Study on the Order Analysis of the Vehicle Transmission Torsional Vibration

2011 ◽  
Vol 179-180 ◽  
pp. 289-293
Author(s):  
Bin Zhou ◽  
Zheng Feng Jiang ◽  
Rong Zeng
Keyword(s):  
Torsional Vibration ◽  
Working Condition ◽  
Vibration Test ◽  
Analysis Method ◽  
Test Bed ◽  
Work Process ◽  
Noise And Vibration ◽  
Safety Problem ◽  
Order Analysis

The torsional vibration is a kind of particular vibration form which exists in the work process of the vehicle’s transmission. It is easy to cause the noise and vibration of the vehicles, which will affect the riding comfort and even lead to serious safety problem. On the basis of mechanism analyzing of the torsional vibration, this paper studies on the torsional vibration of the vehicle’s transmission by order analysis method. Through the torsional vibration test under a certain working condition on test bed, the order analysis method is proved to be valid and accurate. So it can provide reference for the design of the transmission and its improvement.

The Analysis and Diagnosis of Vibration Fault of a Certain Type of Aero-Engine

2014 ◽  
Vol 633-634 ◽  
pp. 1256-1262
Author(s):  
Yan Fei Liu ◽  
Qi Wei Wang ◽  
Shu Yun Wang ◽  
Shuang Zhang ◽  
Jia Ming Cao ◽  
...  
Keyword(s):  
Vibration Signal ◽  
Vibration Test ◽  
Analysis Method ◽  
Work Process ◽  
Order Analysis ◽  
Actual Application ◽  
Engine Vibration ◽  
Aero Engine ◽  
Ground Test ◽  
Analysis System

The turbofan double-rotor engine with afterburner, as a certain type of aero-engine, often presents itself with vibration fault problems in the process of trialing run in the ground text and installed the work process of state, which will affect test the factory qualified rate and the flight mission seriously. In this paper, we mainly adopt the order analysis method to find out the reasons of the engine's vibration hazard from its vibration signal, and then make pertinence measures to solve vibration fault problems, which are combined with vibration test and analysis system of the ground text in the process of actual application. The results of the paper analyze the problem of engine vibration fault effectively and reduce the incidence of engine vibration fault, So as to increase the qualified rate of the engine in the ground test.

The Effects Research of Elastic Coupling on Torsional Vibration Test-Bed

2012 ◽  
Vol 229-231 ◽  
pp. 507-511
Author(s):  
Fei Wu ◽  
Huan Liu ◽  
Bing Zeng
Keyword(s):  
Torsional Vibration ◽  
Ride Comfort ◽  
Least Squares Method ◽  
Equivalent Model ◽  
Vibration Test ◽  
Vibration Characteristic ◽  
Vibration System ◽  
Test Bed ◽  
Analysis Software ◽  
Elastic Couplings

The powertrain of vehicle is actually a multi-freedom torsional vibration system, its torsional vibration directly affect the vehicle’ ride comfort and safety. In this paper, the effects of elastic couplings on the newly built torsional vibration test-bed were researched. Firstly, using the basic principle of equivalent conversion, established the torsional vibration equivalent model. Secondly, analyzed the free torsional vibration of the powertrain by the dynamics analysis software-ADAMS and obtained the torsional vibration characteristic of the powertrain with different elastic couplings. Finally，fitted out the curve of stiffness and natural frequency by the least squares method.

Finite element analysis of a vibration test bed frame

2017 ◽  
Vol 59 (2) ◽  
pp. 183-187 ◽  
Author(s):  
Dong Lei ◽  
Rui Jiang ◽  
Pengxiang Bai ◽  
Feipeng Zhu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Vibration Test ◽  
Test Bed ◽  
Element Analysis

INVESTIGATION OF NATURAL FREQUENCIES OF COMPLEX WATER PIPELINES

Akustika ◽  
2021 ◽  
pp. 2-7
Author(s):  
Antonina Sekacheva ◽  
Alexander Noskov ◽  
Lilia Pastukhova
Keyword(s):  
Modal Analysis ◽  
Natural Frequencies ◽  
Residential Buildings ◽  
Geometrical Parameters ◽  
Analysis Method ◽  
Noise And Vibration ◽  
Software Packages ◽  
Resonant Modes ◽  
Water Pipelines ◽  
Ansys Workbench

The article deals with the problem of emergence of noise and vibration from pipelines of multi-storey residential buildings. The determination method of risk of increased noise and vibration using the modal analysis method in the ANSYS Workbench software packages is offered. The numerical modal analysis of straight pipeline sections with various geometrical parameters is carried out. Risk predictions of possible resonant modes are made. The maximum allowed span lengths between supports for sections of pipeline systems with a diameter of 15, 20, 25, 32, 40, 48, 60, 70, 102, 114, 140, 168, 180, 219 mm are offered.

