Reduced Input
*Node and *Element Cards are removed.
*KEYWORD *TITLE Natural Frequency of a Nonlinear Spring-Mass System *CONTROL_TERMINATION 0.150000 0 0.0 0.0 0.0 *CONTROL_TIMESTEP 1.000e-04 1.000e-04 0 0.0 0.0 0 0 0 0.0 0 0 *DATABASE_NODOUT 0.000100 *DATABASE_BINARY_D3PLOT 0.001000 *DATABASE_HISTORY_NODE 1 *PART 1 1 1 *SECTION_DISCRETE 1 0 0.0 0.0 0.0 0.0 0.0 0.0 *MAT_SPRING_NONLINEAR_ELASTIC 1 1 *DEFINE_CURVE 1 0 1.000000 1.000000 0.0 0.0 0.00 0.0000 0.10 0.2040 0.20 0.4320 0.30 0.7080 0.40 1.0240 0.50 1.5000 0.60 2.0640 0.70 2.7720 0.80 3.6480 0.90 4.7160 1.00 6.0000 *ELEMENT_DISCRETE *ELEMENT_MASS *NODE *BOUNDARY_SPC_NODE 2 0 1 1 1 1 1 1 *END