Newmark
Newmark Time Integration
Syntax
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Governing Equation
The displacement and velocity are integrated as
\[
d_{n+1}=d_n+\Delta{}tv_n+\Delta{}t^2\left(\left(\dfrac{1}{2}-\alpha\right)a_n+\alpha{}a_{n+1}\right),
\]
\[
v_{n+1}=v_n+\Delta{}t\left(1-\beta\right)a_n+\Delta{}t\beta{}a_{n+1}.
\]
The equation of motion is expressed at \(t_{n+1}\).
\[
Ma_{n+1}+Cv_{n+1}+Kd_{n+1}=F_{n+1}.
\]