WSEAS Transactions on Applied and Theoretical Mechanics最新文献_第5页

Geometrically Non-Linear Dynamic Behavior of Simply Supported Rectangular Plates Carrying a Concentrated Mass 承载集中质量的简支矩形板的几何非线性动力行为

WSEAS Transactions on Applied and Theoretical Mechanics Pub Date : 2022-12-31 DOI: 10.37394/232011.2022.17.22

Mustapha , Hamdani, M. El Kadiri, R. Benamar

{"title":"Geometrically Non-Linear Dynamic Behavior of Simply Supported Rectangular Plates Carrying a Concentrated Mass","authors":"Mustapha , Hamdani, M. El Kadiri, R. Benamar","doi":"10.37394/232011.2022.17.22","DOIUrl":"https://doi.org/10.37394/232011.2022.17.22","url":null,"abstract":"Simply supported plates carrying an added point mass are encountered in many engineering fields, like circuit boards or slabs carrying machines at different locations. Determination of the plate modified dynamic characteristics is a quite laborious task, especially in the non-linear regime, which is rarely treated in the literature. The added mass effect on the plate linear parameters was first examined using Hamilton’s principle and spectral analysis. The modified plate's non-linear fundamental mode was then calculated and its non-linear response to high levels of harmonic excitation was determined. The non-linear formulation, involving a fourth order tensor due to the membrane forces induced in the plate mid-plane by large vibration amplitudes, led to a non-linear algebraic amplitude equation. The iterative solution gave the free vibration case a better qualitative understanding and a quantitative evaluation of the effect of the added mass. The non-linear forced response of the modified plate, examined for a wide frequency range, shows that the added eccentric mass induces changes in the area between the mass location and the simple supports and decreases the non-linear hardening effect. The numerical results, covering new situations, are expected to be useful in engineering applications necessitating for some reason the addition to the plate of a point mass or an adaptation of the plate frequencies in order to avoid the occurrence of undesirable resonances.","PeriodicalId":53603,"journal":{"name":"WSEAS Transactions on Applied and Theoretical Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46838802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Earning Power Modeling for Make to Order Manufacturing System 按订单制造系统的盈利能力建模

WSEAS Transactions on Applied and Theoretical Mechanics Pub Date : 2022-12-31 DOI: 10.37394/232011.2022.17.30

Ghelase Daniela, Daschievici Luiza

引用次数: 0

Numerical Simulation of the Elastic Behavior of the Automotive Brake Disc in Dry Sliding Contact With the Pads 汽车制动盘和制动片干滑动接触弹性行为的数值模拟

WSEAS Transactions on Applied and Theoretical Mechanics Pub Date : 2022-12-31 DOI: 10.37394/232011.2022.17.26

S. Kerrouz, T. Tamine, M. Bouchetara

{"title":"Numerical Simulation of the Elastic Behavior of the Automotive Brake Disc in Dry Sliding Contact With the Pads","authors":"S. Kerrouz, T. Tamine, M. Bouchetara","doi":"10.37394/232011.2022.17.26","DOIUrl":"https://doi.org/10.37394/232011.2022.17.26","url":null,"abstract":"During braking and when the disk brought into contact with the brake pads which represent the friction body, mechanical stresses are imposed at the contact zone. All physical parameters (temperature, pressure speed and mechanical characteristics, and tribological conditions change over time), heat from friction generated at the interface, and temperature may exceed the critical value. All these problems that allowed us to do this study which concerns the numerical simulation by finite elements of a mechanical torque in dry sliding contact with motor vehicle disk/brake pads at the moment of stop braking using the ANSYS calculation code 14.5 which is based on the finite element method with its friction contact management algorithms. This behavior was analyzed in the transient case in terms of equivalent stresses and deformations (Von Mises) as a function of the braking conditions ( the type of loading, the speed of rotation of a disk, the pressure force applied to the brake pads, the coefficient of friction between the disk and the pads), and the thermal conditions (the temperature of the disk, and the heat flux in the disk, and the heat exchange by convection over the entire surface of the disk), the geometrical characteristics of the disk pads assembly and the position of the pads with respect to the brake disk and the mechanical parameters assembly and the position of the pads with respect to the brake disk and the mechanical parameters ( Young’s modulus, density, Poisson coefficient). This analysis allows us to see the behavior of the disk and the pads in contact and to recognize these damages in order to find the optimal technological solutions that will meet the needs of the engineer responsible for the design of the braking system, in particular the disk-pads torque, and to improve this system and make it more reliable and for an optimal and economical choice of the disk and pads well resist heat.","PeriodicalId":53603,"journal":{"name":"WSEAS Transactions on Applied and Theoretical Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47316270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

TRIAD-Aided EKF for Satellite Attitude Estimation and Sensor Calibration 用于卫星姿态估计和传感器校准的TRIAD辅助EKF

WSEAS Transactions on Applied and Theoretical Mechanics Pub Date : 2022-12-31 DOI: 10.37394/232011.2022.17.25

Mehmet Asim Gokcay, C. Hajiyev

引用次数: 2

Inclined Large-angle Pendulum May Produce Endless Linear Motion of a Cart When Friction is Negligible 在摩擦力可忽略的情况下，倾斜大角度摆可使小车产生无休止的直线运动

