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基于HB样条的平面大变形结构动力学等几何分析

本站小编 Free考研考试/2021-12-21

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基于HB样条的平面大变形结构动力学等几何分析
Isogeometric Analysis with Hierarchical B-Splines for Planar Structural Dynamics with Large Deformation
投稿时间:2019-05-14
DOI:10.15918/j.tbit1001-0645.2019.150
中文关键词:等几何分析HB样条多层贝塞尔提取方法局部细化
English Keywords:isogeometric analysishierarchical B-splinesmulti-level Bézier extractionlocal refinement
基金项目:民用航天预研项目(D020205);国家自然科学基金资助项目(11672034)
作者单位E-mail
荣吉利北京理工大学 宇航学院, 北京 100081
熊丽园北京理工大学 宇航学院, 北京 100081
刘铖北京理工大学 宇航学院, 北京 100081liucheng_bit@aliyun.com
辛鹏飞北京理工大学 宇航学院, 北京 100081
北京空间飞行器总体设计部, 北京 100094
刘志超空间物理重点实验室, 北京 100076
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中文摘要:
为实现大变形结构动力学问题中的网格自适应算法,研究了等几何分析中的层次B样条(HB样条)基函数构造以及多层贝塞尔提取方法问题,并将多层贝塞尔提取方法用于HB样条建模分析以实现形函数的统一.同时,采用超收敛修复方法(SPR)获得修复应力作为参考值,通过误差估计获取系统的能量范数误差,给出网格细化区域.最后,通过带圆孔平板静力学与平面大变形结构动力学算例,验证了基于HB样条等几何分析方法的有效性和准确性.
English Summary:
In order to develop the adaptive mesh refinement algorithm for planar structural dynamics with large deformation, the construction of hierarchical B-spline basis functions for isogeometric analysis and the multi-level Bézier extraction approach restudied. In order to maintain the uniformity of element basis functions, the multi-level Bézier extraction approach was employed to present a standard element structure for the hierarchical B-spline during analysis process. Furthermore, the super-convergence patch recovery method was applied to obtain the reference stress in the adaptive analysis. Therefore, the refinement domain determined based on the energy norm error, which calculated via the reference stress and the numerical stress during the error estimation. Finally, the effectiveness and accuracy of the isogeometric analysis based on the hierarchical B-spline are validated by a static example of an elastic plate with circular hole and a planar structural dynamic example with large deformation.
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