A novel tacholess order analysis method for bearings operating under time-varying speed conditions

Measurement ◽  
2021 ◽  
pp. 110127
Author(s):  
Madhurjya Dev Choudhury ◽  
Liu Hong ◽  
Jaspreet Singh Dhupia
Keyword(s):  
Time Varying ◽  
Analysis Method ◽  
Order Analysis

Research on the Water-Based Hydraulic Vibration Test-Bed

2014 ◽  
Vol 1016 ◽  
pp. 204-208
Author(s):  
Qian Liu ◽  
Yuan Xun Liu ◽  
Cong Yang ◽  
Xiao Lin Li
Keyword(s):  
Test System ◽  
Vibration Test ◽  
Test Bed ◽  
Matlab Software ◽  
Water Based ◽  
Working Principle ◽  
Water Hydraulic ◽  
And Function

In this paper, the application background and function of vibration test is introduced. Besides, the composition and working principle of vibration test system is also introduced simply. Furthermore, the characteristic of water and oil is compared with each other in the paper. It is discussed if the water hydraulic is able to be used in the hydraulic vibration test-bed or not. The capability of hydraulic vibration test-bed based on water is simulated by Matlab software. The feasibility of this project is also analyzed.

Sensitivity Analysis and Application of Natural Frequency of Torsional Vibration of Rotor System

2008 ◽  
Author(s):  
Qing He ◽  
Dongmei Du
Keyword(s):  
Sensitivity Analysis ◽  
Electric Power ◽  
Natural Frequency ◽  
Torsional Vibration ◽  
Natural Frequencies ◽  
Electric Power System ◽  
Rotor System ◽  
Analysis Method ◽  
Turbine Generator ◽  
Sensitivity Analysis Method

The disturbance of electric power system makes large-scale turbine-generator shafts generate torsional vibration. A available method to restrain the torsional vibration of turbine-generator shafts is that all the natural frequencies of torsional vibration of turbine-generator shafts must keep away from the working frequency and its harmonic frequencies as well as all the frequencies that possibly bring on interaction between turbine-generator and electric power system so that the torsional resonation of shafts may not occur. A dynamic design method for natural frequencies of torsional vibration of rotor system based on sensitivity analysis is presented. The sensitivities of natural frequency of torsional vibration to structure parameters of rotor system are obtained by means of the theory of sensitivity. After calculated the torsional vibration dynamic characteristics of original shafts of a torsional vibration stand that simulates the real shafts of 300MW turbine-generator, the dynamic modification for the torsional vibration natural frequency is carried out by the sensitivity analysis method, which makes the first-five natural frequencies of torsional vibration of the stand is very close to the design object. It is proved that the sensitivity analysis method can be used to the dynamic adjustment and optimal design of real shafts of turbine-generator.

scholarly journals What's that Noise?

2011 ◽  
Vol 133 (10) ◽  
pp. 44-45
Author(s):  
Lynn Manning
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Automotive Industry ◽  
Vibration Analysis ◽  
Instrument Panel ◽  
Analysis Method ◽  
Element Analysis ◽  
Noise And Vibration ◽  
To Come ◽  
Testing Company

This article focuses on various features of a finite element analysis (FEA) program designed by IDIADA, a Barcelona-based company providing design, engineering, testing, and homologation services to the automotive industry. The program has been designed as a solution to the problem of squeaks and rattles in an automobile. FEA software used by engineers from automotive testing company IDIADA detects potential automotive noise. The company uses Abaqus Unified Finite Element Analysis from Dassault Systèmes’ brand Simulia. The team delivered a paper at the Simulia Customer Conference in Barcelona in May 2011 to present the latest improvements in their methodology, applied to rattle in a car instrument panel and correlated with real-world testing. Research has shown that a standard noise-and-vibration analysis method alone can’t model, or predict, the contact that will result in a rattle. The engineers need to come up with a simulation that can accommodate both frequency for noise and vibration and contact for squeak and rattle.

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