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ANCO 270 GPM 3000 PSI Nine Pump System

ANCO R-020 Biaxial Table

 

Hyundai Heavy Industries (HHI), the world's largest shipbuilder with over 15% of the international market, has contracted with ANCO Engineers for the development, engineering, fabrication and installation of a shake table system for dynamic testing and qualification of equipment weighing in excess of 30,000 lbs. Following ANCO's installation of the 14 ft. x 14 ft. table and associated equipment system at HHI facilities in Ulsan, South Korea, Hyundai will utilize the test system primarily to support Hyundai's ship and railroad rolling stock engineering and manufacturing activities.

ANCO's R-020 system will qualify equipment and validate designs for varying sea state conditions. However, the R-020's capabilities are well in excess of those required to meet such naval specifications as MIL-STD-167.

This 'extra' capacity supports the R-020's use for seismic qualification and shock testing of large equipment. With peak accelerations and displacements (with maximum payload) of 4 g's and 6 inch double amplitude, the R-020 is capable of testing to such seismic specifications as IEEE-344 and Bellcore TR-NWT-000063. Even higher motions are achievable with reduced payloads.

High table stiffness and other system properties are achieved using four redundant torque tubes to control table pitch and roll as well as special joint designs to minimize backlash and 'outer loop' acceleration feedback and control.

The use of torque tubes permits a lower-cost design by enabling the system to be actuated by only two (2) servo- hydraulic actuators, each with very high flowrate servo valves. Each actuator relies upon the 'outer loop' PC-based controller for sine, shock, random, and seismic test control. The ANCO table design, optimized through physical modeling and finite element simulations, relies upon a combined shear and truss concept to help achieve performance goals.