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Nadir Arada - (Cálculo Numérico) - Portal de docentes FCT/UNL

Nadir Arada - (Cálculo Numérico) - Portal de docentes FCT/UNL

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Problema <strong>de</strong> Cauchy Derivada numérica Aproximação Euler Estabilda<strong>de</strong> Runge-Kutta 2 Runge-Kutta 4<br />

Método <strong>de</strong> Runge-Kutta <strong>de</strong> or<strong>de</strong>m 4<br />

Existem outros métodos, mais complexos, como por exemplo o<br />

método <strong>de</strong> Runge-Kutta <strong>de</strong> or<strong>de</strong>m 4 obtido consi<strong>de</strong>rando o regra <strong>de</strong><br />

integração <strong>de</strong> Simpson:<br />

ui+1 = ui + h<br />

<br />

1<br />

6 Ki + 2K 2 i + 2K3i + K4 <br />

i<br />

on<strong>de</strong> ⎧⎪ ⎨<br />

⎪⎩<br />

<strong>Cálculo</strong> <strong>Numérico</strong> - Équações diferenciais ordinárias<br />

K 1 i = f (ti, ui)<br />

K 2 i = f ti + h<br />

2 , ui + h<br />

2 K1 i<br />

K3 i = f ti + h<br />

2 , ui + h<br />

K4 i = f ti+1, ui + hK3 <br />

i<br />

2 K2 i

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