Study Of Dynamic Characteristic Of Underwater Electromagnetic Vibration Table

In this dissertation, based on the analysis of present situation on vibration table at home and abroad, then the dynamic characteristic of moving element of vibration table under coupling status has been studied deeply.In chapter 1, the aim and significance of the research are presented. Firstly, the present research status of standard vibrators at home and abroad is introduced. Then the problems on designing underwater vibrators are pointed out. Finally, the main content of this dissertation is addressed.In chapter 2, the target and technologies of underwater vibrators' design are introduced. Then the general plan of underwater vibrators is put forward.In chapter 3, combining fluid-solid coupling theory and mechanical vibration theory, we get the coupling equation of moving parts and water. The dynamic characteristics of moving parts are studied with theory of finite element, and additional mass of moving parts is found in fluid-solid coupling field, which makes vibrator's natural frequency descend and amplitude-frequency curve downward shift.In chapter 4, the experimental model is designed and produced. By analyzing the experiment data, we can see that the theory analysis proves to be credible.In chapter 5, the structure of moving parts is designed according to the technical requirements. Then the moving parts' dynamic characters are analyzed with theory of finite element, and using the analysis result of fluid-solid coupling theory, we may decide whether the dynamic characters have meted the requirement, if not, modify them again.In chapter 6,all the achievements we accomplished are summarized and the further research, which will be done in the near future, is put forward.