Machine Dynamics Tool

MENG 364  ·  King Abdulaziz University

Module 4 — Flywheel Design
Link Lengths
a — Crank ? cm
b — Coupler ?cm
c — Follower ?cm
d — Ground ? cm
Crank (a)
Coupler (b)
Follower (c)
Ground (d)
Assembly: Open
—
Link Masses (kg)
m₂ — Crank ? kg
m₃ — Coupler ?kg
m₄ — Follower ?kg
T_L — Load ? N·m
Flywheel Specification
Speed Fluctuation
ω₂ — Speed rpm
C_s ? —
C_s = (ω_max−ω_min)/ω_avg  ·  Typical: 0.02–0.10
C_s slider0.050
Flywheel Geometry
Type
Material ρ
Width t mm
Inner r_i mm
Animation
Crank angle θ₂0°
Mechanism View
θ₂ = 0°
Input Torque T₁₂ vs θ₂
Energy Curve E(θ) = ∫T₁₂ dθ
Speed Fluctuation ω(θ)
ΔE Envelope (max swing)
Flywheel Sizing Results
ΔE (max energy swing) — J
ω_avg — rad/s
C_s (input) —
I_total required — kg·m²
I_links (links 2–4) — kg·m²
I_flywheel required
—
⚠ Link inertia already exceeds requirement — no flywheel needed, or reduce C_s.
Flywheel Dimensions
Outer radius r_o — mm
Inner radius r_i — mm
Width t — mm
Mass m_fw — kg
Material —
Cross-Section Sketch
—
Speed Variation
ω_avg — rad/s
ω_max — rad/s
ω_min — rad/s
Actual C_s check—
Diagnostics & Observations