题目：The design-through-analysis workflow in the framework of isogeometric analysis
报告人：郭玉杰 博士(航空宇航学院航空航天交叉研究院)
时间：2017年5月24日（周三）10:10 AM
地点：明故宫校区A18-209会议室
主办单位：科协、航空宇航学院、航空航天交叉研究院
报告摘要：
Multi-patch analyses of CAD-generated models are still a fundamental challenge in isogeometric analysis including aspects of trimming, coupling, non-conformity of patches and native CAD data. The latter providing data suited for a geometric representation but being limited in terms of analysis-ready information. Typical steps of a data transformation to typical elements of numerical modeling require a number of merge and join operations of multiple data sets in combination with forward/backward mappings between the physical space and corresponding parameter spaces of spline-based geometry segments to allow a unique identification and specification of the required surface and interface data.
In this talk, we address the challenges of multi-patch modeling and present a conceptual approach for a seamless working with multi-patch models based on the STEP file format. We demonstrate the robustness and reliability of the proposed workflow in the context of modeling industry relevant shell structures. The weak coupling constraints between non-matching patches were addressed by using the non-symmetric variant of Nitsche's method. In contrast to its symmetric variant, this approach does not require stabilization terms and therefore does not depend on the appropriate estimation of stabilization parameters. We present several representative examples to demonstrate accuracy and robustness of the parameter-free patch coupling as part of our STEP-based multi-patch modeling and analysis framework.
报告人简介：
郭玉杰，现任南京航空航天大学讲师，航空宇航学院特聘副研究员。2016年1月博士毕业于荷兰代尔夫特理工大学航空结构与计算力学系。主要从事计算固体力学方面的研究，包括等几何方法（Isogeometric Analysis）、板壳结构稳定性等。在CAD/CAE一体化研究领域，针对CAD剪裁曲面及实际工程结构的等几何分析开展研究。目前主持国家、江苏省自然科学青年基金。
