NumericalMethodsinContinuumMechanics2000,LiptovskýJán,SlovakRepublic1 Symboliccomputationsforrandomfields usingsecondorderperturbationmethod MarcinKaminski DepartmentofCivilEngineering,GeorgeBrownSchoolofEngineering RiceUniversity,6100MainStreet,Houston,77005-1892TX,USA e-mail:kaminski@ruf.rice.edu DivisionofMechanics...