effect of bearing preloads on the modal

XANSYS ~ View topic

2009-8-17 static analysis so that i can move on in performing a modal analysis and show how the tightness of the bolt can effect the modal frequency The geometry description is below: i've 3 plates each 100mm OD 70mm ID and lengths are 8mm 50mm and 30mm respectively which are named frontcap lamination and rearcap respectively

Damping in a rolling bearing arrangement

2020-8-14An experimental modal analysis verifies that the bearing arrangements represent the highest compliance in the system All other parts (housing shaft preloading device etc ) behave as almost rigid bodies within the frequency range of interest generating practically no additional structural damping

Rolling

2016-12-10For the past several decades significant efforts have been devoted to modeling and analysis of rolling-element bearings to aid in their design and application This paper reviewed the modeling and analysis of rolling-element bearings with emphasis on single-row ball and roller bearings The application of bearing models was reviewed as well along with illustrative results

Study on the Relation of Wheel Hub Bearing Preload

Preloads have an important influence on working performance and service life of wheel hub bearing In order to study the action mechanism carrying out the study on the effect of wheel hub bearing preload on the natural frequency is particularly important Aiming at a certain type of car wheel hub bearing the wheel hub bearing swept-sine vibration test system is built and the conclusion is

Effect of bearing preload on the dynamic characteristics

2017-6-2Effect of bearing preload on the dynamic characteristics of the spindle-bearing system Gaofeng Hu1 a * Ye Chen1 b Weiguo Gao1 c and Dawei Zhang1 d 1Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education Tianjin University Tianjin 300072 China a gaofenghutju edu cn b chenyetju edu cn c gaowgtju edu cn d medzhangtju edu cn

Inverse identification of the mechanical parameters of

Abstract To create a dynamic model of a pipeline system effectively and analyze its vibration characteristics the mechanical characteristic parameters of the pipeline hoop such as support stiffness and damping under dynamic load must be obtained

Study of the Stiffness Matrix of Preloaded Duplex

Three bearing configurations (face-to-face back-to-back and tandem arrangements) and two preload mechanisms (constant pressure preload and fixed position preload) are included in the proposed model Subsequently the five-dimensional stiffness matrix of the preloaded duplex angular contact ball bearing is derived analytically

Rotordynamic Analysis of Bolted Disk

2020-2-13the number of bolts under the condition of with and without bolted joints the modal analysis is carried out to study the effect of bolted joints on modal frequencies of the disk-drum rotor bearing system These responses are validated analytically using MATLAB Also to study the effect of bolted joints on critical speeds the Campbell

Analysis of bearing stiffness variations contact forces

Abstract A method is presented for calculating and analyzing the quasi-static load distribution and varying stiffness of a radially loaded double row bearing with a raceway defect of varying depth length and surface roughness The method is applied to ball bearings on gearbox and fan test rigs seeded with line or extended outer raceway defects When balls pass through the defect and lose all

CN102564763B

The invention discloses a dynamic pre-tightening force measurement method of a main shaft bearing of a machine tool The dynamic pre-tightening force measurement method comprises the following steps of: firstly carrying out load analysis on a main shaft support bearing and calculating a load borne by the main shaft bearing secondly establishing a five-degree-of-freedom nonlinear finite

Inverse identification of the mechanical parameters of a

2019-7-24Inverse identification of the mechanical parameters of a pipeline hoop and analysis of the effect of preload Ye GAO 1 2 Wei SUN 1 2 1 School of Mechanical Engineering and Automation Northeastern University Shenyang 110819 China 2

Effects of Bearing Configuration on Spindle Dynamic

This article investigates the effects of bearing configuration on the spindle dynamic characteristics First an analytical model of spindle is proposed and the bearing sets radial stiffness is calculated Second the spindle analytical model is developed to perform modal analysis and harmonic response analysis with ANSYS and then obtain the natural frequency and FRF under different bearing

