Chunlin Gong

TL;DR: In this article, a radial basis function based sequential surrogate reliability method (SSRM) is proposed, in which a special optimization problem is solved to update the surrogate model of the limit state function (LSF) iteratively.

TL;DR: Six numerical examples show that SSRM improves the accuracy of the surrogate model in the important region around the failure boundary with small number of samples and has better adaptability to the nonlinear LSF, hence increases the accuracy and efficiency of the reliability analysis.

TL;DR: The results show that the number of the expensive black-box function calls is reduced exponentially without losing of precision compared to the alternative methods, which illustrates the efficiency and accuracy of the proposed method.

TL;DR: In this paper, a baseline NACA0012 airfoil is modified using a short flap on its upper surface at a Reynolds number of Re = 1000, and the impact of the flap configuration, described by length, attachment position, deployment angle, and material properties, on the aerodynamic performance of the air-foil, measured by mean and fluctuating forces, is investigated.

TL;DR: This study explained the 3D flapping wing thrust performance variation with different wing shapes, aspect ratios and pitch-bias angles of attack and indicated that the obtuse wing has the best thrust performance compared with other sharp wing shapes.