應用多體動力學及離散元素法於具阻尼顆粒齒輪及軸承系統抑振之研究;A Study of Vibration Suppression in a Gear-bearing System with Damping Particles Based on Multi-body Dynamics and Discrete Element Method

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题名:	應用多體動力學及離散元素法於具阻尼顆粒齒輪及軸承系統抑振之研究;A Study of Vibration Suppression in a Gear-bearing System with Damping Particles Based on Multi-body Dynamics and Discrete Element Method
作者:	藍仕成;Lan, Shih-Cheng
贡献者:	機械工程學系
关键词:	齒輪對;阻尼顆粒;多體動力學;離散元素法;MBD;DEM;ADAMS;EDEM;gear pair;damping particles;Multi-body Dynamics;MBD;Discrete Element Method;DEM;ADAMS;EDEM
日期:	2018-08-08
上传时间:	2018-08-31 15:04:15 (UTC+8)
出版者:	國立中央大學
摘要:	建立齒輪系統之多體動力學(Multi-body Dynamics, MBD)模型以研究系統之動載及振動特性一直是工程領域研究的重要議題，近年來，離散元素法(Discrete Element Method, DEM)被廣泛地應用於傳統連體力學無法解決之問題，而利用顆粒間碰撞能量損耗來降低系統之振動便是其中一個研究課題，而至今有關MBD-DEM耦合分析之相關研究甚少。因此，本文將研究具有阻尼顆粒齒輪對之動力特性，除了基於MBD與DEM建立理論數學模型外，更透過ADAMS及EDEM軟體建立具阻尼顆粒齒輪對之CAE雙向耦合分析模型，深入研究齒輪對與封在輪輻孔中顆粒之間的相互影響、及加入顆粒後對齒輪對之抑振效果。最後利用建立之雙向耦合模型分析有無顆粒、固定質量下顆粒半徑大小、顆粒之恢復係數、顆粒之摩擦係數等四種狀況之動態特性，並歸納與整理上述工況改變對輸出軸之移動加速度、齒間受力、振動訊號頻譜與傳動誤差等影響。;To establish the multi-body dynamics (MBD) model of a gear transmission system for studying its dynamic characteristics is always an important issue in the engineering field. In recent years, the discrete element method (DEM) has been widely applied on solving problems that traditional continuum mechanics cannot solve, while the utilization of damping particles to reduce vibration in the mechanical system is one application of them. However, the related research of MBD-DEM coupling analysis is still rare so far. Therefore, this study established the dynamic characteristics of a pair of gears with damping particles. Other than establishing a theoretical mathematical model based on MBD and DEM, a two-way coupling simulation model has been established to study the interaction between the gear pair and particles which are encapsulated in the holes on the gear spokes, and the effect of vibration suppression on the gear pair with particles. At last, we have collated and summarized the effect of different operating conditions on the translation acceleration of gear-shaft mass center, meshing forces between gears and their vibration under time and frequency domain, and transmission error.
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