Silva, Luiz H. da Silva, Alexandre K.
Published in
Journal of the Brazilian Society of Mechanical Sciences and Engineering
The present study verifies the possibility of analyzing pollutants in an open-channel stream using deep learning algorithms through image analysis. For that, external flow images with and without pollutant, which were obtained with a water table apparatus that is instrumented with a camera and syringes responsible for disposing dyes of different co...
Caballero, E. F. Lobo, D. M. Di Vaio, M. V. Silva, E. C. C. M. Ritto, T. G.
Published in
Journal of the Brazilian Society of Mechanical Sciences and Engineering
This paper aims to analyze the capacity of support vector machines (SVMs) to classify torsional vibrations in drill strings. The features are the weight on bit and the surface rotational speed, and the output is a torsional severity index. SVM is used to estimate the torsional vibration based on two types of training sets. The first one is a numeri...
Yan, Gangfeng
Published in
Journal of the Brazilian Society of Mechanical Sciences and Engineering
This paper presents an approach for developing a neural network inverse model of a piezoelectric positioning stage, which exhibits rate-dependent, asymmetric hysteresis. Unlike most piezoelectric actuators being investigated, the stage involves sliding motion with a maximum range of travel of over 10cm and, therefore, frictional disturbances are si...
Ribeiro, José Geraldo Telles de Castro, Jaime Tupiassú Pinho Meggiolaro, Marco Antonio
Published in
Journal of the Brazilian Society of Mechanical Sciences and Engineering
This paper presents analyses of noise effects in displacement histories measured by double numerical integration of acceleration data. Since such noise-induced errors tend to be highly random, they must be estimated statistically. The noise root mean square (RMS) value can be used to estimate its effect on the actual resolution of acceleration meas...
Savicki, Darci Luiz Goulart, Antonio Becker, Gabriel Zardo
Published in
Journal of the Brazilian Society of Mechanical Sciences and Engineering
In this paper, we present a modification in the standard k-ϵ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$k-\epsilon$$\end{document} turbulence model, together with a...
Mu, Yanming He, Xueming Fang, Zongde
Published in
Journal of the Brazilian Society of Mechanical Sciences and Engineering
To improve the loaded meshing performance (LMP) of high-speed spiral bevel gear transmissions, a multiobjective ease-off optimization design method is proposed. First, an ease-off target surface that meets the functional requirements is established; second, the loaded transmission error (LTE), the relative normal velocity at the initial meshing poi...
Zhong, Rui Guan, Xianlei Wang, Qingshan Qin, Bin Shuai, Cijun
Published in
Journal of the Brazilian Society of Mechanical Sciences and Engineering
In this paper, an energy-spectral boundary element formulation is proposed to study the vibro-acoustic characteristics of elliptical caps immersed in acoustic medium. Based on the first-order shear deformation theory, the energy principle and segment technology are used to establish the structural vibration analysis model. The displacements are wri...
Santos, Diêgo Naron de Souza Costa, Maria Celeste Monteiro Vaz, Cláudio Turani
Published in
Journal of the Brazilian Society of Mechanical Sciences and Engineering
Cast irons are a class of iron-carbon alloys that are extensively utilized owing to their cost-effectiveness, excellent machinability, and high damping capacity. Nodular cast irons, also known as ductile irons and spheroidal graphite cast irons exhibit superior tenacity, ductility, and mechanical strength, thereby making them suitable for more dema...
Mahendran, R. Rajkumar, P. Nirmal Raj, L. Karthikeyan, S. Rajeshkumar, L.
Published in
Journal of the Brazilian Society of Mechanical Sciences and Engineering
High-strength materials are hard to machine with ordinary tools and necessitates tool inserts of high strength and hardness to machine them. One of the methods to improve the physical properties of an insert material is cryogenic treatment which involves the treating of materials at low temperatures. In the current experiments, two multilayer carbi...
Velmurugan, V. Manimaran, G. Ross, K. Nimel Sworna
Published in
Journal of the Brazilian Society of Mechanical Sciences and Engineering
Ti-6Al-4V is a superior performance alloy and progressively observing boundless use in aerospace and medical industries. Machining of this alloy is extremely troublesome because of its meagre thermal conductivity, reactive nature with tool material and high work hardening. This examination meant to assess the improvement in surface attributes in th...
