黑龙江科技信息
黑龍江科技信息
흑룡강과기신식
HEILONGJIANG SCIENCE AND TECHNOLOGY INFORMATION
2015年
4期
6-7
,共2页
薄壁件模型%中面抽取%NURBS曲面拟合
薄壁件模型%中麵抽取%NURBS麯麵擬閤
박벽건모형%중면추취%NURBS곡면의합
Thin-wall model%Mid-surface abstraction%NURBS fitting
薄壁件模型广泛应用于复杂且高精度的产品设计中，例如航空结构件、汽车覆盖件和注塑模型等。在模型进行有限元仿真分析前，通常需要对模型进行简化以提高分析效率。而薄壁件模型最有效的简化方式就是中面抽取，简化后模型转换为2D的中面模型。现在已经有很多关于中面抽取的研究，但是这些方法仅能处理一些简单的薄壁件模型，而对一些几何复杂的薄壁件模型无法处理。本文提出了一种基于NURBS曲面拟合的中面抽取方法，很好的解决了具有复杂几何的薄壁件模型的中面抽取问题。最后，通过实例验证方法的有效性和鲁棒性。
薄壁件模型廣汎應用于複雜且高精度的產品設計中，例如航空結構件、汽車覆蓋件和註塑模型等。在模型進行有限元倣真分析前，通常需要對模型進行簡化以提高分析效率。而薄壁件模型最有效的簡化方式就是中麵抽取，簡化後模型轉換為2D的中麵模型。現在已經有很多關于中麵抽取的研究，但是這些方法僅能處理一些簡單的薄壁件模型，而對一些幾何複雜的薄壁件模型無法處理。本文提齣瞭一種基于NURBS麯麵擬閤的中麵抽取方法，很好的解決瞭具有複雜幾何的薄壁件模型的中麵抽取問題。最後，通過實例驗證方法的有效性和魯棒性。
박벽건모형엄범응용우복잡차고정도적산품설계중，례여항공결구건、기차복개건화주소모형등。재모형진행유한원방진분석전，통상수요대모형진행간화이제고분석효솔。이박벽건모형최유효적간화방식취시중면추취，간화후모형전환위2D적중면모형。현재이경유흔다관우중면추취적연구，단시저사방법부능처리일사간단적박벽건모형，이대일사궤하복잡적박벽건모형무법처리。본문제출료일충기우NURBS곡면의합적중면추취방법，흔호적해결료구유복잡궤하적박벽건모형적중면추취문제。최후，통과실례험증방법적유효성화로봉성。
Thin-wall model has widely used in the design of complex and high-quality products, such as aircraft structural, the cover of automobile or Injection models. In order to increase the efficiency of the Finite Element Analysis (FEA), the designed models are usually need to be simplified before FEA. The most efficient simplification method for thin-wall model is mid-surface abstraction, the resultant model is abstracted to be the 2D mid-surface model. Nowadays plenty of approaches research on mid-surface abstraction. However, they can only deal with a few simple models, but for some models with complex geometry cannot handle. In this approach, a NURBS fitting method based mid-surface abstraction method is proposed, which is a good solution to deal with complex thin-wall models. Finally, several case studies are demonstrated the effectiveness and robustness of this method.
