报告题目：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)
报告时间：2017年5月24日（周三）10:10 AM
报告地点：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.
