振动噪声分析与数值模拟研究.doc

罗茨鼓风机的振动噪声分析与数值模拟研究 STUDY ON NUMERICAL SIMULATION AND VIBRO-ACOUSTICS ANALYSIS OF ROOTS BLOWER A Dissertation submitted in fulfillment of the requirements of the degree of MASTER OF PHILOSOPHY from Shandong University of Science and Technology by He Jingyu Supervisor: Professor Wang Fumao College of Mechanical and Electronic Engineering May 2010  声 明 本人呈交给山东科技大学的这篇硕士学位论文，除了所列参考文献和世所公认的文献外，全部是本人在导师指导下的研究成果。该论文资料尚没有呈交于其它任何学术机关作鉴定。 硕士生签名： 日 期： AFFIRMATION I declare that this dissertation, submitted in fulfillment of the requirements for the award of Master of Philosophy in Shandong University of Science and Technology, is wholly my own work unless referenced of acknowledge. The document has not been submitted for qualification at any other academic institute. Signature: Date:  摘 要 机械系统的动态特性分析与结构噪声的数值模拟是振动与噪声控制领域的一个重要的研究方向。本文课题以山东省自然科学基金资助项目（Y2006F38）罗茨鼓风机噪声振动源识别与预估模型研究Abstract Dynamic analysis of mechanical system and the simulation of structure noise is an important domin of vibration and noise control research. This issue was basised on the foundation of Shandong province natural science (Y2006F38) which is Roots Blower Noise and Vibration Source Identification and the research of prediction model. The engineering research background of this issue is the control of roots blower vibration and noise. The rotor system, shell and whole roots blower were researched and analized about dynamic characteres using dynamic substructure method. Besides, the structural noise of fan shell was predicted and numerical simulated in the method of both the finite element method and boundary element method. This issue was helpful for the theoretical of structural dynamic modification and low noise design of roots blower. The main contents of this issue are as follow