Torsional vibration analysis in turbo-generator shaft due to mal-synchronization fault

International Conference on Recent Advances in Materials, Mechanical and Civil Engineering

材料科学;机械制造;土木建筑工程

Bangunde, Abhishek^1 ; Kumar, Tarun^1 ; Kumar, Rajeev^1 ; Jain, S.C.^1

School of Engineering, Indian Institute of Technology Mandi, HP

175005, India^1

关键词: Duhamel integrals;    Electrical disturbances;    Line-to-ground faults;    Moment variations;    Second-order equation;    Three phase faults;    Torsional vibration;    Torsional vibration analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/330/1/012093/pdf
DOI  :  10.1088/1757-899X/330/1/012093

来源: IOP

【 摘 要 】

A rotor of turbo-generator shafting is many times subjected to torsional vibrations during its lifespan. The reasons behind these vibrations are three-Phase fault, two-phase fault, line to ground fault, faulty-mal synchronization etc. Sometimes these vibrations can cause complete failure of turbo-generator shafting system. To calculate moment variation during these faults on the shafting system vibration analysis is done using Finite Elements Methods to calculate mass and stiffness matrix. The electrical disturbance caused during Mal-synchronization is put on generator section, and corresponding second order equations are solved by using "Duhamel Integral". From the moment variation plots at four sections critically loaded sections are identified.