Vibration Attenuation Soil Model via ABAQUS

Title ABAQUS 2018 – 3D Rectangular Soil Model with Borehole Isolation ([login to view URL] Project) ⸻ Description I need a 3D numerical model in ABAQUS 2018 for an [login to view URL] project. The objective is to evaluate ground vibration attenuation using borehole isolation and calculate the Amplitude Reduction Factor (ARF) at foundation level. This is a simplified academic model, focused on comparison (with vs without isolation), not a full train–track simulation. ⸻ Scope of Work • 3D rectangular soil domain • Layered soil based on borelog data (will be provided) • Dynamic analysis (time-history or harmonic) • Two cases: 1. Without borehole isolation 2. With borehole isolation ⸻ Geometry Details Soil Domain • Plan dimensions: 40 m × 30 m • Depth: 20 m • Soil layers up to 15.5 m, remaining depth same as last layer ⸻ Foundation (Pile Cap) • Size: 1.9 m × 1.9 m × 0.6 m • Located at center • Can be modeled as rigid block (simplified) ⸻ Borehole Isolation • Arrangement: semi-circular / arc around foundation • Number of boreholes: 7 • Diameter: 0.4 m • Spacing: 0.4 m clear • Boreholes to be modeled as voids (cut from soil) ⸻ Material Properties • Linear elastic / equivalent-linear soil behavior • Poisson’s ratio: 0.45 • Density: 1700–1760 kg/m³ • Damping: 3–5% Rayleigh ⸻ Boundary Conditions • Bottom: Fixed • Side boundaries: absorbing / infinite boundaries (mandatory) • Top: Free surface ⸻ Loading • Dynamic vertical load (harmonic or time-history) • Real vibration data available (can be used if needed) ⸻ Outputs Required • Velocity time history at foundation • Peak Particle Velocity (PPV) • Comparison: • Without isolation • With borehole isolation Final Output: • Amplitude Reduction Factor (ARF) ⸻ Deliverables • ABAQUS 2018 (.cae file mandatory) • ABAQUS .inp file • Screenshots: • Geometry • Mesh • Boundary conditions • Results • Short explanation note (1–2 pages) ⸻ Timeline 5–7 days 1 revision included ⸻ Budget ₹5,000 – ₹8,000 ⸻ How to Apply Please include: 1. Experience with 3D dynamic modelling in ABAQUS 2. How you will implement absorbing/infinite boundaries 3. Sample work (if available)

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