本文以兩部引擎具不同配重形式與車架懸吊方式之300cc機車為研究對象，以有限元素法分析於定轉速之假設下，計算兩引擎的搖撼力與搖撼力矩，而後再對其作離散傅立葉轉換後作為振源輸入，並比較兩台機車以不同振源作為輸入搭配不同吊架型式時，對兩車振動行為之影響。由傅立葉分析結果可知，上懸吊引擎之U、V方向力其大小接近；而下懸吊引擎U、V方向力相比則相差甚鉅，其原因為上懸吊引擎曲軸質心位置之改變。
進行影像振動實驗，分別在機車之汽缸頭與車架中間各取一觀測點，以高速攝影機分別拍攝兩機車於怠速狀態下，引擎作為振源輸入時，各觀測點的實際振動軌跡與振動頻率。實驗結果可發現兩車之振動頻率之最大分量約在30Hz附近；而加速規實驗中，可將測量兩點所得之加速度加以積分並得到其位置之振動波型。兩實驗之結果相比在振幅量上大抵相似，皆是汽缸大於車架中間；水平略大於垂直。與模擬位移相比，其趨勢也大致相同。
實車振動除了考慮引擎搖撼力與搖撼力矩外，也必須將機車之模態也作為設計的考量依據

In this thesis, two engines with different forms of weight distribution and different forms of frame suspension in 300cc Motorcycle for the study, finite element analysis on the assumption that given the speed of calculation of two engines shaking force and shaking moment, and then use the discrete Fourier transform them as a local vibration source, compare different vibration sources as input with different types of hangers, the impact on the vibration behavior of the two vehicles. Fourier analysis of the results, the engine of the Upper-hanger, the U and V-direction of the force is close; the engine of the Lower-hanger, the U-direction compared to V-direction has a very huge difference, the reason for the two different is that the centroid position changed.
In Image vibration test, respectively, in the cylinder head of the engine and the middle of frame depicting an observation point, the high-speed camera were shooting two motorcycles at idling state, the vibration source as input, filming the actual trace and calculate the vibration frequency of each observation point. The results can be found that the largest component of the vibration frequency of the two vehicles is about 30Hz; while accelerometer experiment, the measurement can be obtained from the two points and get the vibration acceleration wave of its location. The results of the two experiments are probably similar. in amplitude compared to the Image vibration test, are all the frame in the middle larger than of the cylinder head; horizontal slightly larger than the vertical. Compared with Simulation displacement, the trend is much the same.
The vehicle vibration in addition to considering the shaking force and shaking moment of engine, but also the mode shape of motorcycle must be considered as a basis for design.

[1] Zweiri, Y. H., Whidborne, J. F. & Seneviratne, L. D., “A Mathematical Transient Model for the Dynamics of a Single-cylinder Diesel Engine,” International Conference on SIMULATION, Conference Publication No.457, 1998.
[2] Bali, F. N., Mahzan, S., Ghazali, M. & Wahab, A., “Effect of Body Tilt Angle to the Shaking Forces on the Diesel Engine’s Crankshaft,” Malaysian Technical Universities Conference on Engineering and Technology, 2009.
[3] Wu, C. C., Hwang, Y. W. & Lin, S. H., “Dynamic Analysis and Simulation of Virtual Engine,” Applied Mechanics and Materials Vols.121-126, pp.3770-3778 , 2012.
[4] Karabulut, H. & Ersoy, H. “Dynamic Behaviors of a Two-Cylinder Four-Stroke Internal Combustion Engine,” Gazi University, Technology Faculty, Department of Automotive Engineering, Akdeniz University, Engineering Faculty, Department of Mechanical Engineering.
[5] Dimbale, N. , Bhujbal, A. , Hanabar, R. , Gawande, S. H. , Navale, L.G. & Daphal, G. “Dynamic Vibration Analysis for Multi-Cylinder Diesel Engine of SL90 Type,” Modern Education Society’s College Of Engineering, Pune-411001.
[6] Arakelian, V. H. “Shaking moment cancellation of self-balanced
slider–crank mechanical systems by means of optimum mass redistribution,” Department of Mechanics and Automatics, INSA –Institut National des Sciences Applique´ es.
 
[7] Arakelian, V. & Briot, S. “Simultaneous inertia force/moment balancing and torque compensation of slider-crank mechanisms,” Département de Génie Mécanique et Automatique, Institut National des Sciences Appliquées (I.N.S.A.), Institut de Recherches en Communications et Cybernétique.
[8] 林毓恆，單缸機車引擎搖撼力探討，國立成功大學機械工程學系碩士論文，2011。
[9] 游勝祥，單缸機車引擎定扭力狀態下搖撼力探討，國立成功大學機械工程學系碩士論文，2012。
[10] 朱培銘，機車結構有限元素法模態分析及簡諧分析，國立成功大學機械工程學系碩士論文，2011。
[11] 黃奕翔，以有限元素法分析摩托車吊架型式對振動之影響，國立成功大學機械工程學系碩士論文，2012。
[12] 張培毓，以有限元素法模擬不同引擎吊架型式機車之振動，國立成功大學機械工程學系碩士論文，2013。
[13] 林旻萱，機車引擎搖撼力探討與振動影像實驗，國立成功大學機械工程學系碩士論文，2013。
[14] 黃士豪，以有限元素法模擬機車車架上下懸吊系統之振動，國立成功大學機械工程學系碩士論文，2014。