Introduction of the Multi-Axial Seismic Test System

Introduction of the Multi-Axial Seismic Test System

The multi-axial seismic test system (MAST) in the NCREE Tainan Laboratory is designed for conducting dynamic tests on non-structural components, such as supporting structural elements or critical components of offshore wind turbines. The MAST system consists of a hydraulic-powered 6-DOF shaking table, controller, and data acquisition unit. The table motion is able to reproduce the floor responses of the location of the equipment. The table size of the MAST system is 2.2 by 2.2 m, and the payload has a maximum of 3,500 kg. The 6 actuators of the MAST system are arranged using the Stewart platform-based layout, and the max strokes of the X, Y, and Z axes are 240, 217, and 200 mm, respectively. The peak velocities of the horizontal and vertical axes are 2 and 1.65 m/s, respectively. With a fully loaded specimen, the peak accelerations of the horizontal and vertical axes are 5.5 g and 14 g. The optimum working frequency of the MAST system is from 0.1 to 60 Hz. Considering these outstanding specifications, the MAST system is compatible with GR-63-CORE or other seismic test regulations for nonstructural components. The system has already been assembled and tested, and it will be available soon.