Shape Optimization Method for Interfacial Strength Problem of Multi-material Structures

Purpose Computational efficiency is always the major concern in aircraft design. The purpose of this research is to investigate an efficient jig-shape optimization design method. A new jig-shape optimization method is presented in the current study and its application on the high aspect ratio wing is discussed. Design/methodology/approach First, the effects of bending and torsion on aerodynamic distribution were discussed. The effect of bending deformation was equivalent to the change of attack angle through a new equivalent method. The equivalent attack angle showed a linear dependence on the quadratic function of bending. Then, a new jig-shape optimization method taking integrated structural deformation into account was proposed. The method was realized by four substeps: object decomposition, optimization design, inversion and evaluation. Findings After the new jig-shape optimization design, both aerodynamic distribution and structural configuration have satisfactory results. Meanwhile, the method takes both bending and torsion deformation into account. Practical implications The new jig-shape optimization method can be well used for the high aspect ratio wing. Originality/value The new method is an innovation based on the traditional single parameter design method. It is suitable for engineering application.

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2409 Shape Optimization Method of 3-D Frame Structures for Maximizing a Natural Frequency

The Proceedings of Design & Systems Conference ◽

10.1299/jsmedsd.2013.23._2409-1_ ◽

2013 ◽

Vol 2013.23 (0) ◽

pp. _2409-1_-_2409-10_

Author(s):

Takashi MORIMOTO ◽

Masatoshi SHIMODA

Keyword(s):

Shape Optimization ◽

Natural Frequency ◽

Optimization Method ◽

Frame Structures

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Sizing and shape optimization material use in 10 bar trusses

MATEC Web of Conferences ◽

10.1051/matecconf/202134304004 ◽

2021 ◽

Vol 343 ◽

pp. 04004

Author(s):

Nenad Petrović ◽

Nenad Kostić ◽

Vesna Marjanović ◽

Ileana Ioana Cofaru ◽

Nenad Marjanović

Keyword(s):

Genetic Algorithm ◽

Shape Optimization ◽

Cross Sections ◽

Optimization Model ◽

Structural Characteristics ◽

Optimization Method ◽

Truss Optimization ◽

Algorithm Optimization ◽

Sizing Optimization ◽

Bill Of Materials

Truss optimization has the goal of achieving savings in costs and material while maintaining structural characteristics. In this research a 10 bar truss was structurally optimized in Rhino 6 using genetic algorithm optimization method. Results from previous research where sizing optimization was limited to using only three different cross-sections were compared to a sizing and shape optimization model which uses only those three cross-sections. Significant savings in mass have been found when using this approach. An analysis was conducted of the necessary bill of materials for these solutions. This research indicates practical effects which optimization can achieve in truss design.

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Structure Vibration Shape Optimization Based on Power Flow Response Analysis

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.490-491.712 ◽

2014 ◽

Vol 490-491 ◽

pp. 712-718

Author(s):

Xue Bao Xia ◽

Yang Xiang ◽

Shao Wei Wu

Keyword(s):

Shape Optimization ◽

Mode Shape ◽

Power Flow ◽

Flow Analysis ◽

Optimization Method ◽

Weight Coefficient ◽

Surface Shape ◽

Response Analysis ◽

Flow Response ◽

Vibration Power Flow

Power flow analysis is a method to describe the dynamic behavior of structures by taking not only the amplitude of exciting force and velocity response into account, but also the phase between the two qualities. Shape optimization is an effective method to reduce vibration level. By choosing the vibration power flow as design objective, a shape optimization method of structure is presented. The structure surface is restructured with a series of mode shape superposition. By using genetic algorithm, the weight coefficient of each mode shape is optimized to get the best surface shape with minimum power flow response. Some examples are demonstrated to verify the efficiency and accuracy of the method.

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