Response Adjustability Analysis of Partial and Ordinary Differential Coupling System for Visco-Elastomer Sandwich Plate Coupled with Distributed Masses under Random Excitation via Spatial Periodicity Strategy

Ying, Z. G.; Ruan, Zhi-Gang; Ni, Yiqing

doi:10.3390/sym14091794

Cited by 5 publications

(2 citation statements)

References 28 publications

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“…By using statistical methods to account for this uncertainty, a more realistic estimation of the structure's performance can be obtained. Therefore, some other researchers investigated vibration analysis of sandwich structures [30], [31], [32][33] [34][35][36] [37]. However, this method possesses some drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Classifying Cutout Shapes and Predicting Cutout Location using Regression and Classification Techniques

2023

jjmie

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The shape and location of cutouts in sandwich structures are important factors that can greatly affect the natural frequencies of these structures. Cutouts can change the overall stiffness and mass distribution of the structure, which can result in changes to the natural frequencies. Cutout shape can also affect how the structure deforms under load, which can further impact the natural frequencies. The location of the cutout is also critical, as it can change the way the load is distributed throughout the structure. So, understanding how the shape and location of cutouts affect the natural frequencies of sandwich structures is important for the design and optimization of these structures. It can help engineers to minimize the influence of cutouts on the natural frequencies and ensure that the structures perform as desired. Using machine learning techniques to classify cutout shapes and predict cutout locations can also help engineers to better understand these effects, and allow them to make more informed decisions during the design process. Therefore, this study investigates the classification of cutout shapes and the prediction of the cutout locations using different machine-learning methods. Natural frequencies of sandwich structures are obtained using the finite element method to use as input to machine learning methods. Cutout shapes and cutout locations are used as output for classification and regression studies respectively. From the result, it was obtained that the cutout shape was classified with an accuracy of 99.5 %. Also, the cutout location is predicted with an RMSE value of 0.000090883.

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Section: Introductionmentioning

confidence: 99%

Classifying Cutout Shapes and Predicting Cutout Location using Regression and Classification Techniques

2023

jjmie

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“…The nonlinear damping when friction is taken into account is expressed as equivalent mechanical damping as a function of vibration stress. In the work [4], the periodically distributed masses are supported on the plate by coupling springs and dampers. The study [5] was devoted to obtaining approximate solutions of the controlled mass-damper-spring model by the harmonic balance method.…”

Section: Introductionmentioning

confidence: 99%

Method of an Asymptotic Analysis of the Nonlinear Monotonic Stability of the Oscillation at the Problem of Damping of the Angle of Attack of a Symmetric Spacecraft

Lyubimov

2022

Symmetry

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One of the current directions in the development of the modern theory of oscillations is the elaboration of effective methods for analyzing the stability of solutions of dynamical systems. The aim of the work is to develop a new asymptotic method for studying the nonlinear monotonic stability of the amplitude of plane oscillations in a dynamic system of equations with one fast phase. The method is based on the use of the method of variation of an arbitrary constant, the averaging method, and the classical method of mathematical research of the function of one independent variable. It is assumed that the resulting approximate analytical function is defined and twice continuously differentiable on the entire considered interval of change of the independent variable. It describes the nonlinear and monotonic evolution of the oscillation amplitude on the entire considered interval of change of the independent variable. In the paper, this method is applied to the problem of nonlinear monotonic aerodynamic damping of the amplitude of oscillations of the angle of attack during the descent of a symmetric spacecraft in the atmosphere of Mars. The method presented in this paper made it possible to find all characteristic cases of nonlinear monotonic stability and instability of the oscillation amplitude of the angle of attack. In addition, one should speak of a symmetrical quantity of different cases of stability and instability, located on different sides of the zero value of the first average derivative of the angle of attack.

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Detecting Cutout Shape and Predicting Its Location in Sandwich Structures Using Free Vibration Analysis and Tuned Machine-Learning Algorithms

Demircioğlu,

Sayil,

Bakır

2023

Arab J Sci Eng

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Response Adjustability Analysis of Partial and Ordinary Differential Coupling System for Visco-Elastomer Sandwich Plate Coupled with Distributed Masses under Random Excitation via Spatial Periodicity Strategy

Cited by 5 publications

References 28 publications

Classifying Cutout Shapes and Predicting Cutout Location using Regression and Classification Techniques

Classifying Cutout Shapes and Predicting Cutout Location using Regression and Classification Techniques

Method of an Asymptotic Analysis of the Nonlinear Monotonic Stability of the Oscillation at the Problem of Damping of the Angle of Attack of a Symmetric Spacecraft

Detecting Cutout Shape and Predicting Its Location in Sandwich Structures Using Free Vibration Analysis and Tuned Machine-Learning Algorithms

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