Fast Simulation Method for Seismic Diagnosis
of Extensive Distribution Networks
SUZUKI Nobuhisa NAKAJIMA Yoshikazu TSUNASAWA Yoji
Abstract
A newly-developed simulation program, NeEX,
enables quick prediction of the nonlinear seismic
response of buried distribution networks in gas and
water supply systems, which are characterized by geometry
in a complex linear form. As a key feature of NeEX,
the novel algorithm which is used to simulate the seismic
response of the network idealizes the network in segments.
Idealization of networks in segments makes it
possible to model networks using far fewer elements
than in finite element analysis (FEA). While the accuracy
of NeEX is on the same level as FEA, computational
time is only 1/5000-10000 that with FEA. The
high accuracy and high speed performance of NeEX in
simulations enables seismic diagnosis of extensive buried
distribution networks.
