DESIGN AND MANUFACTURE OF A TEST BENCH FOR INDUCING RESONANT REGIMES IN BEAMS OF ROTARY MACHINERY SUPPORT

2021 ◽  
Author(s):  
Alexandre de Macêdo Wahrhaftig ◽  
Reyolando Brasil ◽  
Gabriela Silva Correia Cordeiro
Keyword(s):  
Test Bench ◽  
Rotary Machinery ◽  
Design And Manufacture

Development and Implementation of Adaptive Order Analysis in the Application of Multiaxial Systems

2001 ◽  
Author(s):  
Min-chun Pan ◽  
Jeng-xing Chen
Keyword(s):  
Signal Processing ◽  
Test Bench ◽  
Machine Component ◽  
Order Analysis ◽  
Rotary Machinery ◽  
Spectral Components ◽  
Fixed Order ◽  
Noise Vibration ◽  
Order Components ◽  
Vibration Signatures

Abstract This study investigates the varying-order analysis based on mechanism, and realizes it in dynamic signal processing of rotary machinery. Firstly, the synthetic signatures consisting of fixed-order, varying-order components and resonance-related ones as well are designed to validate the developed computation schemes. Secondly, this work takes an electrical scooter as a test bench, which some experiments have been conducted on. The noise and vibration signatures are measured and processed to characterize different spectral components and identify their sources. Some of the annoying ones belong to fixed order (e.g., gear whine noise), varying order (e.g., CVT-belt noise) and structure resonance (e.g., the structure-borne noise originated from the CVT housing). Therefore, the concerned noise/vibration can subsequently be coped with via machine component modification.

Design of Key Process Parameters Test-Bench for 1250mm2 Large Cross-Section Conductor Tension Stringing

2014 ◽  
Vol 1065-1069 ◽  
pp. 2058-2062
Author(s):  
Yong Jun Xia ◽  
Wen Ming Mei ◽  
Chun Hua Hu ◽  
Jin Miao Zhang
Keyword(s):  
Cross Section ◽  
Test Bench ◽  
Test System ◽  
Test Methods ◽  
Test Scheme ◽  
Construction Technology ◽  
Large Cross Section ◽  
Force Analysis ◽  
Limit Test ◽  
Design And Manufacture

This document proposed the test scheme of limit Test-bench structural system under the setting-out conditions of simulating critical state and completed the design and manufacture of the test system through conducting investigation on test methods and equipment of tension stringing construction process, combining the 1,250mm2 large cross-section conductor and construction technology requirements and based on functional positioning, optimization of combined design and force analysis of Test-bench, mechanics analysis of various parts and their connection as well as allowable stress method check. This system was closer to the actual stringing working conditions, and the obtained data were more reasonable and exact and meet the actual engineering demand. In addition, the reliability of this test system has been verified through the test of 1,250mm2 third-class large cross-section conductor.

Fuel cell test bench design and manufacture By Marie Straumann, Marc Dupont, Daniel Buttin and Jean-Claude Dubois, Sodeteg, France

2000 ◽  
Vol 3 (20) ◽  
pp. 11-13 ◽  
Author(s):  
Marie Straumann ◽  
Marc Dupont ◽  
Daniel Buttin ◽  
Jean-Claude Dubois
Keyword(s):  
Fuel Cell ◽  
Test Bench ◽  
Cell Test ◽  
Design And Manufacture

scholarly journals DEVELOP AN INTEGRATED TECHNICAL SITUATION CONTROL SYSTEM TO CONTROL HIGH QUALITY HELICOPTERS BASED ON FIBER OPTIC TECHNOLOGY

2021 ◽  
Vol 23 (1) ◽  
pp. 21-27
Author(s):  
E.V. Markova ◽  
A.M. Al-Darabseh ◽  
I.E. Daba’bneh ◽  
A.R. Ahmed ◽  
B.T. Arazveliev ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Optical Transmission ◽  
Test Bench ◽  
Fiber Optic ◽  
Integrated Approach ◽  
Physical Parameters ◽  
Test Results ◽  
Optical Transmission Systems ◽  
Fiber Optic Technology ◽  
Design And Manufacture

