Need help fixing graph

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Michael Fugate 2019-6-12

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https://ww2.mathworks.cn/matlabcentral/answers/466759-need-help-fixing-graph

关闭： MATLAB Answer Bot 2021-8-20

good afternoon,

im trying to ajust this script which was answered from a previous person

%Assign values of lamda from 0.01 to 2, in increments of 0.001

lambda = 0.01:0.001:2;

%assign XsubscriptSF value

XsubscriptSF = 2;

%calculate number of lamda values to be used

n = length(lambda);

%preallocate memory to store X values

X = zeros(1,n);

%Calculate X values

for i = 1:n

X(i) = XsubscriptSF/(1-lambda(i)^2);

end

plot(lambda,X)

title('Lambda VS Static Deflection for X_{SF}')

xlabel('Lambda (units)')

ylabel('X_{SF} (units)')

However, I'm trying to make it look like the graph that I attach in the following picture. If anyone can point out what to do/adjust, it would be greatly appreciated.

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James Browne 2019-6-12

Are you sure you are using the right equation to calculate X? It would also be helpful to know what type of problem this. It looks like a solution to a differential equation, maybe?

It looks to me like you are looking for a time dependant response but the eqiuation for X is not time dependant. If you are looking to generate a plot with 3 families of equations, based on various lambds values, that is not a difficult change to make, if you have the right equation for the time dependant response of the system~

Michael Fugate 2019-6-12

Yes i am trying to solve for X, im just trying to graph the complete solution above the problem is a vibrations problem, static force deflection and to be more specific: Deflection of a spring under static force. The equation is derived from:

X= (Psub zero/K)/(1-(w/wsubscript n)^2)

and lambda is equal to w/wsubscript n

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