Multi-objective optimization of ring stiffened cylindrical shells using a genetic algorithm

Bagheri, M.; Jafari, Ali; Sadeghifar, Morteza

doi:10.1016/j.jsv.2010.08.019

Cited by 29 publications

(15 citation statements)

References 16 publications

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“…(22)) and experimental transfer function (Fig. 7), Genetic Algorithm (GA) [14] is utilized to identify the normal damping coefficient, including the structural damping of flexible carcass and proportion damping of radial sidewall spring. Based on natural selection and genetic theory, GA combining the survival of fittest rules and the exchange mechanism of random chromosomes information forms the efficient global optimization search algorithm and the whole scheme of damping coefficient identification is shown in Fig.…”

Section: Damping Coefficient Identificationmentioning

confidence: 99%

In-plane vibration analysis of heavy-loaded radial tire utilizing the rigid-elastic coupling tire model with normal damping

Liu¹,

Gao²

2018

J. vibroeng.

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Theoretical modeling, parameters identification and vibration characteristic of heavy-loaded radial tire is investigated with rigid-elastic coupling model with normal damping. The normal damping, including structural damping of flexible carcass and proportion damping of distributed sidewall element is added to enrich the flexible beam on modified elastic foundation tire model. The rigid-elastic coupling tire model with normal damping is investigated and derived with finite difference method. The mass, stiffness and damping matrixes of the proposed tire model are analytically related with the structural and geometrical parameters of heavy-loaded radial tire. Taking the error between the analytical and experimental transfer function as the object value, Genetic Algorithm (GA) is utilized to identify the damping coefficients of flexible carcass and distributed sidewall element. The influence of modal order and tire damping parameters on the in-plane transfer function is discussed. The theoretical and experimental results show that the rigid-elastic coupling tire model with normal damping can achieve the sectional feature of in-plane transfer function resulting from the coupling characteristic between the flexible carcass and distributed sidewall element within the frequency band of 300 Hz.

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Section: Damping Coefficient Identificationmentioning

confidence: 99%

In-plane vibration analysis of heavy-loaded radial tire utilizing the rigid-elastic coupling tire model with normal damping

Liu¹,

Gao²

2018

J. vibroeng.

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“…The backward parameters identification based on the experimental modal parameters is proposed to identify the unknown structural parameters, and genetic algorithm (GA) 19 is utilized as the identification tool, which is famous for global optimization dealing with complex system problems.…”

Section: Structural Parameters Identificationmentioning

confidence: 99%

Vibration transfer function of in-plane rigid–elastic-coupled tire model for heavy-loaded radial tire

Liu

Gao

Wang

et al. 2017

Advances in Mechanical Engineering

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The modeling and vibration transfer function of in-plane rigid-elastic-coupled tire model is put forward for researching the heavy-loaded radial tire with the feather of larger radial length and width ratio. The coupled characteristic of tread and sidewall is taken into consideration, and the coupled natural frequencies are analyzed with the normal pressure and fixed rim. The rigid-elastic coupling equation is modeled with the flexible beam on elastic foundation, which tread is modeled as the Euler beam and the sidewall is regarded as the sub-sectional spring with lumped mass. The dynamic equation is discrete with finite difference method, and three-parameter rigid-elastic-coupled tire model is derived based on the geometrical and structural parameters. The structural parameters of the tire are identified by the genetic algorithm based on the experimental modal parameter of heavy-loaded tire, and the higher order modal frequency is predicted with the analytic method. The analytical transfer function between tread and tread, tread and sidewall is derived. Experimental and theoretical results show that the in-plane rigid-elastic-coupled tire model can achieve the higher precision on predicting the transfer function and vibration feature of heavy-loaded tire within the frequency band of 300 Hz, compared with the method which only considers the coupling of tread and rim and is limited to 180 Hz.

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“…Tokugawa [19], the first one observed that the general instability of stiffened cylindrical shell occurs at structural locations between bulkheads or deep frames. Bagheri et al [20], applied the genetic algorithm method to the multi-objective optimization problem of ring stiffened cylindrical shells. The results showed that, stiffening a cylindrical shell, yields lower structural weight, higher natural frequencies and buckling loads.…”

Section: Introductionmentioning

confidence: 99%

Optimum Structural Design of Deep Submarine Pressure hull to achieve Minimum Weight

Fathallah¹,

Helal

2016

The International Conference on Civil and Architecture Engineer

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The pressure hull is a significant structural component of underwater vehicles, to enable them to withstand environmental loadings such as hydrostatical pressure. Geometric configurations such as hull shape, shell thickness, stiffener layout, and type of construction materials are the key factors influencing the structural performance of pressure hulls. This study aims to maximize the structural efficiency of elliptical deep-submerged pressure hull under hydrostatic pressure. Minimize the buoyancy factor of a submarine pressure hull under hydrostatic pressure was proposed as an objective function to achieve Minimum Weight, with constraints on factors such as general instability, buckling of shell between stiffeners, plate yielding, stiffeners yielding and operating depth. The shell thickness, the radii of the ellipse, the stiffeners offsets and the stiffeners dimensions are selected as design variables. Additionally, a sensitivity analysis is performed to study the influence of the design variables on the structural optimum design, the buoyancy factor ， strength and stability ． The Optimization results of this study provide a valuable reference for designers of underwater vehicles.

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Multi-objective optimization of ring stiffened cylindrical shells using a genetic algorithm

Cited by 29 publications

References 16 publications

In-plane vibration analysis of heavy-loaded radial tire utilizing the rigid-elastic coupling tire model with normal damping

In-plane vibration analysis of heavy-loaded radial tire utilizing the rigid-elastic coupling tire model with normal damping

Vibration transfer function of in-plane rigid–elastic-coupled tire model for heavy-loaded radial tire

Optimum Structural Design of Deep Submarine Pressure hull to achieve Minimum Weight

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