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首页> 外文期刊>Key Engineering Materials >TopoIogy Optimization of the Inner Reinforcement for an Automobile Hood Using Modal Design Sensitivity Analysis
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TopoIogy Optimization of the Inner Reinforcement for an Automobile Hood Using Modal Design Sensitivity Analysis

机译：基于模态设计灵敏度分析的汽车发动机罩内部加强的拓扑优化

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摘要

Topology optimization technique to find an optimized path of an inner reinforcement of a shell- typed structure is proposed on the basis of the modal design sensitivity analysis. The strength and mode characteristics of an automobile hood are analyzed and their design sensitivity analyses with respect to the thickness of the shell structure are carried out using MSC/NASTRAN. According to the strength and mode design sensitivity analyses, determination of design variables and response functions for the topology optimization is discussed. Many approaches to improve mode characteristics of the automobile hood from design sensitivity information are suggested. Available methods for direction finding and step size determination of the topology optimization process are suggested and their advantages and disadvantages are discussed. Finally the double- layer method is proposed to optimize the path of stiffener for a shell structure. Using the proposed method, we redesign a new inner reinforcement of the automobile hood and compare the mode responses with the original design. It is confirmed that new design is improved in the view of the natural frequency responses without increasing the weight of the automobile hood.
机译：在模态设计敏感性分析的基础上，提出了一种拓扑优化技术，以寻找壳型结构内部加强筋的优化路径。分析了汽车引擎盖的强度和模式特性，并使用MSC / NASTRAN对外壳结构的厚度进行了设计灵敏度分析。根据强度和模式设计敏感性分析，讨论了用于拓扑优化的设计变量和响应函数的确定。提出了许多从设计灵敏度信息来改善汽车发动机罩的模式特性的方法。提出了用于拓扑优化过程的方向寻找和步长确定的可用方法，并讨论了它们的优缺点。最后，提出了双层方法来优化壳结构的加劲肋路径。使用提出的方法，我们重新设计了汽车引擎盖的新内部加强件，并将模式响应与原始设计进行了比较。可以肯定的是，从自然频率响应的角度来看，新设计得到了改进，而没有增加汽车引擎盖的重量。

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