Topology optimization of composite material plate with respect to sound radiation

2011 ◽  
Vol 35 (1) ◽  
pp. 61-67 ◽  
Author(s):  
Z.S. Xu ◽  
Q.B. Huang ◽  
Z.G. Zhao
Keyword(s):  
Composite Material ◽  
Topology Optimization ◽  
Sound Radiation

Topology optimization for 3D microstructures of viscoelastic composite materials

2021 ◽  
Author(s):  
Jianglin Yang ◽  
Shiyang Zhang ◽  
Jian Li
Keyword(s):  
Composite Material ◽  
Topology Optimization ◽  
Viscoelastic Material ◽  
Effective Properties ◽  
Vibration Damping ◽  
Homogenization Theory ◽  
Viscoelastic Composite ◽  
Viscoelastic Composite Material ◽  
High Stiffness ◽  
Beso Method

Abstract Materials with high stiffness and good vibration damping properties are of great industrial interest. In this paper, a topology optimization algorithm based on the BESO method is applied to design viscoelastic composite material by adjusting its 3D microstructures. The viscoelastic composite material is assumed to be composed of a non-viscoelastic material with high stiffness and a viscoelastic material with good vibration damping. The 3D microstructures of the composite are uniformly represented by corresponding periodic unit cells (PUCs). The effective properties of the 3D PUC are extracted by the homogenization theory. The optimized properties of the composites and the optimal microscopic layout of the two materials phases under the conditions of maximum stiffness and maximum damping are given by several numerical examples.

Topology Optimization of Applied Damping Material for Noise Control

2012 ◽  
Vol 629 ◽  
pp. 530-535
Author(s):  
Wei Guang Zheng ◽  
Ying Feng Lei ◽  
Qi Bai Huang ◽  
Chuan Bing Li
Keyword(s):  
Finite Element ◽  
Topology Optimization ◽  
Isotropic Material ◽  
Optimization Design ◽  
Sound Radiation ◽  
Design Tool ◽  
Viscoelastic Layer ◽  
Frequency Range ◽  
Damping Material ◽  
Broadband Frequency

Applied damping material (ADM) is today widely used to reduce vibrations and sound radiations by damping out the resonant peaks of structures. The efficient use of ADM becomes more and more important from an optimization design view. In this paper, the potential of using topology optimization as a design tool to optimize the distribution of ADM on a vibrating plate to minimize its sound radiation is investigated. A solid isotropic material with penalization model is described based on a special interface finite element modeling for viscoelastic layer. Numerical analysis has been applied to demonstrate the validation of the proposed approach and shows that significant reductions of the sound radiation powers over a broadband frequency range are achieved by the optimized results.

Optimization Methodology for an Automotive Composite Hood

2013 ◽  
Author(s):  
Alberto Lazzarini ◽  
Alessandro Valgimigli ◽  
Andrea Baldini ◽  
Enrico Dolcini ◽  
Stefano Sangermano
Keyword(s):  
Composite Material ◽  
Topology Optimization ◽  
Automotive Industry ◽  
Point Of View ◽  
Design Phase ◽  
Trial And Error ◽  
Varying Thickness ◽  
Optimization Methodology ◽  
Prototype Phase ◽  
Actual Part

The current emissions regulations lead car manufacturers to look carefully for weight reduction. In the automotive industry the classic trial-and-error approach to design is becoming inadequate and techniques based on optimization are necessary to improve the design process. In this study a methodology to design a sport-car front hood is proposed. The process carried out could also be extended to car components characterised by a similar configuration. Starting from the geometry of the actual part, a design volume has been defined. The first step consists of a topology optimization performed considering the material as isotropic (aluminium properties): the output is a rough structure which accomplishes all the imposed targets. The interpretation of the topology results brings to a re-design phase aimed at realising a feasible component. The subsequent optimization step is dedicated to composite material structures and acts on the component plybook, varying thickness and orientation of each ply to find the best solution complying with targets. Finally, the component has to be reviewed from a technological point of view in order to be virtually delivered and to proceed with the prototype phase.

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