Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
STRUCTURAL DYNAMIC RESPONSE MEASUREMENT DEVICE: CONCEPTUAL DESIGN AND TESTING
Submission Author:
Gabriel Klein Lunkes , SC , Brazil
Co-Authors:
Gabriel Klein Lunkes , Carlos Eduardo de Souza
Presenter: Gabriel Klein Lunkes
doi://10.26678/ABCM.COBEM2021.COB2021-0692
Abstract
One of the main demands of mechanical engineering is currently obtaining, in mathematical terms, a way to describe the dynamic behavior of a system with significant physical variables. The ways to control and verify these dynamic characteristics of real systems are as important as the design phase. In this context, Modal Analysis is a process whereby a structure is defined in terms of its dynamic characteristics: natural frequency, damping, and mode shapes. One important technique explored in this study is the Operational Modal Analysis (OMA) that has been a growing field since the last decade. OMA is the most practical solution in many situations because it can be applied to structures in operation and does not require a well-controlled excitation source, which is practical for many large structures under variable loads. This study proposes an affordable concept of a linear acceleration data-logger capable to make important evaluations of the dynamic characteristics. The device development was based on a product design methodology, which is subdivided into informational, conceptual, preliminary and detailed design. The main needs for product development were found as well as its necessary characteristics for the operation and main concepts. With preliminary tests, the low cost solution proved to be capable of acquire, store and manipulate the linear acceleration signal using only open source software and hardware.
Keywords
datalogger, structural dynamics, Vibrations, Accelerometer, Operational Modal Analysis
