检索结果-南通市图书馆

Numerical investigation of circle defining curve for two-dimensional problem with general boundaries using the scaled boundary finite element method

引用

Frontiers of Structural and Civil Engineering 2019年第1期13卷 92-102页

作者： Chung Nguyen VAN Department of Civil Engineering Faculty of EngineeringChulalongkorn UniversityThailand Faculty of Civil Engineering Ho Chi Minh City of Technology and EducationVietNam

The scaled boundary finite element method (SBFEM)is applied to the static analysis of two dimensional elasticity problem,boundary value problems domain with the domain completely described by a circular defining curve. The scaled boundary finite element equations is formulated within a general framework integrating the influence of the distributed body force,general boundary conditions,and bounded and unbounded domain.This paper investigates the possibility of using exact geometry to form the exact description of the circular defining curve and the standard finite element shape function to approximate the defining curve.Three linear elasticity problems are presented to verify the proposed method with the analytical solution.Numerical examples show the accuracy and efficiency of the proposed method,and the performance is found to be better than using standard linear element for the approximation defining curve on the scaled boundary method.

关键词： exact geometry circular defining curve general boundaries SBFEM

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Scaled boundary finite element method with exact defining curves for two-dimensional linear multi-field media

引用

Frontiers of Structural and Civil Engineering 2019年第1期13卷 201-214页

作者： Jaroon RUNGAMORNRAT Chung Nguyen VAN Applied Mechanics and Structures Research Unit Department of Civil EngineeringFaculty of EngineeringChulalongkorn UniversityBangkok 10330Thailand Faculty of Civil Engineering Ho Chi Minh City of Technology and EducationHo Chi Minh 721400Vietnam

This paper presents an efficient and accurate numerical technique based upon the scaled boundary finite element method for the analysis of two-dimensional,linear,second-order,boundary value problems with a domain completely described by a circular defining curve.The scaled boundary finite element formulation is established in a general framework allowing single-field and multi-field problems,bounded and unbounded bodies,distributed body source,and.general boundary conditions to be treated in a unified fashion.The conventional polar coordinates together with a properly selected scaling center are utilized to achieve the exact description of the circular defining curve,exact geometry of the domain,and exact spatial differential operators.Standard finite element shape functions are employed in the discretization of both trial and test functions in the circumferential direction and the resulting eigenproblem is solved by a selected efficient algorithm.The computational performance of the implemented procedure is then fully investigated for various scenarios to demonstrate the accuracy in comparison with standard linear elements.

关键词： multi-field problems defining curve exact geometry general boundary conditions SBFEM

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于SBFE虚粒子边界的结构入水数值模拟

引用

兵器装备工程学报 2021年第12期42卷 153-158页

作者：李上明赵梓斌中国工程物理研究院总体工程研究所四川绵阳621000

通过联合比例边界有限元法(SBFEM)和光滑粒子法(SPH),提出了一种基于SPH框架下新的无反射边界—SBFE虚粒子边界,该SBFE虚粒子边界能够准确的模拟边界波的透射过程,能够以较小计算域模拟无穷域的特征,从而显著地提高SPH算法模拟无穷域流... 详细信息

通过联合比例边界有限元法(SBFEM)和光滑粒子法(SPH),提出了一种基于SPH框架下新的无反射边界—SBFE虚粒子边界,该SBFE虚粒子边界能够准确的模拟边界波的透射过程,能够以较小计算域模拟无穷域的特征,从而显著地提高SPH算法模拟无穷域流体的计算效率。最后,将SBFE虚粒子边界应用于无穷水域的结构入水数值模拟,验证了SBFE虚粒子边界模拟无穷域流体的准确性。

关键词： SBFEM SPH SBFE虚粒子边界无反射边界结构入水

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A SEMI-ANALYTICAL SOLUTION FOR CHARACTERISTICS OF A DAMRESERVOIR SYSTEM WITH ABSORPTIVE RESERVOIR BOTTOM

引用

Journal of Hydrodynamics 2008年第6期20卷 727-734页

作者： LI Shang-ming LIANG Hong LI Ai-min School of Civil Engineering and Architecture Nanchang University Nanchang 330031 China

In this study, a semi-analytical formulation based on the Scaled Boundary Finite Element Method （SBFEM） was proposed and used to obtain the solution for the characteristics of a two-dimensional dam-reservoir system with absorptive reservoir bottom in the frequency domain. For simplicity, the dam with arbitrary upstream faces was assumed to be rigid and was subjected to a horizontal ground acceleration, while the reservoir with absorptive bottom was assumed to be semi-infinite. The reservoir was divided into two sub-domains： a near-field sub-domain and a far-field sub-domain. The near-field sub-domain with arbitrary geometry was modelled by the Finite Element Method （FEM）, while the effects of the far-field sub-domain which was assumed to be horizontal were described by a semi-analytical formation. The semi-analytical formulation involved the effect of absorptive reservoir bottom, as well as the radiation damping effect of a semi-infinite reservoir. A FEM/SBFEM coupling formulation was presented to solve dam-reservoir coupled problems. The accuracy and efficiency of the coupling formulation were demonstrated by computing some benchmark examples. Highly accurate results are produced even if the near-field sub-domain is very small.

关键词： dam-reservoir interaction absorptive bottom SBFEM Hydraulic pressure FEM/SBFEM coupling formulation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

无穷水域中结构入水数值模拟

无穷水域中结构入水数值模拟

引用

第十八届全国非线性振动暨第十五届全国非线性动力学和运动...

作者：赵梓斌中国工程物理研究院总体工程研究所

模拟结构入水的数值方法有很多,近些年来,因为光滑粒子法(SPH)能够准确的模拟结构入水问题中自由液面破碎,翻转等情况,所以SPH方法得到迅速发展,逐步成为一种模拟结构入水的常用方法。对于有限域内的结构入水数值模拟,SPH方法的技术已... 详细信息

模拟结构入水的数值方法有很多,近些年来,因为光滑粒子法(SPH)能够准确的模拟结构入水问题中自由液面破碎,翻转等情况,所以SPH方法得到迅速发展,逐步成为一种模拟结构入水的常用方法。对于有限域内的结构入水数值模拟,SPH方法的技术已经很成熟。但是,对于工程中的绝大部分问题而言,流体域都是无限域,这样SPH方法的模拟效率就特别低。为了解决这个问题,一种简单可行的无反射边界就变得特别迫切。目前基于SPH框架下的无反射边界的种类还较少,而且大部分无反射边界的计算效率都偏低。所以我们联合比例边界有限元法(SBFEM),提出了基于SPH框架下的无反射边界--SBFE虚粒子边界。该无反射边界能够准确的模拟压力波在边界的透射过程,从而实现以较小的流体域模拟无穷域结构入水的问题。最后,我们通过数值实验表明,该SBFE虚粒子边界能够有效地阻止边界的反射波的产生,从而提高无穷域中结构入水的模拟效率及准确性。

关键词： SBFEM SPH SBFE虚粒子边界无反射边界结构入水

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：