Technical Visit to EB Group

On April 2nd, 2025, LAMAR carried out a technical visit to Grupo EB, located in Piracicaba-SP. The activity was part of the laboratory’s initiatives aimed at strengthening the relationship between the university and the productive sector.

During the visit, participants had the opportunity to closely observe the manufacturing, assembly, and testing processes of centrifugal pumps and other industrial equipment developed by the group. The Grupo EB team also presented their technological solutions and the challenges they face in developing products for various industrial sectors.

The visit provided an important moment for the exchange of experiences between researchers and industry professionals, reinforcing LAMAR’s commitment to high-level technical formation and the pursuit of strategic partnerships that contribute to the advancement of national engineering.

We thank Grupo EB for their warm welcome and for the opportunity to learn more about their installations and market operations!

Participation in the 20th Edition of the DINAME

The Laboratory of Rotating Machines (LAMAR) had a prominent participation in the 20th edition of the DINAME Congress – International Symposium on Dynamic Problems of Mechanics, held from March 9 to 14, 2025, in Águas de Lindóia, São Paulo, Brazil.

The event, one of the most traditional and significant in the field of Dynamics and Vibrations in Brazil, brought together researchers, students, and professionals from various national and international institutions. LAMAR was represented by a team of students, professors, and collaborators who presented works in dynamic modeling, mechanical systems, and numerical methods applied to engineering.

Several studies developed within the laboratory were presented, highlighting the quality of the scientific research conducted at LAMAR. The presentations sparked productive discussions and contributed to the strengthening of partnerships with other research groups in Brazil and abroad.

In addition to the technical presentations, LAMAR members attended lectures, reinforcing the laboratory’s commitment to academic excellence and the pursuit of innovative solutions to engineering challenges.

Participation in DINAME 2025 reaffirms LAMAR’s role as a reference in the field of Rotating Machinery Dynamics, promoting scientific exchange, and disseminating knowledge produced at our institution.

During the event, the LAMAR was represented by the following speakers:

Lecturer: BSc. Edilberto Kallel Gibson N. Costa

Presented article:  Failure analysis in wind turbine transmission systems: probabilistic modeling of wind behavior in system vibration analysis (Costa et al.).

Lecturer: BSc. Carlos Eduardo Agnelli de Souza

Presented article:  Parametric sensitivity analysis on the dynamic response of multi-shaft systems (Souza et al.).

Lecturer: MsC. Vitor Mateus Martini

Presented article: Evaluation of the dynamic behavior of a rotating system on a nonlinear support structure under different loads  (Martini et al.).

Lecturer: Prof. Dr. Hélio Fiori de Castro

Presented article: Explainable surrogate model for a rotor using bayesian neural networks, fourier series and sobol index  (Neto et al.).

Lecturer: MsC. Eduardo Henrique de Paula

Presented article: Dynamic modeling of a planetary geared rotor system  (Paula et al.).

Lecturer: MsC. Iago Oliveira de Almeida

Presented article: Failure signatures identification in rotors: a similarity-based modeling using a comprehensive database (Oliveira et al.).

Lecturer: Prof. Dr. Tiago Henrique Machado

Presented article: Machine learning in liftoff condition monitoring (Gusmão et al.).

Lecturer: Natalia Aparecida Ferreira 

Presented article: Effect of cavitation on the dynamic performance of lubricated cylindrical bearings (Ferreira et al.).

Lecturer:  MsC. João Henrique de Pontes 

Presented article: Influence of hydrodynamic bearings on a multi-shaft dynamic system of a horizontal axis wind turbine (Pontes et al.).

Workshop: LAMAR Exchange

On February 26, 2025, LAMAR held a special workshop on academic exchange programs. The aim was to present research opportunities abroad and encourage students to pursue an academic career.

During the event, they discussed the advantages of international experience, the institutional partnerships available, and the ways to obtain scholarships. In addition, students who have already had the opportunity to go on exchange shared their experiences at foreign universities, inspiring participants to expand their scientific frontiers.

PhD Candidates Iago O. de Almeida and Vitor M. Martini did their exchange at TU Berlin through the CAPES/PROBAL Program in partnership with the German Academic Exchange Service (DAAD). At the workshop, they shared their experiences in Berlin and presented some of the work carried out during the exchange. 

