摘 要

虛擬樣機(jī)技術(shù)的研究范圍主要是機(jī)械系統(tǒng)的運(yùn)動學(xué)和動力學(xué)分析，其核心是利用計算機(jī)輔助分析技術(shù)進(jìn)行機(jī)械系統(tǒng)的運(yùn)動學(xué)和動力學(xué)分析，以確定系統(tǒng)及其各構(gòu)件在任意時刻的位置、速度和加速度。隨著摩托車工業(yè)的發(fā)展，市場競爭日益激烈，對摩托車的乘坐舒適性與平順性等方面提出了越來越高的要求。在設(shè)計階段對摩托車進(jìn)行振動性能評估，可以對摩托車的設(shè)計起到指導(dǎo)性的作用。
本論文基于多體動力學(xué)理論，結(jié)合應(yīng)用ADAMS軟件，針對摩托車的振動建立了摩托車虛擬樣機(jī)模型。由于發(fā)動機(jī)慣性激振力的作用對摩托車振動性能產(chǎn)生重要的影響。利用ADAMS對虛擬樣機(jī)進(jìn)行了振動分析，分別測出車頭、腳蹬、車尾在不同轉(zhuǎn)速的加速度。運(yùn)用虛擬樣機(jī)技術(shù)開發(fā)摩托車產(chǎn)品是借鑒、消化、吸收國外先進(jìn)技術(shù)，增強(qiáng)我國摩托車企業(yè)自主開發(fā)和技術(shù)創(chuàng)新能量的有效途徑。利用虛擬樣機(jī)技術(shù)，在摩托車產(chǎn)品設(shè)計階段對其運(yùn)動學(xué)、動力學(xué)、強(qiáng)度、剛度、振動特性進(jìn)行仿真，可以實(shí)現(xiàn)產(chǎn)品的總體性能匹配和整體優(yōu)化。因此，摩托車虛擬樣機(jī)技術(shù)的研究，對于縮短產(chǎn)品開發(fā)周期，降低成本，改進(jìn)設(shè)計質(zhì)量，提高市場競爭力有著重要的理論意義和現(xiàn)實(shí)意義。


關(guān)鍵詞：發(fā)動機(jī)，有限元分析，ADAMS模型，摩托車虛擬樣機(jī)








ABSTRACT

The study scope of the virtual Prototyping technique is mainly kinematics and dynamics analysis of mechanical system, whose core is to analyze kinematics and dynamics of mechanical system with computer-aided analysis technique, in order to determine the position, velocity and acceleration of system and its components in any moment. With the development of the motorcycle industry, market competition becomes more severe, the demands of comfort and calmness of the motorcycle are also increasingly higher. Performance eva luation of motorcycle vibration at the design stage can play a guide role in the design of motorcycle.
The article bases on the multi-body dynamics theory and combines with the ADAMS software for the establishment of motorcycle virtual prototype model aiming at the vibration of the motorcycle. As the inertia exciting force of the engine has an important impact on vibration performance of motorcycles. The accelerations of the front, pedal and the rear at different rotate speed are measured by analyzing the vibration of the virtual prototype with ADAMS. It is to refer, digest and absorb foreign advanced technology, also is an effective way to enhance independent development of China's motorcycle enterprises and technological innovation. By virtual prototyping technology, the overall performance and overall optimization of the product can come true, whose characteristics of kinematics, dynamics, strength, stiffness and vibration are simulated in the motorcycle product design stage of motorcycle product. Therefore, the research of the motorcycle virtual prototyping technology plays an important theoretical and practical role in shortening the product development cycle, reducing costs as well as improving design quality and the market competitiveness.


Key word：Engine, finite element analysis, ADAMS model, the virtual prototype of motorcycle



目錄
摘 要 I
ABSTRACT II
目錄 III

1 緒 論 1
1.1 課題研究背景 1
1.2 國內(nèi)外研究現(xiàn)狀 3
1.3論文研究的目的和意義 5
1.4 論文的主要研究內(nèi)容 5

2 虛擬樣機(jī)技術(shù)及ADAMS軟件的介紹 7
2.1 虛擬樣機(jī)技術(shù)簡介 7
2.2 虛擬樣機(jī)技術(shù)的內(nèi)容 7
2.3 虛擬樣機(jī)技術(shù)的應(yīng)用 8
2.4 虛擬樣機(jī)技術(shù)的實(shí)現(xiàn) 9
2.5 ADAMS軟件簡介 9
2.5.1 ADAMS軟件概述 9
2.5.2 ADAMS/View簡介 10

3 摩托車虛擬樣機(jī)模型構(gòu)建 13
3.1 摩托車虛擬樣機(jī)的特點(diǎn) 13
3.2 摩托車虛擬樣機(jī)開發(fā)流程 13
3.3 摩托車車架模態(tài)分析 15
3.3.1車架結(jié)構(gòu)及特點(diǎn) 15
3.3.2 摩托車車架結(jié)構(gòu)簡化原則 16
3.3.3車架有限元模型構(gòu)建 17
3.4發(fā)動機(jī)慣性激振力計算模型 19

4 摩托車整車動態(tài)響應(yīng)分析 22
4.1 幾何模型與裝配 22
4.2 幾何模型建立 24
4.3 摩托車整車模型 26
4.4 發(fā)動機(jī)慣性激振力對摩托車的振動響應(yīng) 27
4.4.1 力的大小計算公式 27
4.4.2 振動響應(yīng)測試 28

5 結(jié) 論 37

致 謝 38
參考文獻(xiàn) 39