LINFLOW 1.41 Fluid-Elastics Investigation of an Off-shore System. Fluid dynamics: Methane gas U= 20 m/s Structure L=0.238 m Out. Dia.=0.210 m Inn. Dia.=0.190 m E=210E9 Pa Dens=7800 kg/m3 Description The Structural Model

LINFLOW 1.42 The ANSYS first and second modal frequency are 2.47 Hz and 4.45 Hz. Structural Results for Pipe used in a Fluid- Elastics Analysis. The ANSYS Structure Dynamics The first structural modeThe second structural mode

LINFLOW 1.43 LINFLOW Fluid Dynamic Analysis of Unsteady Pressure into the System Mean static pressure plot Pressure oscillations into the flex loop Frequency spectrum of pressure oscillations

LINFLOW 1.44 LINFLOW Fluid-Elastics Analysis of the System. Eigenvalue Analysis of the Fluid-elastic mode Mode NumberFrequency (Hz)Damping Requirem ent E Real Part Imaginary Part E E E E E E E E E E E E E E E E E E E E E E E E E E E E-02 Eigenvector of the 13.th Fluid-elastic mode