Engine-Gasket HPC trial and Suspension NVH analysis using Linear_Perturbation ANSYS Japan Mechanical BU Toru Hiyake

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1 Engine-Gasket HPC trial and Suspension NVH analysis using Linear_Perturbation ANSYS Japan Mechanical BU Toru Hiyake

2 Agenda Topic 1 : Engine-Gasket Nonlinear Analysis Legacy Data Import Gasket modeling Bolt Pretension modeling HPC Performance Topic 2 : Leaf-Spring Suspension Dynamic Analysis Tire Model Leaf Spring Model Suspension Assy Model Linear Perturbation

3 Topic 1 : Engine-Gasket Nonlinear Analysis

4 < Topic 1 : Engine-Gasket Nonlinear Analysis > Legacy Data Import Data Import in Mechanical using WB tool(external Model) Legacy FE Data (.cdb file) Engine Block(1) ANSYS Mechanical Cylinder Head(x2) Gasket(x2) Bolt(X16)

5 < Topic 1 : Engine-Gasket Nonlinear Analysis > Legacy Data Import Engine Block(1) + Cylinder Head(x2) + Gasket(x2) + Bolt(x16) Elements : 2,017,780 Nodes : 3,379,929 Total DOF : 10,130,299

Solid185 is one order structural element(original element in.

6 < Topic 1 : Engine-Gasket Nonlinear Analysis > Gasket Modeling : Element Setting ANSYS Gasket Elements Inter Change Element Type From Solid185 to Inter195 Gasket Solid185 is one order structural element(original element in.cdb file) Inter195 is one order gasket element Using Command Object Gasket Mesh Solid185 element Inter195 element Command Object

The material also exhibits quite complicated unloading behavior when compression is

7 < Topic 1 : Engine-Gasket Nonlinear Analysis > Gasket Modeling : Material Setting Gasket Material The gasket material is usually under compression and is highly nonlinear. The material also exhibits quite complicated unloading behavior when compression is released. WB Engineering Data ANSYS support Gasket material Gasket material in WB Engineering Data

8 < Topic 1 : Engine-Gasket Nonlinear Analysis > Boundary Conditions : Bolt Model This boundary condition applies a pretension load to a cylindrical face, to bodies, typically to model a bolt under pretension. Easy Bolt modeling In Mechanical, user can set this boundary condition easily. Pattern copy using object generator Bolt Pretension Setting in Mechanical

9 < Topic 1 : Engine-Gasket Nonlinear Analysis > Boundary Conditions : Constraints Direct Node Selection for displacement s constraint. Boundary Condition Setting in Mechanical

< Topic 1 : Engine-Gasket Nonlinear Analysis > Solver Setting

Solver PCG Iterative Solver Analysis Type Solver Type HPC

Solver Type Parallel Type Cores DMP(Distribute Memory Parallel)

10 < Topic 1 : Engine-Gasket Nonlinear Analysis > Solver Setting Analysis Type Non-Linear Statics Solver Type Sparse Direct Solver PCG Iterative Solver Analysis Type Solver Type HPC Setting HPC Setting Parallel Type SMP(Shared Memory Parallel) Solver Type Parallel Type Cores DMP(Distribute Memory Parallel) Sparse SMP Number of Cores 2,4,8,12 PCG DMP SMP DMP 2,4,8,12 Setting Combination

DELL T7600 Type B CPU Memory HD Drive OS Type A1 8

6GHz 64GB, 1866MHz 3TB, 7200RPM Win7 Type A2 8 Core

6GHz 64GB, 1866MHz 256GB, SSD Win7 Type A3 8 Core

11 < Topic 1 : Engine-Gasket Nonlinear Analysis > Hardware Information DELL T5610 Type A1 & A2 & A3 DELL T7600 Type B CPU Memory HD Drive OS Type A1 8 Core x 2(16 Core), 2.6GHz 64GB, 1866MHz 3TB, 7200RPM Win7 Type A2 8 Core x2(16 Core), 2.6GHz 64GB, 1866MHz 256GB, SSD Win7 Type A3 8 Core x2(16 Core), 2.6GHz 64GB, 1866MHz 420GB, Fusion-io Win7 Type B 6 Core x 2(12 Core), 2.3GHz 256GB, 1600MHz 2TB, 7200RPM Win8

