1.3.24 Beam fluid inertia

Products: ABAQUS/Standard  ABAQUS/Explicit  

Features tested

This section provides basic verification tests for the *BEAM FLUID INERTIA option that can be used with all Timoshenko beams.

Elements tested

B21    B22    B31    B32   

Problem description

There are two sets of problems presented in this section. The first set includes the input files b21_circ_bfi.inp and b21_circ_bai.inp and verifies the use of the *BEAM FLUID INERTIA option in a *FREQUENCY analysis. The second set consists of the remaining input files and tests the use of the *BEAM FLUID INERTIA option in transient dynamic analysis with the *BEAM SECTION or *BEAM GENERAL SECTION option. The transient dynamic analyses are also performed using ABAQUS/Explicit to verify the *BEAM FLUID INERTIA option in ABAQUS/Explicit.

Results and discussion

The results obtained from b21_circ_bfi.inp using *BEAM FLUID INERTIA agree well with the results from b21_circ_bai.inp, which uses *BEAM ADDED INERTIA to add equivalent masses.

The ABAQUS/Explicit transient analysis results closely match the transient analysis results obtained using ABAQUS/Standard.

Input files

ABAQUS/Standard input files

b21_circ_bfi.inp

B21 element, frequency extraction, *BEAM FLUID INERTIA.

b21_circ_bai.inp

B21 element, frequency extraction, *BEAM ADDED INERTIA.

iw_bs_b21_dyl_bfi.inp

B21 element, *BEAM SECTION, transient dynamic.

iw_bs_b22_dyl_bfi.inp

B22 element, *BEAM SECTION, transient dynamic.

iw_bs_b31_e_dyl_bfi.inp

B31 element, *BEAM SECTION, transient dynamic, exact rotary inertia formulation.

iw_bs_b31_i_dyl_bfi.inp

B31 element, *BEAM SECTION, transient dynamic, isotropic rotary inertia formulation.

iw_bs_b32_e_dyl_bfi.inp

B32 element, *BEAM SECTION, transient dynamic, exact rotary inertia formulation.

iw_bs_b32_i_dyl_bfi.inp

B32 element, *BEAM SECTION, transient dynamic, isotropic rotary inertia formulation.

iw_bgs_b21_dyl_bfi.inp

B21 element, *BEAM GENERAL SECTION, transient dynamic.

iw_bgs_b22_dyl_bfi.inp

B22 element, *BEAM GENERAL SECTION, transient dynamic.

iw_bgs_b31_e_dyl_bfi.inp

B31 element, *BEAM GENERAL SECTION, transient dynamic, exact rotary inertia formulation.

iw_bgs_b31_i_dyl_bfi.inp

B31 element, *BEAM GENERAL SECTION, transient dynamic, isotropic rotary inertia formulation.

iw_bgs_b32_e_dyl_bfi.inp

B32 element, *BEAM GENERAL SECTION, transient dynamic, exact rotary inertia formulation.

iw_bgs_b32_i_dyl_bfi.inp

B32 element, *BEAM GENERAL SECTION, transient dynamic, isotropic rotary inertia formulation.

iw_bgs_b31_dyl_bfi_half.inp

B31 element, *BEAM GENERAL SECTION, transient dynamic, the HALF parameter on the *BEAM FLUID INERTIA option.

iw_bfi_std.inp

B31 elements, *BEAM GENERAL SECTION, transient dynamic, different radii on the *BEAM FLUID INERTIA option to test dynamic response to constant plane-wave pressure gradients.

iw_bfi_std_bbl.inp

B31 elements, *BEAM GENERAL SECTION, transient dynamic, different radii on the *BEAM FLUID INERTIA option to test dynamic response to bubble loading.

iw_bfi_std_refbbl.inp

B31 elements, *BEAM GENERAL SECTION, transient dynamic, different radii on the *BEAM FLUID INERTIA option to test dynamic response to bubble loading with reflections from a “hard” plane.

iw_bfi_std_refl.inp

B31 elements, *BEAM GENERAL SECTION, transient dynamic, different radii on the *BEAM FLUID INERTIA option to test dynamic response to spherical loading with reflections from a “hard” plane.

iw_bfi_std_reflec.inp

B31 elements, *BEAM GENERAL SECTION, transient dynamic, different radii on the *BEAM FLUID INERTIA option to test dynamic response to planar loading with reflections from a “soft” plane.

iw_bgsm_bfi_std_refl.inp

B31 elements, *BEAM GENERAL SECTION, transient dynamic, comparison of meshed and general section definitions to test dynamic response to planar loading with reflections from a “hard” plane.

