application-note · English
Introduction to Simulator (Part 1)
The first part of Hitachi's Technical Information Series No. 9 introduces simulator applications for civil and structural engineering problems using analog and hybrid computers. It covers flood prediction methods including the storage function, unit graph, and outflow function approaches, showing how the governing differential equations are implemented on analog hardware. A second major section describes earthquake response simulation using the SERAC (Strong Earthquake Response Analysis Computer) analog computer, treating linear and non-linear single- and multi-mass-point vibration models of high-rise buildings; the SERAC system comprises integrators, special integrators, adders, inverters, potentiometers, function generators, and voltage comparators.