Study on torsional vibration of the crankshaft system with variable inertia based on dynamics of multi-body systems

2011 ◽  
Author(s):  
Gao Haopeng ◽  
Huang Yingyun ◽  
Tian Xuebing ◽  
Tian Huaan
Keyword(s):  
Torsional Vibration ◽  
Multi Body

Multi-Body Dynamic Analysis of Driveline Torsional Vibration for an RWD Vehicle

2014 ◽  
Author(s):  
Yuan feng Xia ◽  
Jian Pang ◽  
Chengtai Hu ◽  
Cui Zhou ◽  
Cong Wu
Keyword(s):  
Dynamic Analysis ◽  
Torsional Vibration ◽  
Multi Body ◽  
Body Dynamic

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

2020 ◽  
Vol 12 (10) ◽  
pp. 168781402096833
Author(s):  
Abdelrahman I A Eisa ◽  
Li Shusen ◽  
Wasim M K Helal
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Torsional Vibration ◽  
Rapid Development ◽  
Rotor System ◽  
Motor Speed ◽  
Element Analysis ◽  
Body Dynamics ◽  
Bearing Force ◽  
Multi Body

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.

Study the Effect of Torsional Vibration on Valvetrain Dynamic in a Heavy Duty Diesel Engine Using Multi-Body Dynamic

2009 ◽  
Author(s):  
Mehdi Mehrgou
Keyword(s):  
Diesel Engines ◽  
Torsional Vibration ◽  
Internal Combustion Engines ◽  
Precise Determination ◽  
Gear Train ◽  
Valve Train ◽  
Heavy Duty ◽  
Heavy Duty Diesel ◽  
Multi Body ◽  
Body Dynamic

Today, due to technical, commercial and environmental requirements, internal combustion engines especially heavy duty diesel engines must operate with high cylinder pressures and the components must be optimized for the best performance. Heavy duty diesel engines usually rotate the driven machinery with a large inertia such as generators, or ship propeller. A crankshaft is subjected to periodic dynamic loads; also other inconsistencies could make misfire in engine and because of the torsional vibration in engine, the crankshaft has fluctuating instantaneous speed. Due to the essence of this type of the engine which has heavy parts, beside the robust design of them, and relatively high torques which need to rotate the camshaft, these engines valvetrain normally drive with gears. In consequence the rotating speed of engine crankshaft completely transfer to the camshaft because of high amount of crank train’s inertia in comparison with the valve train and in some cases using the damper for camshaft is required. Modern calculation methods allow for the precise determination of system dynamic and loads. Thus, it is possible to consider design margins that ensure sufficient reliability to avoid undesired dynamic behavior which could lead to structural failures, besides avoiding the components over sizing. In this paper ADAMS\Engine commercial software has been used for simulating the coupled engine cranktrain and valve train subsystems of an engine under development. The engine complete dynamic simulation with Multi-Body Dynamic tool including backlash in gear train and torsionally flexible camshaft, prepare a good model for study the effect of engine cranktrain dynamics on its valvetrain.

Analysis of Torsional Vibration of Large-Scale Ship Propulsion Shafting

2015 ◽  
Author(s):  
Weizhong Tan ◽  
Cong Zhang ◽  
Zhe Tian ◽  
Xinping Yan
Keyword(s):  
Torsional Vibration ◽  
Large Scale ◽  
Ship Hull ◽  
Dynamic Coupling ◽  
The Real ◽  
Ship Propulsion ◽  
Torsion Vibration ◽  
Simulation Results ◽  
Multi Body ◽  
Body Dynamic

This paper is based on the multi-body dynamic coupling theory and finite element theory. A multi-body dynamic coupling model of the large-scale vessel is built and the torsion vibration characteristics of slow-speed ship propulsion shafting are analyzed. The measurements of shafting torsional vibration in the real ship are compared with the results from the simulation model. Then, the differences between measurements and simulation results are analyzed in multi-orders. The analysis result indicates that the simulation results are almost the same with measurements obtained from the real ship, which verify the correctness and feasibility of the model. At the same time, the influence of ship hull deformation on the torsion vibration of ship propulsion shafting is discussed by Adams/Vibration. The analysis shows that the ship hull deformation could cause the significant increase of torsional vibration of ship propulsion shafting.

Sign in / Sign up

Export Citation Format

Share Document