題目：The design-through-analysis workflow in the framework of isogeometric analysis

報告人：郭玉杰 博士(航空宇航學院航空航天交叉研究院)

時間：2017年5月24日（周三）10:10 AM

地點：明故宮校區A18-209會議室

主辦單位：科協、航空宇航學院、航空航天交叉研究院

報告摘要：

    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.

報告人簡介：

    郭玉杰，現任南京航空航天大學講師，航空宇航學院特聘副研究員。2016年1月博士畢業于荷蘭代爾夫特理工大學航空結構與計算力學系。主要從事計算固體力學方面的研究，包括等幾何方法（Isogeometric Analysis）、板殼結構穩定性等。在CAD/CAE一體化研究領域，針對CAD剪裁曲面及實際工程結構的等幾何分析開展研究。目前主持國家、江蘇省自然科學青年基金。