scholarly journals Comparative analysis of methods and results of numerical calculations of plywood panel

2017 ◽  
Vol 117 ◽  
pp. 00098
Author(s):  
Irene Ladnykh ◽  
Alexander Ibragimov
2017 ◽  
Vol 22 (4) ◽  
pp. 901-919 ◽  
Author(s):  
M. Graba

Abstract This paper provides a comparative analysis of selected parameters of the geometric constraints for cracked plates subjected to tension. The results of three-dimensional numerical calculations were used to assess the distribution of these parameters around the crack front and their changes along the crack front. The study also involved considering the influence of the external load on the averaged values of the parameters of the geometric constraints as well as the relationship between the material constants and the level of the geometric constraints contributing to the actual fracture toughness for certain geometries.


2018 ◽  
Vol 8 (3) ◽  
pp. 4-7
Author(s):  
Anton O. GLAZACHEV ◽  
Liliya Y. GIMADETDINOVA ◽  
Alexey P. GONCHARUK ◽  
Igor V. NEDOSEKO

The article presents a comparative analysis of the results of the calculation of rigid pavement on the shear stability obtained by the classical engineering method and using numerical calculations. The conclusion is made about the possibility of using modern design tools to select the optimal design of rigid pavement.


2021 ◽  
pp. 28-39
Author(s):  
Stanislav N. Girin Girin

. The comparative analysis of the regulatory framework of the rules of the Russian river register (PRR) and the Russian maritime register of shipping (PMR) on the design and strength of ships on underwater wings (SEC) showed a significant difference between the methodologies of these rules. In this regard, a comparative analysis of the rules is possible only by performing numerical calculations for specific vessels. This paper presents the results of calculations for three SEC models. It is shown that with some extrapolation of the dependences given in the PRR, the values ​​of the calculated values ​​of bending moments for SEC, intended for operation on the excitement of h3%> 2.0 m, can be obtained from the PMR. For more weak wave modes Settlements. The existing approach to the pro-willer of the strength of the SEC wing devices should be recognized obsolete. It is necessary to either upgrade the PRR, taking into account modern advances in the field of hydrodynami, or allow the use of modern software complexes for computers based on numerical methods for solving hydrodynamic problems.


Author(s):  
Marina Shitikova ◽  
Vladimir Kandu

In the present paper, the force driven dynamic response of a nonlinear plate embedded in a viscoelastic medium, damping features of which are described by the Kelvin-Voigt fractional derivative model, is studied. The motion of the plate is described by three coupled nonlinear differential equations with due account for the fact that the plate is being under the conditions of the internal combinational resonance accompanied by the external resonance, resulting in the interaction of three modes corresponding to the mutually orthogonal displacements. A comparative analysis of numerical calculations for the cases of free and forced vibrations has been carried out.


2021 ◽  
pp. 106-113
Author(s):  
В.А. Полуэктов ◽  
Е.М. Якутин

Введение. Статья является продолжением исследования авторов, посвященного сравнению наиболее известных и распространенных методов управления запасами. В настоящей статье представлены результаты расчетов числового примера по ряду алгоритмов, приведен сравнительный анализ полученных данных, сформулированы рекомендации по использованию рассмотренных методов на практике, при условии соответствия допущениям, заложенным в приведенных расчетах. Данные и методы. В статье проведены расчеты общих затрат на поддержание запасов такими методами, как алгоритм Вагнера-Уайтина (Wagner-Whiting algorithm), эвристический метод Гроффа (Groff`s Rule), метод баланса затрат (Part Period Balancing, PPB), метод периодического размера заказа (Periodic Ordering Quantity, POQ). Результаты указанных расчетов объединены с полученными ранее в предыдущей публикации по данной проблематике. Сравнение полученных результатов позволило выделить на основе ранжирования наиболее оптимальные методы управления запасами в условиях сделанных допущений. Полученные результаты. Авторами сформулированы выводы относительно применения рассмотренных методов управления запасами на практике. Исходя из соотнесения отдельных элементов общих затрат на поддержание запасов даны соответствующие рекомендации. Выделены проблемы при определении размеров оптимальных партий пополнения запасов в случаях, когда на практике реальные условия (переменные модели) будут существенно отличаться от условий рассмотренного числового примера. Заключение. Результаты представленной публикации могут быть использованы на практике хозяйствующими субъектами, деятельность которых связана с созданием и поддержанием значительных объемов запасов, в целях оптимизации партий их поставок по критерию минимума общих затрат на хранение и пополнение Introduction. The article is a continuation of the authors ' research on the comparison of the most well-known and common methods of inventory management. This article presents the results of numerical calculations of example, a number of algorithms, a comparative analysis of the data obtained, recommendations for using the methods in practice, provided that the assumptions used in the calculations. Data and methods. The article calculates the total cost of maintaining inventory using such methods as the Wagner-Whiting algorithm, the Groff's Rule heuristic method, the Part Period Balancing (PPB) method, and the Periodic Ordering Quantity (POQ) method. The results of these calculations are combined with those obtained earlier in the previous publication on this issue. A comparison of the results obtained allowed us to identify, on the basis of ranking, the most optimal methods of inventory management, under the conditions of the assumptions made. The received results. The authors draw conclusions about the application of the considered methods of inventory management in practice. Based on the correlation of individual elements of the total cost of maintaining stocks, appropriate recommendations are given. Problems are identified in determining the size of optimal replenishment batches in cases where in practice the real conditions (model variables) will differ significantly from the conditions of the considered numerical example. Conclusion. The results of the presented publication can be used in practice by economic entities whose activities are associated with the creation and maintenance of significant volumes of stocks, in order to optimize the batches of their supplies according to the criterion of the minimum total cost of storage and replenishment.


2014 ◽  
Vol 1020 ◽  
pp. 165-170 ◽  
Author(s):  
Maciej Major ◽  
Izabela Major

Adina is a software that supports analysis of both pre-defined models and analysis of the models defined independently. The paper presents a comparative analysis of the distribution of effective stress in simple elastic structures made of incompressible hyperelastic Mooney - Rivlin and Zahorski materials. To carry out numerical calculations for the Zahorski material it was necessary to make modifications of 2D and 3D libraries in the ADINA software which has been completed in the authorial process. Conclusions are presented in the conclusions at the end of the study.


2017 ◽  
Author(s):  
Valter Cergol ◽  
Alessandro Toson ◽  
Romualdo Di Giovanni

A comparative analysis is performed between the numerical calculations and the measurements carried out on board regarding noise and vibration levels on passenger ships. Based on the comparison, the accuracy of the results obtained with the numerical calculations is assessed and discussed.


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