MATLAB Answers

force input in ode

2 ビュー (過去 30 日間)
Bhanu Pratap Akherya
Bhanu Pratap Akherya 2021 年 8 月 24 日
編集済み: darova 2021 年 8 月 29 日
i have a set of values for the force term "F" (in the equation my"+cy'+ky=F) saved in an excel file which i have recalled using:
My main code looks something like:
y0=initial conditions
[tsol ysol]=ode15s('beam_function',[1:dt:T],y0);
whereas, my function code looks something like:
function [dy]=beam_function(t,y)
The problem is that i want to recall each value of F at different time steps but i dont know how to do that, can anyone guide me?
Note: F here is not time dependent rather it has been taken from results obtained from a simulation software. Then what should be my approach?


darova 2021 年 8 月 24 日
You need to pass F into your ode function. Read more: LINK
for i = 1:length(F)
[t,y] = ode45(@(t,y)beam_function(t,y,F(i)),...)
function dy = beam_funciton(t,y,F)
  6 件のコメント
darova 2021 年 8 月 29 日
Maybe you need another ode function
function [dy]=beam_function(t,y)
n = numel(y);
dy(n/2) = y(end);
dy(end) = inv(M)*(F-K*y(end)-C*y(end));
And solve it separately


その他の回答 (0 件)


Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by