摘要:在國內，一些中小企業仍然沿用傳統的設計方法，但是傳統的設計方法已經無 法滿足現代企業的競爭需求。隨著科學技術的發展，在產品設計過程中利用計算機 進行模擬仿真已經逐步成為一種主流的發展方向，但是一些仿真軟件必須在大型計 算機上才能進行模擬仿真，增加了模擬仿真的成本。這大大制約了一些企業，特別 是中小企業的發展。本文結合汽車發動機設計需要，針對傳祺 2.0 發動機的曲柄連 桿機構，在普通計算機上對其進行運動模擬仿真。

論文的主要內容如下： 首先，本文研究了本課題的背景、意義以及機構運動模擬的發展現狀；介紹了本論文的研究內容和組成。 其次，對曲柄連桿機構進行了動力學分析，為后續的運動仿真分析提供理論依據。

　　　再次，基于 Pro/Engineer 軟件，對曲柄連桿機構進行建模仿真，得到曲柄連桿 機構各構件的速度、加速度與受力等信息。

　　　最后，仿真結果分析表明：本論文所采用的運動仿真方法簡單、準確、可行； 能提高曲柄連桿機構設計水平。該方法能滿足中小型企業的要求，縮短產品設計周 期、減少開發成本。

關鍵詞：曲柄連桿機構，運動學，模擬仿真

Abstract:In China, some small and medium-sized enterprises still adhere to the traditional design method, but it has failed to meet the needs of modern enterprise competition. As the development of science and technology, simulate by computer in product design is becoming a mainstream development direction. But some simulation software must run on mainframe computer, which increases the and greatly restricts enterprises, especially small and medium-sized enterprises’ development. Based on the demand of automobile engine design, this paper focuses on the crank rod system of ‘chuanqi’ engine and simulates its movement on micro computer.

The main contents of the papers are as follows:

　　　Firstly, this paper studies background, significance of this research and the development situation of the motion simulation. This paper introduced the research content and composition.

　　　Secondly, this paper analyzes the crank rod system dynamics and provides theory basis for the following simulation analysis of subsequent movement.

　　　Again, based on Pro/E, model and simulate the crank rod system and then obtain velocity, acceleration, and other information of each components of the crank rod system.

　　　Finally, the simulation result shows that the motion simulation methodology is simple, accurate and feasible that can improve the design level of crank rod system. This methodology  can  satisfy  the  requirements  of  small  and  medium-sized  enterprises  to shorten the product design cycle and reduce the cost.

Keyword: Connecting rod, kinematic, emulation