This article draws attention to the difficulties in developing an integrated approach, especially the evaluation and evaluation of the main helicopter technology. Fiber optic technology is a technology that allows you to create a unified system. This allows the measurement of various physical parameters such as vibration, distortion, temperature, volume and other parameters, given the magnitude of optical fiber science. RMB can be integrated into production, which is an important factor in the amount of RMB related to the design and manufacture of helicopters. The test results, the test bench, and the rotor of the helicopter and light using optical fiber transmission in the Prague fiber optic filter emphasize the importance of developing technology to track the helicopter's use of optical fiber. Other embodiments of the use of optical transmission systems that use fiber-optic technology, such as cable warning of explosives and helicopter damage as well as system weight and transitions. The conduction system monitors air technology.

Investigations of Road Wear Caused by Studded Tires

2014 ◽  
Vol 42 (1) ◽  
pp. 2-15
Author(s):  
Johannes Gültlinger ◽  
Frank Gauterin ◽  
Christian Brandau ◽  
Jan Schlittenhard ◽  
Burkhard Wies
Keyword(s):  
Traffic Safety ◽  
Test Bench ◽  
Operating Conditions ◽  
Test Method ◽  
Analytical Models ◽  
The Road ◽  
Driving Speed ◽  
Major Factors ◽  
Tire Friction ◽  
Variable Operating Conditions

ABSTRACT The use of studded tires has been a subject of controversy from the time they came into market. While studded tires contribute to traffic safety under severe winter conditions by increasing tire friction on icy roads, they also cause damage to the road surface when running on bare roads. Consequently, one of the main challenges in studded tire development is to reduce road wear while still ensuring a good grip on ice. Therefore, a research project was initiated to gain understanding about the mechanisms and influencing parameters involved in road wear by studded tires. A test method using the institute's internal drum test bench was developed. Furthermore, mechanisms causing road wear by studded tires were derived from basic analytical models. These mechanisms were used to identify the main parameters influencing road wear by studded tires. Using experimental results obtained with the test method developed, the expected influences were verified. Vehicle driving speed and stud mass were found to be major factors influencing road wear. This can be explained by the stud impact as a dominant mechanism. By means of the test method presented, quantified and comparable data for road wear caused by studded tires under controllable conditions can be obtained. The mechanisms allow predicting the influence of tire construction and variable operating conditions on road wear.

Analysis of the Impact of the Frequency Range of the Tensometer Bridge and Projectile Geometry on the Results of Measurements by the Split Hopkinson Pressure Bar Method

2013 ◽  
Vol 20 (4) ◽  
pp. 555-564 ◽  
Author(s):  
Wojciech Moćko
Keyword(s):  
Test Bench ◽  
Split Hopkinson Pressure Bar ◽  
Dynamic Deformation ◽  
Spectral Width ◽  
Hopkinson Pressure Bar ◽  
Computing Environment ◽  
Split Hopkinson ◽  
Pressure Bar ◽  
The Impact ◽  
Bench Model

Abstract The paper presents the results of the analysis of the striker shape impact on the shape of the mechanical elastic wave generated in the Hopkinson bar. The influence of the tensometer amplifier bandwidth on the stress-strain characteristics obtained in this method was analyzed too. For the purposes of analyzing under the computing environment ABAQUS / Explicit the test bench model was created, and then the analysis of the process of dynamic deformation of the specimen with specific mechanical parameters was carried out. Based on those tests, it was found that the geometry of the end of the striker has an effect on the form of the loading wave and the spectral width of the signal of that wave. Reduction of the striker end diameter reduces unwanted oscillations, however, adversely affects the time of strain rate stabilization. It was determined for the assumed test bench configuration that a tensometric measurement system with a bandwidth equal to 50 kHz is sufficient

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