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Some applications of reliability based design optimization in engineering structures

机译:基于可靠性的设计优化在工程结构中的一些应用

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Structures are subject to uncertainty parameters that need to be considered in the design process. Reliability Based Design Optimization (RBDO) has become a powerful tool in achieving the optimum design when considering uncertainty data. In this work RBDO is applied in two different optimization approaches: size and topology optimization. There is a wide set of methods to solve RBDO problems, among them RIA (Reliability Index Approach), PMA (Performance Measure Approach) and SORA (Reliability Optimization and Reliability Assessment) are the most common in literature. For this work the SORA method has been chosen because it is easy to combine with commercial structural analysis and optimization codes due to the uncoupled nature of its formulation. It has been programmed in a MatLab code which manages the calls to structural analysis and optimization software needed to solve the RBDO problem. Finally, three application examples are used to compare the designs obtained with and without a probabilistic approach.
机译:结构受设计过程中需要考虑的不确定性参数的影响。当考虑不确定性数据时,基于可靠性的设计优化(RBDO)已成为实现最佳设计的强大工具。在这项工作中,RBDO以两种不同的优化方法应用:大小和拓扑优化。有很多方法可以解决RBDO问题,其中RIA(可靠性指数方法),PMA(性能度量方法)和SORA(可靠性优化和可靠性评估)是文献中最常见的方法。对于这项工作,之所以选择SORA方法,是因为它的配方具有分离性,因此很容易与商业结构分析和优化代码结合使用。它已通过MatLab代码进行编程,该代码可管理对解决RBDO问题所需的结构分析和优化软件的调用。最后,使用三个应用示例来比较采用和不采用概率方法获得的设计。

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