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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science >Multifidelity metamodel building as a route to aeroelastic optimization of flexible wings
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Multifidelity metamodel building as a route to aeroelastic optimization of flexible wings

机译：建立多保真度元模型以实现柔性机翼的气动弹性优化

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摘要

High-fidelity aeroelastic simulations of the response of flexible wings to a sudden gust can result in a huge computing effort, making the search for the best wing design prohibitively expensive. As an alternative, a cost-effective multifidelity metamodelling-based optimization strategy, where a metamodel of a high-fidelity aeroelastic simulation response is built by tuning a lower fidelity aeroelastic simulation response, is proposed. In order to address and validate such an approach, both linear and non-linear aeroelastic equations for an aerofoil employing different levels of complexity for expressing the aerodynamic load are used for the high- and low-fidelity models. An aeroelastic gust response evaluation problem is formulated for the flexible wing of a small unmanned air vehicle, whose characteristic size makes it particularly susceptible to gusts. Three different approaches to tune the low-fidelity model, both explicit and implicit, are investigated and compared. Good agreement between the high-fidelity model and the corrected low-fidelity one shows that the proposed approach is indeed suitable for optimization of the aeroelastic gust performance of flexible wings.
机译：对柔性机翼对突然阵风的响应进行的高保真气动弹性仿真可能会导致巨大的计算量，因此寻找最佳机翼设计的成本过高。作为替代方案，提出了一种基于成本效益的基于多保真度元建模的优化策略，该策略通过调整较低保真度的空气弹性仿真响应来构建高保真空气弹性仿真响应的元模型。为了解决和验证这种方法，针对高和低保真度模型，使用了采用不同复杂程度来表示气动载荷的翼型的线性和非线性气动弹性方程。针对小型无人机的柔性机翼提出了气动弹性阵风响应评估问题，其特征尺寸使其特别容易受到阵风的影响。研究和比较了三种用于调整低保真模型的显式和隐式方法。高保真模型与校正后的低保真模型之间的良好一致性表明，该方法确实适用于优化柔性机翼的气动弹性阵风性能。

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