Improvements for seismometers testing on shake table

This study aims to design fixtures used on the horizontal and vertical shake tables to improve measuring accuracy for the seismometer under test. Based on ANSYS, the model analysis is applied with finite element method. After multiple calculations and calibrations, optimization models are finalized, and then material objects are manufactured basing on the models. It suggests that the fixtures effectively satisfy the high-frequency measurement of seismometer by tight couple between the seismometer and fixture located on the shake table with experimental tests. Also using the dial, accurate azimuth angle is obtained easily. The seismometer is repositioned based on the angle and cross-sensitivity will be got with more accuracy.