During his time at TU Berlin, PhD Candidate Iago O. de Almeida worked on the mathematical modeling and experimental analysis of gas foil bearings, a type of aerodynamic bearing that uses a thin layer of gas (usually air) as a support medium for the rotating shaft.  He also studied the effects of ovalization failure on this type of bearing. 

At TU Berlin, PhD Candidate Vitor M. Martini simulated a support structure with non-linear (static) behavior and connected it to the rotor with mixed coordinates (physical for the rotor, modal for the foundation). In this way, the student visualized the effects of the vibration modes of the non-linear support structure on the overall response of the rotating system.  

Another student who presented at the workshop was PhD Candidate Marcus V. M. Oliveira, who did an exchange at the University of Bath, in England, through FAPESP's BEPE Program (Research Internship Abroad Grant), grants #2024/03002-9. The student presented some of the work carried out during the exchange and also shared his experiences in Bath. 

At the University of Bath, PhD Candidate Marcus V. M. Oliveira evaluated the behavior of the shaft orbit as a function of the variation in the flow rate of the input oil in hydrodynamic bearings. The experimental tests were carried out on an experimental bench available at the university.

We would like to thank everyone who took part and contributed to the success of the workshop! We remain available to support our students in their search for academic and professional growth opportunities. 

LAMAR Presentation for the 2025 Freshmen Student of the School of Mechanical Engineering

At the start of the 2025 academic year, our laboratory welcomed UNICAMP's Mechanical Engineering freshmen for a special presentation, showcasing fundamental concepts of structural dynamics and rotating systems through hands-on experiments.

One highlight was the demonstration of resonance and vibration modes using a thin beam (ruler) excited by an electrodynamic shaker. By varying the excitation frequency, students could observe the amplification of vibration amplitudes at the structure’s natural frequencies, effectively illustrating resonance effects and the importance of vibration control in engineering applications.

Another experiment presented magnetic bearings, a technology that enables shaft support without physical contact, eliminating friction and wear.

This initiative gave new students a concrete view of the laboratory's research areas, sparking interest and encouraging future collaborations.

We thank all the participants and hope to see you soon at our academic and scientific activities!

3° Postgraduate Seminar at the Rotating Machinery Laboratory at UNICAMP

On November 25th, the 3rd Internal Conference of LAMAR (COIL) was held with the objective of fostering the advancement of scientific research among its members. In addition to the participation of undergraduate, master's and doctoral students, the event included the presence of postdoctoral fellows and researchers. Various topics within the field of rotating machinery were addressed, such as machine monitoring using AI, prognostics, wind turbines, gears, and magnetic bearings. Below is a list of the presented works.

The lecturers and topics covered are listed below:

MsC. Vitor Martini

Evaluation of the dynamic behavior of a rotating system on non linear supports.

MsC. Matheus Victor Inacio

Identification of Non-Circular Profiles in Hydrodynamic Bearings.

Alef Warol

Design of a Planetary Transmission for an Electrified Agricultural Machine Implement.

MsC. Eduardo Henrique de Paula

Effects of Tooth Root Cracks on the Dynamic Response of a Coupled Rotor-Planetary Gear System.

Sidney Araujo Mendonça

Failure Analysis in Rotors Supported by Magnetic Bearings Using Their Control Signal.

Dr. Arthur Mereles

Application of Magnetic Bearings in Rotating Machinery.

Edilberto Kallel Gibson Nascimento Costa

Probabilistic Modeling of Wind Behavior in System Vibration Analysis.

MsC. Olympio Belli

Fault Parameter Quantification with a Bayesian Surrogate Model for Coupling Misalignment in a Rotor System.

Rafael Roberto Xavier Castro

Modeling of a Test Bench Applied to Wind Turbines.

Nicolas Maiochi

Analysis of Numerical Methods for Solving Nonlinear Equations and Systems for Static Problems.

Enzo Vicente Garcia

Study of the Galerkin Method Applied to the Solution of the Reynolds Equation in Axial Bearings.

