Effect of particle damping on high-power gear transmission with dynamic coupling for continuum and non-continuum

2021 ◽  
Vol 173 ◽  
pp. 107724
Author(s):  
Wangqiang Xiao ◽  
Zhanhao Xu ◽  
Fengbo Zhang ◽  
Yuanyi Luo ◽  
Sheng Wang ◽  
...  
Keyword(s):  
High Power ◽  
Gear Transmission ◽  
Dynamic Coupling ◽  
Particle Damping

scholarly journals Research on Vibration Reduction Characteristics of Continuum and Noncontinuum System on Coupling for High-Power Gear Transmission Based on Particle Damping Materials

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Wangqiang Xiao ◽  
Zhanhao Xu ◽  
Sheng Wang ◽  
Shaowei Yu ◽  
Kai Qin ◽  
...  
Keyword(s):  
High Power ◽  
Vibration Reduction ◽  
Transmission Error ◽  
Gear Transmission ◽  
Analysis Model ◽  
Filling Rate ◽  
Element Analysis ◽  
Displacement Mapping ◽  
Reduction Effect ◽  
Damping Materials

High-power gears are widely used in various engineering fields. The gear transmission system is an extremely complex elastic system, which produces complex vibration under internal and external excitation. For the vibration and noise problems caused by transmission error, a discrete element and finite coupling method based on the particle filling rate is proposed. Firstly, the gear dynamic model was established, and the particle damper was installed in the gear to reduce the vibration of the gear. Secondly, through the coupling process, the contact force and contact position between the noncontinuous medium and the continuous medium were correctly transferred to the corresponding nodes of the finite element analysis model. Then, the equivalent displacement mapping of the contact loads’ node of the gear was realized, and the transformation of the local coordinate to the global coordinate was carried out. Finally, by combining theoretical analysis with experimental verification, the influence of the filling rate of damping particles on the vibration reduction effect of the gearbox under different working conditions was studied. The 2 mm tungsten particles were selected, and the particle damper had the best damping effect when the filling rate was 88%.

High power density design for planetary gear transmission system

2019 ◽  
Vol 233 (16) ◽  
pp. 5647-5658 ◽  
Author(s):  
Cheng Wang
Keyword(s):  
Power Density ◽  
High Power ◽  
Power Loss ◽  
Target Function ◽  
Planetary Gear ◽  
Transmission System ◽  
Gear Transmission ◽  
Combination Method ◽  
High Power Density ◽  
Gear Transmission System

Planetary gear transmission system has been widely used in the field of aerospace equipment, automobiles, ships, etc. High power density design is an important development direction for transmission machinery, but there is a lack of systematic and deepening research in planetary gear transmission system field. Taken the most widely used 2K–H-type planetary gear transmission system as research object, a design method of high power density considering volume and efficiency is put forward. First, the transmission efficiency model of 2K–H-type planetary gear transmission system is built on the basis of calculation of single gear pair meshing efficiency instead of the look-up table method. Second, the volume model of 2K–H-type planetary gear transmission system is built according to the structure of gear. Finally, the smallest volume and the minimum power loss of 2K–H-type planetary gear transmission system are the target of optimization, and the linear-weighted combination method is used to construct target function. Taken a 2K–H-type planetary gear reducer in some machine tool as an example, the optimization is carried out. The results show that the power loss of optimized system is reduced by 11.42%, and the volume of system is reduced by 25.2%.

scholarly journals Effect of Particle Material, Size and Filling Percentage on Particle Damping Phenomenon for Gear Transmission System

2021 ◽  
Vol 9 (VI) ◽  
pp. 3740-3753
Author(s):  
Shivraj R. Kumbhar
Keyword(s):  
Transmission System ◽  
Gear Transmission ◽  
Control Technology ◽  
Present Stage ◽  
Passive Vibration Control ◽  
Damping Effect ◽  
Particle Material ◽  
Gear Transmission System ◽  
Particle Damping ◽  
Simulation Results

Particle damping is a passive vibration control technology. At the present stage, particle damping technology is developing especially in machinery and aerospace fields. For studying the particle damping effect different parameters such as particle material, size and filling percentage is used. One of the applications for particle damping phenomenon is gear transmission system. For simulation of particle damping discrete element method (DEM) software is used. The simulation results have been validated by comparing with experimental results of a physical system. Find damping effect due to particle damping from simulation and experimentation.

