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首页> 外文会议>International conference on structural safety and reliability;ICOSSAR'01 >Reliability optimization of aerospace structures for gust response and aileron effectiveness
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Reliability optimization of aerospace structures for gust response and aileron effectiveness

机译：航空结构的阵风响应和副翼有效性的可靠性优化

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Reliability-based optimization of a generic, fighter-like wing structure is conducted forrngust response and aileron effectiveness. This work is performed within a framework that integratesrnASTROS for structural and loads analysis, object-oriented MATLAB tools for reliability analysis,rnand DOT for optimization and most probable point estimation. The reliability analysis algorithmrntakes advantage of adaptive nonlinear approximations to compensate for nonlinearity of the failurernsurfaces. The wing structure is modeled with finite elements, each of which is assumed to have randomrnthickness of known standard deviation. The mean thickness values are taken as design variables.rnLinear unsteady aerodynamics theory is used to estimate frequency response functions due to loadsrninduced by harmonic variations in the vertical component of the freestream velocity. Continuous gustrnexcitation is modeled as a stationary random process that follows the von Karman turbulence spectrum.rnReliability constraints are enforced for gust-induced bending moment and shear at the wing’srnroot, and also for aileron effectiveness. Redistribution of structural mass by the optimizer producesrndesigns with improved aeroelastic performance reliability and only minute weight penalties.
机译：进行通用的，类似战斗机的机翼结构的基于可靠性的优化，以实现猛烈的响应和副翼的效能。这项工作是在一个框架中执行的，该框架集成了用于结构和载荷分析的ASTROS，用于可靠性分析的面向对象的MATLAB工具，用于优化和最可能点估计的DOT。可靠性分析算法利用自适应非线性逼近来补偿破坏面的非线性。机翼结构用有限元建模，每个有限元都假定具有已知标准偏差的随机厚度。平均厚度值被用作设计变量。线性非定常空气动力学理论被用于估计由于自由流速度的垂直分量中的谐波变化所引起的载荷所引起的频率响应函数。连续阵风的激发是遵循von Karman湍流谱的平稳随机过程建模的。对于阵风引起的弯矩和机翼根部的剪切力以及副翼的有效性，实施了可靠性约束。优化器对结构质量的重新分配可产生具有改进的气动弹性性能可靠性且仅对重量有轻微惩罚的设计。

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