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，本計畫第一年度將研究具有顆粒阻尼齒輪對之動力特性，除基於MBD與DEM建立理論數學模型外，更透過MSC.ADAMS及EDEM軟體建立具顆粒阻尼齒輪對之CAE雙向耦合分析模型，深入研究齒輪對與顆粒之間的相互影響、及加入顆粒後對齒輪對的抑振效果，此外，亦將建立齒輪對運轉及振動量測試驗平台，用以相互驗證實驗量測結果與CAE模擬結果。再者，考量齒輪系統設計愈趨結構緊湊、高負載及高轉速之應用，故第二年度計畫中，將基於第一年之研究基礎加入滑動軸承之支承考量，藉由建立具滑動軸承及顆粒阻尼齒輪對之理論動力學、CAE及實驗模型，進行相互驗證及比較，以完善整個齒輪-軸承傳動系統，更可藉由轉軸質心軌跡之量測及模擬，研究齒輪系統之運轉平穩性及軸心偏擺。本計畫之研究成果及建立技術，將可提供業界進行產品振動改善之解決方案。 ;To establish the multi-body dynamics (MBD) model of a gear transmission system for studying its dynamic characteristics is always an important issue. 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. However, related research of MBD-DEM coupling analysis is still rare so far. Therefore, in the first-year project, theoretical and CAE models based on MBD, DEM and two-way-coupling technology between ADAMS and EDEM softwares will be established to academically and graphically study particle-to-particle, particle-to-gear and gear-to-gear dynamic behaviors in detail. Moreover, a test platform for measurement of vibration acceleration, axial displacement and transmission error of a gear pair will also be constructed to mutually verify the simulated and experimental results. Based on the first-year basis, for the second year, sliding bearings will be added into the model to make it more complete with considering the design trend that a gear system gradually suffers heavier load with higher speed in a more compact size. The theoretical mathematical, CAE and experimental models for this system will be established to mutually verify results. Additionally, operation steadibility and axial bias of the system can be studied through measurement and simulation of the shaft mass center. Project achievement and developed technologies could be expected to improve vibration in mechanical machines.