Pre stressed modal FE Analysis of bolted joint

2018-1-293 4 2 Results of above static structural module are inputted to pre stressed modal analysis module to get frequencies for mode shapes 3 4 3Same procedure is followed for analysis by applying preload of 500 1000N 3 5 Solution Results Graphs according to variation of frequency Mode shapes for each frequency can be obtained in modal

GEARBOX NOISE AND VIBRATION INFLUENCE OF

2009-1-27The influence of bearing preload or endplay on gearbox noise and vibrations was investigated using a test gearbox consisting of a heli-cal gear pair shafts tapered roller bearings and housing Vibration measurements were carried out at 140 Nm and 400 Nm torque with 0 15 mm and 0 mm bearing endplay and 0 15 mm bearing preload

Analysis of bearing stiffness variations contact forces

Abstract A method is presented for calculating and analyzing the quasi-static load distribution and varying stiffness of a radially loaded double row bearing with a raceway defect of varying depth length and surface roughness The method is applied to ball bearings on gearbox and fan test rigs seeded with line or extended outer raceway defects When balls pass through the defect and lose all

Rotordynamic Analysis of Bolted Disk

2020-2-13the number of bolts under the condition of with and without bolted joints the modal analysis is carried out to study the effect of bolted joints on modal frequencies of the disk-drum rotor bearing system These responses are validated analytically using MATLAB Also to study the effect of bolted joints on critical speeds the Campbell

Inverse identification of the mechanical parameters of a

2019-7-24Inverse identification of the mechanical parameters of a pipeline hoop and analysis of the effect of preload Ye GAO 1 2 Wei SUN 1 2 1 School of Mechanical Engineering and Automation Northeastern University Shenyang 110819 China 2

US9442040B2

A device for determining a bearing preload of a rolling-element bearing includes an exciter configured to be attachable to a component of the rolling-element bearing and to excite the component of the rolling-element bearing and cause it to vibrate when the rolling-element bearing is not rotating at least one vibration sensor configured to be attachable to the component or to a further

Machines

The study showed that waviness amplitude has the highest effect in the instability regions compared to initial phase of waviness unbalance and bearing preloads Sopanen and Mikkola [12 13] modeled a deep-groove ball bearing which included the effect of surface waviness amongst other defects on the inner and outer races The second part of

Damping in a rolling bearing arrangement

2020-8-19An experimental modal analysis verifies that the bearing arrangements represent the highest compliance in the system All other parts (housing shaft preloading device etc ) behave as almost rigid bodies within the frequency range of interest generating practically no additional structural damping

Oversampled Modal Approach of a Turbocharger Rotor

2019-12-30ral frequency of a gas turbine rotor increases with rod preloads because the stiffness changes 14 These preloads have a signif-icant effect on the deflections and stresses which modifies the modal analysis 15 H Taplak and M Parlak made a dynami-cal analysis of a gas turbine rotor using the Dynrot program

Effects of Preloads on Vibration Transmission Through

In particular the effects of bearing preloads on dynamic characteristics of double row angular contact ball bearings are first numerically explored The dynamic responses of face-to-face back-to-back and tandem arrangements are evaluated on a comparative basis under various preloads

Analysis and Bearing

2019-2-22In the original design of the Kaybob rotor the bearing span was 59 688 inches A modal analysis of the rotor indicated that the shaft first critical speed modal stiffness was approximately 115 000 lb/in This fundamental shaft modal stiffness is extremely important for the proper tuning of

The influence of bearing stiffness on the vibration

2017-5-19analysis [10] Later an indirect approach to de ne the bearing sti ness was conducted [11] as well as an investigation of the time-varying rolling-element characteristics [12] and the e ect of bearing preloads on the modal characteristics of a shaft-bearing assembly [13]

Effect of bearing preloads on the modal

2012-8-1This article investigates the role of bearing preloads on the modal characteristics of a shaft-bearing assembly with a double row angular contact ball bearing First an analytical model is developed to comparatively evaluate the effects of axial bearing preloads on the vibratory responses of alternate double row configurations The analytical model includes bearings via a five dimensional