Experimental Modal Analysis and Performance Improvement for the Structure of Pidan Gelling Inspecting System

碩士 === 國立中興大學 === 生物產業機電工程學系所 === 99 === In this study, a commercially available software, ANSYS, was used to simulate and compared with original and improved pidan gelling inspecting system. The system is based on vibration theory to determine the gelling of pidan. First of all, creating the model...

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Bibliographic Details
Main Authors: Kai-Ting Liang, 梁凱婷
Other Authors: 鄭經偉
Format: Others
Language:zh-TW
Published: 2011
Online Access:http://ndltd.ncl.edu.tw/handle/30712511586981726111
Description
Summary:碩士 === 國立中興大學 === 生物產業機電工程學系所 === 99 === In this study, a commercially available software, ANSYS, was used to simulate and compared with original and improved pidan gelling inspecting system. The system is based on vibration theory to determine the gelling of pidan. First of all, creating the model of system and analyzing the whole system to identify resonance frequencies and mode shapes, and the unstable and volatile of the structure would be found as well as the structural stiffness was enhanced through comparing with the original and improved system. Secondly, the simulation of the system was added in isolation equipment. The system’s vibration transmission was determined using the displacement which was calculated from the transient as applied an impulse. When the iron blocks were added on the structure, the displacement would be reduced up to 86%. Furthermore, the vibration isolate rubbers were added, and the displacement would be reduced up to 80%. In addition, using the harmonic response analysis, the frequency was calculated from the improved system, distributed mainly within 20~40Hz, which would avoid the frequency of pidan inspecting state (47~78Hz), thus the interference of the signal measurements was reduced. In summary, the system performance was enhanced.