Stiffness and buckling optimization of thin plates with BEM

Katsikadelis, John T.; Babouskos, Nick G.

doi:10.1007/s00419-012-0668-7

Cited by 9 publications

(3 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to check the methodology and performance of the proposed objective function, a genetic algorithm optimization process for a simple supported beam model has been performed (Fig. 4) [18][19][20].…”

Section: Optimization Process Testmentioning

confidence: 99%

Modeling and optimization of resonance characteristics of complex machinery system under dynamic load

et al. 2014

View full text Add to dashboard Cite

The paper deals with the optimization of the dynamic characteristics of a complex machinery system. The algorithms for optimization of the dynamic features have been elaborated and applied for a selection of design variables with the aim of minimizing the vibration amplitudes and optimizing the resonance characteristics of the system. A CAD model of the cutting boom of a continuous miner machine has been selected as an example and was adopted in the LS-PrePost command file. This machine has been selected because it is exposed to complex dynamic forces that cause vibrations and shocks. The paper shows the methodology for the optimization of the modal parameters of the complex mechanical system by using the finite elements method. A new objective function was applied and designed for maximization of the differences between eigenfrequencies and excitation peak force frequencies with respect to the total mass of the system. The genetic algorithm method was used to search for the optimal solution. The influence of parameters on the mass and eigenfrequencies is presented as a result of the sensitivity analysis. During the optimization process, a geometrical parameterized model was applied in order to optimize the system. The results of the modal analysis are part of a complex dynamic simulation of the cutter boom which integrates transmission, drives, and cutting head.

show abstract

Section: Optimization Process Testmentioning

confidence: 99%

Modeling and optimization of resonance characteristics of complex machinery system under dynamic load

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Therefore, recourse to BEM formulations using the known fundamental solution of the biharmonic equation was inevitable to develop BEM solutions for plates with variable thickness. Moreover, the AEM has been employed to solve more difficult problems for plates with variable thickness such as buckling problems [68], large deflections of plates [69], plates on biparametric elastic foundation [70] as well as plate thickness optimization problems to maximize the buckling load or to minimize the deflection [64]. Later, Chaves et al [66] presented another formulation for the problem.…”

Section: Plates With Variable Thickness 167mentioning

confidence: 99%

BEM for Other Plate Problems

Katsikadelis

2014

The Boundary Element Method for Plate Analysis

View full text Add to dashboard Cite

“…Hartmann and Zomantel [25], further developed the method, and implemented it for plate with relatively complex geometries and loadings. Following the above work, others (Tanaka and Miyazaki [62], Fernandes and Venturini [68], Paiva and Aliabadi [42], Albuquerque [2] among others [31,32,55,3,9,41,58,60,23,29,34,64,72]) have further extended the formulation for the classical plate.…”

Section: Introductionmentioning

confidence: 99%

Boundary element analysis of stiffened panels with repair patches

Pisa¹,

Aliabadi²

2015

Engineering Analysis with Boundary Elements

View full text Add to dashboard Cite

In this paper a boundary element method for analysis of fractured stiffened panels repaired with riveted or adhesively bonded patches is presented. In order to achieve such a formulation, several boundary element formulations involving the membrane and bending of displacement, and, stress resultants are coupled together to analyse the model. The multi-region formulation is used to simulate the stiffeners, which are modelled as an assembly. They are then connected to the sheets to form the stiffened panels by means of a rivet formulation. The dual boundary element method is used to simulate the presence of cracks, and the patches, treated as independent plates, are joined to the panel either with rivets or adhesive. A boundary element formulation for adhesive bonding is implemented to model the adhesively bonded patches. The Crack Opening Displacements (COD) method and the Jintegral are implemented to evalute the required fracture parameters. Examples presented include a wing box with a three spar section, with fully stiffened skin, and, the skin is considered to have a crack and a repair patch is used on top of the crack to stop its growth.Response to Reviewers: Thank you for highlighting the missing references and figures numbers as well as certain typo's. We have corrected all the highlighted items.Thank you for highlighting the missing references and figures numbers as well as certain typo's. We have corrected all the highlighted items. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 Detailed Response to Reviewers AbstractIn this paper a boundary element method for analysis of fractured stiffened panels repaired with riveted or adhesively bonded patches is presented. In order to achieve such a formulation, several boundary element formulations involving the membrane and bending of displacement, and, stress resultants are coupled together to analyse the model. The multi-region formulation is used to simulate the stiffeners, which are modelled as an assembly. They are then connected to the sheets to form the stiffened panels by means of a rivet formulation. The dual boundary element method is used to simulate the presence of cracks, and the patches, treated as independent plates, are joined to the panel either with rivets or adhesive. A boundary element formulation for adhesive bonding is implemented to model the adhesively bonded patches. The Crack Opening Displacements (COD) method and the J-integral are implemented to evalute the required fracture parameters. Examples presented include a wing box with a three spar section, with fully stiffened skin, and, the skin is considered to have a crack and a repair patch is used on top of the crack to stop its growth.

show abstract

Stiffness and buckling optimization of thin plates with BEM

Cited by 9 publications

References 31 publications

Modeling and optimization of resonance characteristics of complex machinery system under dynamic load

Modeling and optimization of resonance characteristics of complex machinery system under dynamic load

BEM for Other Plate Problems

Boundary element analysis of stiffened panels with repair patches

Contact Info

Product

Resources

About