Victor,
Thanks much for including the two pdf files above. I have some studying to do....
What program do I need to open the .liml file you posted on March12, above?
Thanks for you efforts.
Disla,
I good source for seismic performance of large vessels would be the following two treatise:
1) The Dynamic Behavior of Water Tanks
2) Dynamic Pressures on Accelerated Fluid Containers.
Both of these sources are by G.W. Housner.