Method of suppressing torsional vibration noise of automobile drive-train system based on discrete wavelet

2020 ◽  
Vol 38 (6) ◽  
pp. 7585-7594
Author(s):  
Weiqing Yu ◽  
Zhichao Huang ◽  
Chengping Zhong ◽  
Juping Liu ◽  
Zhensong Yuan
Keyword(s):  
Torsional Vibration ◽  
Drive Train ◽  
Discrete Wavelet ◽  
Train System ◽  
Vibration Noise

Simulation of Torsional Vibrations or Multibody Simulation: Which Technique Does the Wind Power Industry Need for Solving the Present-Day Problems?

2003 ◽  
Author(s):  
Berthold Schlecht ◽  
Tobias Schulze ◽  
Jens Demtro¨der
Keyword(s):  
Torsional Vibration ◽  
Natural Frequencies ◽  
Wind Load ◽  
Operating Conditions ◽  
Drive Train ◽  
Torsional Vibrations ◽  
Multibody Simulation ◽  
Vibration Behavior ◽  
Drive Trains ◽  
Load Simulation

For the simulation of service loads and of their effect on the whole turbine the wind turbine manufacturers use program systems whose particular strengths lie in the wind load simulation at the rotor, in the rotor dynamics as well as in the control-technological operation of the whole turbine. The complex dynamic behavior of the drive train, consisting of the rotor, the rotor shaft, the main gearbox, the brake, the coupling and the generator, is represented as a two-mass oscillator. This simplification, which certainly is necessary within the framework of the wind load simulation programs, is by no means sufficient for the exact description of the dynamics of the more and more complex drive trains with capacities up to 5 MW. At first, the extension to a multimass torsional vibration model seems to be useful for the exact determination of the torsional vibrations in the drive train. However, in the turbines of all manufacturers there have been found forms of damage on drive train components (high axial loads in bearings, high coupling loads, radial loads on generator bearings) that cannot be explained even on the basis of a torsional vibration analysis. Moreover, in measurements on drive trains natural frequencies in the signals occurred that can no longer be explained by the torsional vibration behavior alone. Consequently, a real multibody simulation becomes necessary, for which also radial and axial vibrations can be taken into account, in addition to torsion, since these influence the torsional vibration behavior considerably. These dependences become already clear in an analysis of natural frequencies. This is illustrated by the example of a 700-kW turbine as well as by a planetary gearing for a 3-MW turbine. Especially in the dimensioning of the off-shore turbines with several MW output power, which are being planned, the use of multibody simulation will be advantageous, since the testing of turbine prototypes of this order of magnitude under the corresponding operating conditions are surely more cost-intensive and risky than the virtual testing with well validated simulation models.

Review on wind turbines with focus on drive train system dynamics

Wind Energy ◽  
2014 ◽  
Vol 18 (4) ◽  
pp. 567-590 ◽  
Author(s):  
S. Struggl ◽  
V. Berbyuk ◽  
H. Johansson
Keyword(s):  
System Dynamics ◽  
Wind Turbines ◽  
Drive Train ◽  
Train System

Structural and torsional vibration and noise analysis of a dry screw compressor

2016 ◽  
Vol 231 (1) ◽  
pp. 4-13 ◽  
Author(s):  
James Willie ◽  
Ronald Sachs
Keyword(s):  
Torsional Vibration ◽  
Noise Analysis ◽  
Measurement Data ◽  
Drive Train ◽  
Gear Train ◽  
Screw Compressor ◽  
Angular Deflection ◽  
Noise Measurements ◽  
Torsional Frequency ◽  
The Right

This paper investigates torsional vibration and pulsating noise in a dry screw compressor. The compressor is designed at Gardner Denver (GD) and is oil-free and use for mounting on highway trucks in the dry bulk industry. They are driven using a power take-off (PTO) transmission and gear box on a truck. Torque peak fluctuations and noise measurements are made and their sources are investigated and reported in this work. To accurately predict the torsional response (frequency and relative angular deflection and torque amplitude), the Holzer method is used. It is shown that the first torsional frequency is manifested as sidebands in the gear train meshing frequencies and this can lead to noise. Using measurement data and curve fitting it is deduced that the pulsating noise is a result of amplitude modulation and not frequency modulation. Sensitivity analysis of the drive train identifies the weakest link in the drive train that limits the first torsional frequency to a low value. Tuning options like increasing the stiffness or inertia of the weakest element and shifting the input speed to the right are presented and discussed. Finally, the effect of higher-order torsional modes on inter-lobe clearance distribution of the rotors is investigated.

System voltage estimation for a decentralized electromotive drive train system

2014 ◽  
Author(s):  
M. Schilling ◽  
U. Schwalbe ◽  
T. Szalai ◽  
T. Heidrich ◽  
F. Endert ◽  
...  
Keyword(s):  
Drive Train ◽  
Train System

scholarly journals Implementation and Analysis of Mathematical Modeled Drive Train System in Type III Wind Turbines Using Computational Fluid Dynamics

2022 ◽  
Vol 16 (1) ◽  
pp. 180-189
Author(s):  
Subash Ranjan Kabat ◽  
Chinmoy Kumar Panigrahi ◽  
Bibhu Prasad Ganthia ◽  
Subrat Kumar Barik ◽  
Byamakesh Nayak
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Wind Turbines ◽  
Drive Train ◽  
Type Iii ◽  
Train System

scholarly journals 202 Friction Properties of Friction Disc in Wind Turbine Drive Train System

2014 ◽  
Vol 2014.22 (0) ◽  
pp. 73-74
Author(s):  
Hidetoshi AOKI ◽  
Yasuhiro NAKA ◽  
Kohei TANAKA
Keyword(s):  
Wind Turbine ◽  
Drive Train ◽  
Friction Disc ◽  
Train System ◽  
Turbine Drive

scholarly journals PERFORMANCE DRIVE TRAIN HYBRID SYSTEM IN GOKART VEHICLES

T R A K SI ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 48
Author(s):  
Prasetyo Dono Saputro
Keyword(s):  
Hybrid System ◽  
Transmission System ◽  
Hybrid Vehicles ◽  
Drive Train ◽  
Main Function ◽  
Hybrid Drive ◽  
Engine Torque ◽  
Variable Transmission ◽  
Ic Engines ◽  
Train System

Drive train (power transfer) is a mechanism that removes the power generated by the engine to drive the wheels of vehicle. Transmission system is one important component in the drive train, whose main function is to channel out of the engine torque to the drive wheel. Transmission system is divided into 3 kinds: manual gear transmission, transmission hydrodinamik, and continuously variable transmission (cvt). And transmission used in ic engines hybrid go-kart is a CVT. In the design of hybrid drive train system on go-kart vehicles produce an analysis of torque, traction, and speed, are able to produce hybrid vehicles go-kart. And obtained τmax = 144,79 (N.m) , τmin = 1,38(N.m), Ftraksi max = 723,94(N), F traksi min = 6,89 (N) , Pmax = 2312,6 watt , Pmin = 74,6 watt, α max = 6,07 (m/s2) , α min = 0,02 (m/s2), on Yamaha AL115S(5TL3) engine, while in DC motor obtained by τmax = 14,25 (N.m) , τmin = 6,72 (N.m), Ftraksi max = 71,27(N), F traksi min = 33,58 (N) , α max = 1,14 (m/s2) , α min = 0,53 (m/s2).

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