Gabriel Lopes Soderi

Calculation of the Lubricant Temperature Distribution in Sliding Bearings.

Murilo Barros Scalari

Study of the Stability of Numerical Integrators for Solving Ordinary Differential Equations.

Isabelle de Arruda Castilho

Stability Analysis of an Inverted Pendulum Subject to Pivot Oscillations.

2° Postgraduate Seminar at the Rotating Machinery Laboratory at UNICAMP

On July 3, 2nd Internal Conference of LAMAR (COIL), which allowed undergraduate, master's, doctoral and post-doctoral students to share their progress in developing new techniques and studies in the field of rotating machinery. 

The lecturers and topics covered are listed below:

Dr. Arthur Mereles

Fluid-induced instability in hydrodynamic bearings.

MsC. Gabriel Gomes

Flexible coupling effects of a metallic disk subjected to angular misalignment.

Dra. Laís Carrer

Failures in ball bearings.

Dr. Lucas Garpelli

Signal analysis - Mistakes I made.

MsC. Olympio Belli

Reliable Data-Based Models applied to Rotating Machines.

Jonas Valani

Workbench design for evaluating mechanical seals.

MsC. Eduardo de Paula

Dynamic modeling of a coupled rotor-planetary gear system.

Carlos Eduardo Agnelli

Parametric sensitivity analysis of the dynamic response of multi-axis systems.

Rafael Zaniboni

Dynamic topological optimization of a flexible coupling.

Ana Luiza Borim

Verification and validation of numerical and reduced models of rolling element bearings (balls and rollers).

Edilberto Kallel

Fault Analysis in Wind Turbine Transmission Systems: Probabilistic Modeling of Wind Behavior in System Vibration Analysis.

Samuel Volpato Queiroz

Restructuring of a teaching bench for the study of rotary unbalance.

MsC. Leonardo Lima Gusmão

Identification of the take-off phenomenon in plain bearings by analyzing vibration signals using machine learning.

MsC. Roberto Luiz Escobar

Estimating the Remaining Useful Life (RUL) of Mechanical Systems.

Natália Aparecida Ferreira

Comparison of Computational Models to Evaluate the Impact of Cavitation on the Static Performance of Lubricated Bearings.

MsC. Iago Oliveira

Failures in Gas Foil Bearings: Numerical Analysis and Experimental Validation of Wear and Ovalization.

MsC. Vitor Martini

Extraction of the dynamic behavior of a rotor mounted on a flexible support structure by substructuring.

Participation in the 1st Brazilian School of Rotor Dynamics

The researchers and students from LAMAR attended the First Brazilian School of Rotor Dynamics, which took place on May 2 and 3, 2024, on the USP campus in São Carlos. The event brought together the main research groups focused on rotating machinery in Brazil.

During these two days, four keynote lectures and 24 presentations of scientific papers were given on the following topics: Rotor Modeling, Model Reduction, Orthotropic Rotor, Bearing and Seal Modeling, Fault Detection, Unbalance and Active Bearing.

Representing LAMAR were Prof. Dr. Kátia Lucchesi Cavalca and seven graduate students, whose presentations are listed below:

Lecturer: Matheus Victor Inacio

Presented article: Fault Identification in Hydrodynamic Bearings through Machine Learning.

Lecturer: Matheus de Morais

Presented article: Learning Algorithms and Uncertainty Quantification Applied to Rotating Machine Problems

Lecturer: Natália Aparecida Ferreira

Presented article: Comparison of computational models to evaluate the impact of cavitation on the static performance of lubricated bearings.

Lecturer: Marcus Vinicius Medeiros Oliveira

Presented article: Real-time monitoring for detection and identification of multi failures in rotating systems.

Lecturer: Felipe Wenzel da Silva Tuckmantel

Presented article: Dynamic model of rotating systems applied to gas turbine design: A case study

Lecturer: Lucas Nogueira Garpelli

Presented article: Neural networks guided by physics applied to rotor unbalance problems.

Lecturer: Olympio Belli Neto

Presented article: A Frequency Domain Bayesian Surrogate Model for Rotor Crack Faults. 

Link to Recorded Lectures: https://www.youtube.com/@EBDRotores