Hi, I'm a beginner of FORTRAN 90, I made some simple programs but now my prof asked me to simulate the chaotic motion of double pendulum. I' m desperate cause I don't know where to start, my prof didn't give me any help, I have only the theory of the problem, can someone help me? Thanks
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Problem with FORTRAN 90 code
- Thread starter Aledl17
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If I remember correctly, a double pendulum is described by a system of two second-order non-linear ordinary differential equations. Because of the non-linear part, you'll need to resort to numerical techniques. There are many algorithms for solving ODEs. The easiest to code would probably be Euler's method, however this is relatively inaccurate. If you want something better, Runge-Kutta methods are pretty popular. I've coded up RK4 in C++ before. It shouldn't take much more than 20 lines.
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