ABAQUS/Explicit input files

iw_bs_b21_dyl_bfi_xpl.inp

B21 element, *BEAM SECTION, transient explicit dynamic analysis.

iw_bs_b22_dyl_bfi_xpl.inp

B22 element, *BEAM SECTION, transient explicit dynamic analysis.

iw_bs_b31_e_dyl_bfi_xpl.inp

B31 element, *BEAM SECTION, transient explicit dynamic analysis, exact rotary inertia formulation.

iw_bs_b31_i_dyl_bfi_xpl.inp

B31 element, *BEAM SECTION, transient explicit dynamic analysis, isotropic rotary inertia formulation.

iw_bs_b32_e_dyl_bfi_xpl.inp

B32 element, *BEAM SECTION, transient explicit dynamic analysis, exact rotary inertia formulation.

iw_bs_b32_i_dyl_bfi_xpl.inp

B32 element, *BEAM SECTION, transient explicit dynamic analysis, isotropic rotary inertia formulation.

iw_bgs_b21_dyl_bfi_xpl.inp

B21 element, *BEAM GENERAL SECTION, transient explicit dynamic analysis.

iw_bgs_b22_dyl_bfi_xpl.inp

B22 element, *BEAM GENERAL SECTION, transient explicit dynamic analysis.

iw_bgs_b31_e_dyl_bfi_xpl.inp

B31 element, *BEAM GENERAL SECTION, transient explicit dynamic analysis, exact rotary inertia formulation.

iw_bgs_b31_i_dyl_bfi_xpl.inp

B31 element, *BEAM GENERAL SECTION, transient explicit dynamic analysis, isotropic rotary inertia formulation.

iw_bgs_b32_e_dyl_bfi_xpl.inp

B32 element, *BEAM GENERAL SECTION, transient explicit dynamic analysis, exact rotary inertia formulation.

iw_bgs_b32_i_dyl_bfi_xpl.inp

B32 element, *BEAM GENERAL SECTION, transient explicit dynamic analysis, isotropic rotary inertia formulation.

iw_bgs_b31_dyl_bfi_half_xpl.inp

B31 element, *BEAM GENERAL SECTION, transient explicit dynamic analysis, the HALF parameter on the *BEAM FLUID INERTIA option.

iw_bfi_xpl.inp

B31 elements, *BEAM GENERAL SECTION, transient dynamic, different radii on the *BEAM FLUID INERTIA option to test dynamic response to constant plane-wave pressure gradients.

iw_bfi_xpl_bbl.inp

B31 elements, *BEAM GENERAL SECTION, transient dynamic, different radii on the *BEAM FLUID INERTIA option to test dynamic response to bubble loading.

iw_bfi_xpl_refbbl.inp

B31 elements, *BEAM GENERAL SECTION, transient dynamic, different radii on the *BEAM FLUID INERTIA option to test dynamic response to bubble loading with reflections from a “hard” plane.

iw_bfi_xpl_refl.inp

B31 elements, *BEAM GENERAL SECTION, transient dynamic, different radii on the *BEAM FLUID INERTIA option to test dynamic response to spherical loading with reflections from a “hard” plane.

iw_bfi_xpl_reflec.inp

B31 elements, *BEAM GENERAL SECTION, transient dynamic, different radii on the *BEAM FLUID INERTIA option to test dynamic response to planar loading with reflections from a “soft” plane.

iw_bgsm_bfi_xpl_refl.inp

B31 elements, *BEAM GENERAL SECTION, transient dynamic, comparison of meshed and general section definitions to test dynamic response to planar loading with reflections from a “hard” plane.