio increases from 0.5 to 2, the proportion of declining in amplitude changes from 51 % to 79 %. The proportion of rising in amplitude increases from 15 % to 22 % when boundary loading increases from 0 GPa to 0.24 GPa. The amplitude of O-CSPs changes exponentially with the change of the side length and boundary loading. Pasternak foundation has a better effect of suppressing vibration than Winkler foundation. The dynamic response of the equivalent lattice model was analyzed by finite element method to prove the correctness of numerical results. The blast-proof performance of honeycomb CSPs was calculated and compared with the proposed O-CSPs model to verify the superiority of O-CSPs. The results showed that O-CSPs have lower amplitude and stress level than honeycomb CSPs. The conclusions of this paper can provide the reference for the application of O-CSPs in the field of anti-seismic and blast-proof.
期刊介绍:
The European Journal of Mechanics endash; A/Solids continues to publish articles in English in all areas of Solid Mechanics from the physical and mathematical basis to materials engineering, technological applications and methods of modern computational mechanics, both pure and applied research.