# Duffing 振子 - 交互式可视化

通过实时相图、庞加莱截面和势能可视化，探索非线性动力学、混沌理论和 Duffing 振子的丰富行为

> 标准页面: https://elysiatools.com/zh/visualizations/duffing-oscillator

- **分类:** Physics

## 概述

Interactive visualization of the Duffing oscillator - explore nonlinear dynamics, chaos theory, and bifurcation phenomena through the equation ÿ + δẏ + αy + βy³ = γ cos(ωt). Features four real-time visualization panels: time domain plot showing position x(t) with transient/steady-state coloring, phase portrait (ẋ vs x) displaying limit cycles and strange attractors with gradient trails, Poincaré section sampling at fixed drive phase revealing fractal structures, and potential energy surface V(x) = -½αx² + ¼βx⁴ with animated particle. Comprehensive parameter controls: damping δ (0-1.0), linear coefficient α (-2.0 to 2.0), nonlinear coefficient β (0.1-5.0), drive amplitude γ (0-5.0), drive frequency ω (0.1-5.0), initial conditions x₀, v₀ (-3 to 3), time step dt (0.001-0.1), transient time (0-200), and trail length (100-2000). Five preset configurations: classic chaos (δ=0.3, α=-1.0, β=1.0, γ=0.5, ω=1.2), double well oscillation (δ=0.2, α=-1.0, β=1.0, γ=0.3, ω=1.0), periodic motion (δ=0.5, α=1.0, β=1.0, γ=2.5, ω=1.0), hard spring (δ=0.3, α=1.0, β=1.0, γ=0.5, ω=1.2), and free oscillation (δ=0.1, α=-1.0, β=1.0, γ=0). Real-time statistics display: kinetic energy T = ½v², potential energy V(x) = -½αx² + ¼βx⁴, total energy E = T + V, maximum position and velocity, and simulation time. Numerical integration using fourth-order Runge-Kutta (RK4) method converting second-order ODE to first-order system: dx/dt = v, dv/dt = γ·cos(ωt) - δ·v - α·x - β·x³. Visualization options: toggle trajectory display, Poincaré points, potential energy surface, and particle animation. Educational content covering Duffing equation theory, parameter guide (damping, linear/nonlinear coefficients, drive amplitude/frequency), visualization guide (time domain, phase portrait, Poincaré section, potential energy), and applications (mechanical vibrations, nonlinear circuits, biological oscillators, climate dynamics, quantum analogies). Demonstrates double-well potential chaos, period-doubling route to chaos, sensitivity to initial conditions, strange attractors, and hysteresis phenomena. Perfect for nonlinear dynamics education, chaos theory research, and physics demonstrations. Multi-language support (zh, en, es, fr, de, ru, pt).

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