Simulation time in simulink seems to be unending

I have developed a ball bearing mathematical model in simulink considering a number of subsystem for each bearing component,but while I am trying to run it using ODE45 solver(as it is the best solver to analysis dynamic behaviour of bearing) , it's taking unlimited time with a very slow progress,like after 5 hrs. it's still showing zero percent but the simulation is going on.Please suggest a solution .

Following is the Matlab sample code to generate input value for angular speed of shaft which will be the input for running the inner race.

global M_s;

global K_s;

global R_s;

global J_c;

global M_c;

global K_pin;

global R_pin;

global M_b;

global k_ball;

global J_b;

global r_ball;

global M_p;

global K_p;

global R_p;

global r_c;

global r_b;

global r_i;

global n_b;

global omega;

global ecc;

global g;

global R_f;

global RPM;

if (isempty(whos('global','first_time')))

global first_time;

first_time=1;

M_s = VALUE;

K_s = VALUE;

R_s = VALUE;

J_c = VALUE;

M_c = VALUE;

K_pin = VALUE;

R_pin = VALUE;

J_b = VALUE;

M_b = VALUE;

k_ball = VALUE;

r_ball = VALUE;

r_b = VALUE;

r_i = VALUE;

r_c = VALUE;

n_b = VALUE;

M_p = VALUE;

R_p = VALUE;

K_p= VALUE;

R_f = VALUE;

g=9.81;

end

prompt = {'RPM'};

dlg_title = 'Shaft rotating speed';

num_lines = 1;

def = {num2str(RPM)};

answer = inputdlg(prompt,dlg_title,num_lines,def);

if isempty(answer)

return; %i.e, use default values

else

RPM=str2num(answer{1});

end

omega = RPM/60*2*pi;

[Ranjeet]

Hi Samrat,

Can you provide the Simulink model so that the issue can be regenerated and checked for the never-ending simulation time you pointed out. Also, sharing the solver configuration parameters might help to understand the issue if sharing the model is not a possiblity.

The parameters of the ball bearing model and RPM has been provided but it is not clear what is being solved at each timestep.

I suggest referring to the following answer facing similar issues:

Ode taking long time to solve

Also, you can refer/use ball bearing model in Simscape Multibody Contact Forces Library.