| Summary: | 碩士 === 國立成功大學 === 土木工程學系碩博士班 === 91 === Two-kinds of fluid dampers with different type of orifices were tested in this project. One type of the orifice is determined by the gape in-between the piston and the inner size of the cylinder (Type A), and the other is determined by the drilled holes on the piston (Type B). Both of cyclic dynamic test and drop hammer test are used to detect the physical properties of the fluid dampers. Furthermore, the relationship between these two kinds of test are compared and functionalized. Consequently, the feasibility of drop hammer test is recognized on the purpose of investigating the property of fluid dampers.
By analyzing the test data, two conclusions are given as follows:
1.For most of the velocity exponent of damping function for type A fluid dampers are equal to or less than one; while that for type B fluid dampers are greater than one.
2.According to the experimental results of drop hammer test and cyclic test, it is found that drop hammer test can really help us to find part of properties of fluid dampers. Because of easy to great amount of energy which we need to induce high velocity actions, drop hammer test could be able to help us to find the physical properties of fluid dampers and meet the requirements of the design projects.
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