Analysis on Dynamic Contact Force in High Power Density Gear Transmission Based on Flexible Model

2013 ◽  
Vol 328 ◽  
pp. 547-551
Author(s):  
Hai Sheng Feng ◽  
Li Qin Wang ◽  
De Zhi Zheng ◽  
Le Gu
Keyword(s):  
Power Density ◽  
Contact Force ◽  
High Power ◽  
Dynamic Contact ◽  
Gear Transmission ◽  
High Power Density ◽  
Normal Contact ◽  
Rigid Model ◽  
Simulation Results ◽  
Flexible Model

Recently, most of researchers pay more attention to the flexible model for solving dynamic contact force in high power density gear transmission. But, the detailed formula of the contact force parameters is not given. Therefore, in this paper the detailed calculation of coefficient of restitution (COR) is proposed, which can solve the elastoplastic contact deformation problems compared with other method. To improve the simulation efficiency, a flexible model based on ADAMS and Hertzian theory is presented. According to the simulation results, the normal contact force of the flexible model is much higher than that of the rigid model in plastic contact deformation. Meanwhile, the normal contact force delay exists in flexible model compared with rigid model. At last, the flexible model simulation results are close to the theoretical result in steady state. Consequently, the flexible model can be applied to analyze dynamic characteristic in reasonable time and many revolutions of the high power density gear transmission.

A spatial dynamics model for heavy-haul electric locomotives considering the dynamic coupling effect of gear transmissions

2019 ◽  
Vol 233 (9) ◽  
pp. 961-973 ◽  
Author(s):  
Chunyan He ◽  
Zaigang Chen ◽  
Wanming Zhai ◽  
Jianzheng Jiang ◽  
Kaiyun Wang
Keyword(s):  
Coupling Effect ◽  
Spatial Dynamics ◽  
Gear Transmission ◽  
Dynamic Effects ◽  
Dynamics Modeling ◽  
Dynamics Model ◽  
Dynamic Coupling ◽  
Gear Mesh ◽  
Lateral Vibrations ◽  
Heavy Haul

A locomotive is usually powered by the electromagnetic torque which is transmitted from the traction motor to the wheelset by gear transmission. In order to investigate the dynamic coupling effects from the gear transmission subsystems on the entire locomotive dynamics system, a comprehensive spatial locomotive dynamics model that considers the dynamic coupling effect of the gear transmissions is developed based on the multibody dynamics theory. In this model, the moved Marker technique is employed to calculate the dynamic mesh force of the gear pairs through which more accurate time-varying gear mesh stiffness excitations could be imported, which is the core of this dynamic model. Then, the established locomotive dynamics model is validated by comparing with the experimental test results. Finally, the dynamic effects of the gear transmissions are revealed by comparing with the results from the traditional locomotive dynamics model without considering the dynamic excitations from the gear transmissions. The results indicate that the gear transmissions have negligible effects on the vibrations of the carbody and the bogie frame, and on the lateral vibrations of the motor and the wheelset. However, the gear transmissions have significant effects on the vertical and, in particular, the longitudinal vibrations of the motor and the wheelset. Thus, it is suggested that the dynamic effects of the gear transmissions are considered in the locomotive dynamics modeling, especially when the vibrations of the motors and the wheelsets are taken into account.

scholarly journals Design and Development of Particle Friction and Impact Damping for Spur Gear Drive

2021 ◽  
Vol 9 (VI) ◽  
pp. 649-655
Author(s):  
Nawaj I. Mulla ◽  
Vishal V. Dhende
Keyword(s):  
High Speed ◽  
Spur Gear ◽  
Transmission System ◽  
Gear Transmission ◽  
Particle Collisions ◽  
Dem Simulation ◽  
Vibration Absorption ◽  
Gear Transmission System ◽  
Particle Damping ◽  
Impact Damping

Gear transmission system plays an important role in many of the mechanical systems. Vibration is the major problem and unavoidable in gear transmission system because high speed and heavy loading condition. High temperature and harsh working condition limits the other vibration absorption methods. Particle friction & impact damping is passive method of vibration absorption. Ordinary particle damping method gives the random movement of particles. In this research holes are provided to the gear and put cylindrical impact particles in particular hole gives the friction and impact effect to absorb the vibration. The mathematical analysis is formulated for the system also run MATLAB program and found out plot for displacement v/s time. DEM simulation carried out using EDEM software which is used to perform simulations at different speed and to analyze the energy dissipation during particle collisions and compared the energy absorbed by the particles of different materials for varying speed.

Experiment for Vibration Suppression Based on Particle Damping for Gear Transmission

2014 ◽  
Vol 945-949 ◽  
pp. 703-706 ◽  
Author(s):  
Wang Qiang Xiao ◽  
Wei Li
Keyword(s):  
Design Principle ◽  
Vibration Suppression ◽  
Rotation Speed ◽  
Gear Transmission ◽  
Filling Rate ◽  
Centrifugal Load ◽  
Gear Transmission System ◽  
Particle Damping ◽  
Working Situation ◽  
Gear Engagement

Introducing the particle damping technology into the gear transmission will effectively reduce the vibration during gear engagement, especially suitable for high temperature, oil-lubricating environment for the gear transmission system. In the real working situation, centrifugal load will make the particle at one end away from the rotation center. The vibration suppression of particle damping in the gear transmission is studied through experimental method. The effect of rotation speed and particle filling rate on vibration suppression of particle damping is analyzed in gear transmission. The result will provide exact theory basis and design principle for the vibration suppression of gear transmission.

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