A comprehensive study on parametric airplane nose design using NURBS

Liman, Nadia (2018) A comprehensive study on parametric airplane nose design using NURBS. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

In this modern era, there are a lot of modern technology that can help to draw freeform curve such as spline that refer to a varied class of functions that are used in applications requiring data interpolation or smoothing. NURBS models can be used in any process from illustration to manufacturing because of their flexibility and accuracy. Hence, the concept of NURBS is implemented to the airplane nose design. Airplane nose of Boeing 747 is chosen as an existing design and the improvement design will be done by making a new profile design by using NURBS. Solidworks SimulationXpress and ANSYS Fluid Flow (FLUENT) packages are the software that have been applied in this research study. The results achieved in Linear Static Analysis demonstrated that the decrement in Von Mises Stress and increment in the deformation will make the improvement design to slowly undergo failure condition. By applying the computation of Newton interpolation polynomial to calculate Fatigue Analysis, it indicates that the improvement design will show slower failure condition as the value of initial applied pressure, x is higher when compared with existing design. Additionally, the effectiveness of the design is validated by computing Design Efficiency. The results shows that both improvement and existing designs are acceptable and can be manufactured. Meanwhile, the results for dynamic analysis proved that the improvement design have higher velocity and lower pressure compared to existing design. Thus, the concept of Bernoulli principle is achieved. Moreover, the reliability of airplane nose design is also validated by computing Coefficient of Variation (CV). Improvement design has lowest percentage compared to existing design according to the CV calculation. Therefore, this research shows that the ability of NURBS to model complex free-form curves and surfaces has been implemented in improvement design and has increased the smoothness of the curvature, quality, precision and stability of the design compared to the existing design.

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