The Study Of Dynamic Characteristic To Several Chemical Equipments Based On ADINA

This paper mainly focuses on the study of vibration and strength problems of the commonly used chemical equipments such as coke tower、heat exchanger and agitator. So the potential fluid element、three dimensional structure element or shell element are used in the ADINA to do FSI dynamic analysis and comparative analysis of the empirical formula or non FSI analysis.The dynamic performance of the coke tower under the conditions of FSI is special and the fluid has a great impact on it’s natural frequency, which become smaller. And there will appear many low value wave surface modes, which means you have to extract more modes if you want to get it’s structure natural frequency. In case of earthquake, the liquid exacerbates it’s response, a large increase in the stress and displacement. As to the tubes, it’s natural frequency increases a little under the conditions of FSI. And the bigger outside diameter and thickness, the larger it’s first order natural frequency. With it’s fluid density and largest span increase, it’s first order natural frequency decrease, but the effect of the density is not so significant. Under the conditions of multi-tubes, the interaction between them strengthen. For the critical speed of the agitator, the presence of the fluid increase it’s critical speed, and with the density and the installation height of the shaft increase, it’s critical speed decrease. But the influence of the fluid density is small and the installation of the shaft is remarkable.Nowadays, As the design and production process of many existing chemical equipment are almost no consideration of the impact of FSI, so, the research of this paper is very meaningful to the design and application for the future chemical equipments.