Evaluation of Torsional Vibration Characteristics of Ship Propeller-Engine Shaft System Based on Theoretical Sensitivity Analysis

Design sensitivity analysis of natural frequency for geared shaft systems is of practical importance in the optimal design of these systems. This note provides a simple and easily implemented method to calculate the eigenvalue derivatives of a geared shaft system with respect to a design parameter ν, including gear inertia J, shaft stiffness K, and transmission ratio Q, when the eigensolution is known. An example is given to illustrate the method.

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Torsional Vibration Characteristics of Marine Propulsion Shaft System using Dynamics Limit Function and Delta Bypass Tuning

Transactions of the Korean Society for Noise and Vibration Engineering ◽

10.5050/ksnve.2017.27.6.677 ◽

2017 ◽

Vol 27 (6) ◽

pp. 677-683

Author(s):

Hoangnam Truong ◽

Jinhyoung Kim ◽

Donchool Lee

Keyword(s):

Torsional Vibration ◽

Vibration Characteristics ◽

Limit Function ◽

Shaft System ◽

Marine Propulsion

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Sensitivity Analysis of 1000MW USC Units Shafting Torsional Vibration Based on ANSYS

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.226-228.162 ◽

2012 ◽

Vol 226-228 ◽

pp. 162-165

Author(s):

Shi Liu ◽

Cong Wang ◽

Bing Li ◽

Chang Chen ◽

Dan Mei Xie

Keyword(s):

Sensitivity Analysis ◽

Natural Frequency ◽

Torsional Vibration ◽

Structural Parameters ◽

Vibration Characteristics ◽

Moment Of Inertia ◽

Safe Operation ◽

Important Significance

To calculate a shaftings natural frequency of torsional vibration is one of the most important tasks in turbo-generators design, manufacture and frequency adjusting process. The sensitivity analysis of shafting structural parameters impact on the torsional vibration characteristics has important significance in reducing the amplitude of torsional vibration and ensuring the turbo-generators safe operation. In this paper, a 1000MW USC unit was taken as a research object to analyze the shaftings sensitivity to moment of inertia.

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Characteristic Study of Torsional Vibration on a Full Size Turbine-Generator Unit

13th Biennial Conference on Mechanical Vibration and Noise: Rotating Machinery and Vehicle Dynamics ◽

10.1115/detc1991-0262 ◽

1991 ◽

Author(s):

Huang Xiuzhu ◽

Zhang Xueyan ◽

Sun Daixia ◽

Gong Qing

Keyword(s):

Torsional Vibration ◽

Vibration Characteristics ◽

Turbine Generator ◽

Full Size ◽

Torsional Response ◽

Shaft System ◽

Switch Operation ◽

Shaft Torque ◽

Generator Unit

Abstract Taking a 200MW turbine-generator unit and its connected transsmision network as a study object, torsional vibration characteristics of the shaft system caused by faulty synchronization, different disturbances in the network and switch operation were analysed and calculated. The effect of intensive excitation and “fast valve closing” on the torsional response is also discussed. It is concluded that large mechanical torque of shaft system would be encountered if there is a 3-phase fault in the network, and the shaft torque would be reduced to a certain extent by giving the “fast valve closing” if the network experience a fault.

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Study on vibration characteristics of the shaft system for a dredging pump based on FEM

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/15/4/042002 ◽

2012 ◽

Vol 15 (4) ◽

pp. 042002

Author(s):

L M Zhai ◽

L Qin ◽

C Y Liu ◽

X Liu ◽

L Y He ◽

...

Keyword(s):

Vibration Characteristics ◽

Shaft System

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Analysis and enhancement of torsional vibration stopbands in a periodic shaft system

Journal of Physics D Applied Physics ◽

10.1088/0022-3727/46/14/145306 ◽

2013 ◽

Vol 46 (14) ◽

pp. 145306 ◽

Cited By ~ 12

Author(s):

Yubao Song ◽

Jihong Wen ◽

Dianlong Yu ◽

Xisen Wen

Keyword(s):

Torsional Vibration ◽

Shaft System

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Analysis of Models for Torsional Vibration of Shaft System With Planetary Gearing

Volume 1B: 16th Biennial Conference on Mechanical Vibration and Noise ◽

10.1115/detc97/vib-4036 ◽

1997 ◽

Author(s):

Jinghui Sun ◽

Lee Liu ◽

William N. Patten

Keyword(s):

Torsional Vibration ◽

Planetary Gear ◽

Gear Train ◽

Mathematical Treatment ◽

Dynamic Parameters ◽

Mass Model ◽

Planar Model ◽

Shaft System ◽

Effective Dynamic ◽

Single Mass

Abstract The kinematics of planetary gearing are complex; thus, making it difficult to build an effective dynamic model. In this paper, a single-mass model of a planetary gear and shaft system is developed to study the torsional vibration of the mechanism. Two new models of the system are proposed: (a) a fictitious co-planar model and (b) an equivalent shaft model. The results from the calculations and analyses using these models indicate that: 1) the single-mass model and the general rotary model are both limited, either mathematically or geometrically; 2) the fictitious co-planar model includes all of the geometric and dynamic parameters of the general rotary model, and it can be connected with the shaft system easily; and 3) using a mathematical treatment, the equivalent shaft model is demonstrated to be the most useful and most effective model for the calculation of torsional vibration of a shaft and planetary gear train.

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