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首页> 外文会议>4th International Conference on Integrated Design and Manufacturing in Mechanical Engineering - IDMME 2002 May 14-16, 2002 Clermont-Ferrand, France >INTEGRATION OF RELIABILITY-BASED DESIGN OPTIMIZATION WITHIN CAD AND FINITE ELEMENT MODELS
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INTEGRATION OF RELIABILITY-BASED DESIGN OPTIMIZATION WITHIN CAD AND FINITE ELEMENT MODELS

机译：在CAD和有限元模型中集成基于可靠性的设计优化

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High technology designs aim to define the best compromise between cost and safety. The Reliability-Based Design Optimization (RBDO) allows us to design structures which satisfy economical and safety requirements. However, in practical applications, the coupling between the geometrical modeling, the mechanical simulation, the reliability analyses and the optimization methods leads to very high computing time and weak convergence stability. Traditionally, the solution of the RBDO model is achieved by alternating reliability and optimization iterations (sequential approach). This approach leads to low numerical efficiency, especially when the structure geometry is described by efficient CAD models (such as B-spline or NURBS) which necessitate a great amount of data. In this case, the integration of the sequential RBDO approach with Finite Element Analysis requires lengthy computing time. In order to avoid this difficulty, we propose an efficient method, called the hybrid RBDO method, based on the simultaneous solution of reliability and optimization problems. In this paper, the efficiency of the proposed methodology is demonstrated on a finite element problem using CAD model description.
机译：高科技设计旨在定义成本与安全性之间的最佳平衡。基于可靠性的设计优化（RBDO）使我们能够设计满足经济和安全要求的结构。然而，在实际应用中，几何建模，力学仿真，可靠性分析和优化方法之间的耦合导致计算时间非常长，并且收敛稳定性较弱。传统上，RBDO模型的解决方案是通过交替进行可靠性和优化迭代（顺序方法）来实现的。这种方法导致数值效率低，尤其是当结构几何由高效CAD模型（例如B样条或NURBS）描述时，该模型需要大量数据。在这种情况下，顺序RBDO方法与有限元分析的集成需要很长的计算时间。为了避免这种困难，我们在同时解决可靠性和优化问题的基础上，提出了一种有效的方法，称为混合RBDO方法。在本文中，使用CAD模型描述在有限元问题上证明了该方法的有效性。

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