12 < Topic 1 : Engine-Gasket Nonlinear Analysis > Analysis Requirements Sparse Direct Solver Information 100G Byte!! H/W Solver Type Memory Mode.LN09 Type A Direct Optimal Out-of-Core 95GByte PCG In-Core - Type B Direct In-Core - PCG In-Core - Nonlinear EQUILIBRIUM ITERATION Total Number : 8 Number of Iteration

13 < Topic 1 : Engine-Gasket Nonlinear Analysis > Results Mises Stress Gasket Disp.

14 < Topic 1 : Engine-Gasket Nonlinear Analysis > Results : Hardware v.s. Solver Hardware Solver Number of Cores : HD, SSD, Fusion-io, Large_MEM : Direct_SMP, Direct_PCG, PCG_SMP, PCG_DMP : 2(Default) Time (hour) Direct_SMP Direct_DMP PCG_SMP PCG_DMP HD SSD Fusion-io Large_MEM

15 < Topic 1 : Engine-Gasket Nonlinear Analysis > Results : Parallel v.s. Solver Hardware Solver : SSD Number of Cores : 2, 4, 8, 12 : Direct_SMP, Direct_PCG, PCG_SMP, PCG_DMP Time (hour) Cores 4 Cores 8 Cores 12 Cores Direct_SMP Direct_DMP PCG_SMP PCG_DMP

16 Topic 2 : Leaf-Spring Suspension Dynamic Analysis

17 < Topic 2 : Leaf-Spring Suspension Dynamic Analysis > Process Flowchart Workbench Schematic Nonlinear Statics Eigen Value Frequency Response Linear Perturbation

18 < Topic 2 : Leaf-Spring Suspension Dynamic Analysis > Tire Modeling Modeling Keyword Hyper Elastic Material Reinforce Elements Hydrostatic Fluid Pressure Contact Section Tire & Wheel Tire model for NVH Analysis Foot Print Deformation

19 < Topic 2 : Leaf-Spring Suspension Dynamic Analysis > Leaf Spring Modeling Modeling Keyword Large Deformation Contact Bushing Plate Contact Front Bush Rear Bush x 2 Deformation(Animation)

20 < Topic 2 : Leaf-Spring Suspension Dynamic Analysis > Suspension Modeling Boundary Conditions Tire Inner Pressure 0.2MPa Contact between Tire and Ground Penalty Method Friction : 0.2 Contact between Plates Augmented Lagrange Method Friction : 0.2 Enforced Displacement Ground Area Z direction : +40mm Displacement

21 < Topic 2 : Leaf-Spring Suspension Dynamic Analysis > Suspension Analysis Non linear Statics Elapsed Time : 506(s) Non_Linear Iterations Displacement Equivalent Elastic Strain(Animation) Equivalent Stress

22 < Topic 2 : Leaf-Spring Suspension Dynamic Analysis > Suspension Analysis Eigen Value Analysis after Static Analysis Linear Perturbation Process Initial Stress Last deformation & Stiffness Mode 2 : 16Hz(Animation) Mode 4 : 20Hz(Animation)

Eigenvalue Analysis Modal FRF Creation Input Point (Under

23 < Topic 2 : Leaf-Spring Suspension Dynamic Analysis > Suspension Analysis Frequency Response Analysis after Eigenvalue Analysis Modal FRF Creation Input Point (Under Leaf +Z) Frequency Response Function Output Point (Leaf Tip +Y)

24 Conclusion ANSYS HPC performance ANSYS s solver performance is continuing to be improved. SMP/DMP Direct/Iterative HPC ANSYS Non_Linear Staics & Dynamics Analysis ANSYS has many nonlinear technology. Gasket Rubber Contact Reinforce Hydrostatic Fluid Etc Statics & Dynamics combination analysis(linear perturbation) is very easy using WB.

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