Study on the lateral and torsional vibration of single rotor-system using an integrated multi-body dynamics and finite element analysis

Abdelrahman I A Eisa,Li Shusen,Wasim M K Helal

doi:10.1177/1687814020968336

Abdelrahman I A Eisa, Li Shusen + Show 1 more

Open Access

https://doi.org/10.1177/1687814020968336

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Abstract

Due to rapid development in the industry, operating speeds and eccentricity produced undesirable vibrations which may lead to damage in bearings, seals, and lubrication systems. In the proposed paper, a novel analytical method was presented using an integrated multi-body dynamics and finite element analysis to simulate the lateral and torsional vibration. This method was applied to a proposed model of single rotor-system. In order to study the lateral and torsional vibration of the system profoundly, three markers were placed on the locations of the left and right bearings and the mass center of the shaft. The effects of bearing force caused by lateral and torsional vibrations were also analyzed. The results showed that the lateral vibration has a great effect on the dynamic of single rotor-system when lowering motor speed. It was found that, as motor speed increased, the motion of the system becomes more stable with steady fluctuates of the displacement response. The calculated natural frequency of SRS is compared with theoretical results to verify the transient solver. This novel method is practical in analyzing the lateral and torsional vibration of the SRS under various speeds and eccentricities.

Highlights

Due to the rapid development in industry, rotorbearing systems such as motors, jet engines, pumps, turbines, and auto engines usually subject to high speed in order to achieve a high productivity request
The simulation parameters of single rotor-system (SRS) supported by single row deep groove ball bearing are given as; material density of shaft is 7801 kg/m3, elastic modulus is 207 GPa, Poisson’s ratio is 0.29, the mass of shaft is 2.757 kg, the mass of disk is 3.5 kg, the eccentricity is taken as 0.1, 0.2, 0.3 mm, four motor speed of 1000, 3000, 6000, 9000 rpm are taken to excite the SRS
The SRS supported by single row deep groove ball bearing and excited by DC motor was established using Automatic Dynamic Analysis of Mechanical Systems (ADAMS) software

Summary

Introduction

Due to the rapid development in industry, rotorbearing systems such as motors, jet engines, pumps, turbines, and auto engines usually subject to high speed in order to achieve a high productivity request. Hsieh[20] developed rotor-bearing system model for analyzing coupled lateral-torsional vibration with applied external torque based on transfer matrix method. This proposed method can deeply simulate and analyze the lateral and torsional vibration as well as the other vibration characteristics of the SRS under different rotational speeds and eccentricities.

Results

Conclusion