WSEAS Transactions on Applied and Theoretical Mechanics Pub Date : 2022-12-31 DOI: 10.37394/232011.2022.17.23

Dennis P. Allen, C. Provatidis

引用次数: 1

Neighborhood, Topography, and Wind Direction Effects on Wind Pressure Distribution on the Low-rise Building Roof 邻域、地形和风向对低层建筑屋顶风压分布的影响

WSEAS Transactions on Applied and Theoretical Mechanics Pub Date : 2022-12-31 DOI: 10.37394/232011.2022.17.24

Vitor G. O. Camilo, M. de Campos

引用次数: 0

On the Solution of Multi-Term Nonlinear Partial Derivative Delay Differential Equations 关于多项非线性偏微分时滞微分方程的解

WSEAS Transactions on Applied and Theoretical Mechanics Pub Date : 2022-11-25 DOI: 10.37394/232011.2022.17.21

W. A. Ahmood, Marwa Mohamed Ismaeel

引用次数: 0

Predicting Essential Genes of Alzheimer Disease based on Module Partition and Gravity-like Method in Heterogeneous Network 异构网络中基于模块划分和类重力方法的阿尔茨海默病基本基因预测

WSEAS Transactions on Applied and Theoretical Mechanics Pub Date : 2022-11-16 DOI: 10.37394/232011.2022.17.20

Haiyan Guo, Shujuan Cao, Chen Zhou, Xiaolu Wu, Yongming Zou

{"title":"Predicting Essential Genes of Alzheimer Disease based on Module Partition and Gravity-like Method in Heterogeneous Network","authors":"Haiyan Guo, Shujuan Cao, Chen Zhou, Xiaolu Wu, Yongming Zou","doi":"10.37394/232011.2022.17.20","DOIUrl":"https://doi.org/10.37394/232011.2022.17.20","url":null,"abstract":"The pathogenic mechanism of Alzheimer's disease (AD) is complicated, predicting AD essential genes is an important task in biomedical research, which is helpful in elucidating AD mechanisms and revealing therapeutic targets. In this paper, we propose a random walk algorithm with a restart in the heterogeneous network based on module partition and a gravity-like method (RWRHNMGL) for identifying AD essential genes. The phenotype-gene heterogeneous network (PGHN) is constructed from multiple data sources by considering similar information. These nodes of the optimal module, selected by module partition and covering most functions of AD gene networks, are taken as gene seeds. A refined random walk algorithm is developed to work in the PGHN, the transition matrix is modified by adding a gravity-like method based on subcellular location information, and candidate genes are scored and ranked by a stable probability vector. Finally, the receiver operating characteristic curve (ROC) and Mean Reciprocal Rank is used to evaluate the prediction results of RWRHNMGL. The results show that the RWRHNMGL algorithm performs better in predicting essential genes of AD.","PeriodicalId":53603,"journal":{"name":"WSEAS Transactions on Applied and Theoretical Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49001284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and Experimental Investigation of Four-Bar Dynamic Testing Machine 四杆动力试验机的设计与实验研究

WSEAS Transactions on Applied and Theoretical Mechanics Pub Date : 2022-11-07 DOI: 10.37394/232011.2022.17.19

Muhammad Maarij, M. Ali, Muhammad Shehryar Manzoor

{"title":"Design and Experimental Investigation of Four-Bar Dynamic Testing Machine","authors":"Muhammad Maarij, M. Ali, Muhammad Shehryar Manzoor","doi":"10.37394/232011.2022.17.19","DOIUrl":"https://doi.org/10.37394/232011.2022.17.19","url":null,"abstract":"This project involved fabricating and experimental investigation of a dynamic testing machine for four-bar mechanisms with various applications. The simple crank rocker inversion is selected, and the kinematic design of the four-bar mechanism is done by keeping in view the Grashof rotatability criteria and the dynamic design required factoring in the forces acting on various links. The flywheel is designed to minimize the fluctuations in the torque required to drive the mechanism. DE-ASME Elliptic criteria is used for the shaft design and selection of bearing. For transmitting power from the AC motor to the crankshaft, a V belt and a pulley are used as the belt helps dampen the vibration effects in the mechanism. The linkages were fabricated, and the mechanism was assembled. ADXL335 accelerometer sensor is mounted on the apparatus to measure the acceleration of a point on the coupler. This acceleration data was then integrated using numerical techniques to estimate velocity and displacement. The model changes can be adjusted according to the dimensions of the bars and angles between the bars to simulate the performance of the mechanism. Due to the inherent offset in the sensor, an error was included in the data. However, the results obtained using such methods were satisfactory in visualizing the behaviour of data representing the system’s motion under running conditions. The errors in the result can be minimized using more advanced integration techniques and sensitive sensors for measurement and instrumentation. This research aims to contribute vital research knowledge for developing sustainable four-bar dynamic testing mechanisms.","PeriodicalId":53603,"journal":{"name":"WSEAS Transactions on Applied and Theoretical Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45980452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization of Ship Fender Under Axial Load Using Taguchi 轴向载荷下船舶护舷优化

WSEAS Transactions on Applied and Theoretical Mechanics Pub Date : 2022-09-21 DOI: 10.37394/232011.2022.17.18

F. Djamaluddin

引用次数: 3