hi~I'm Rex.I have a problem,can anyone help me slove it. The problem is : Draw the mode shapes and get the natural frequencies of the cantilever beam(with a force in free end) The bar is shown in Fig.1(you can see in ) and it elastic modulus of 200GPa, cross-sectional area of 0.001m^2, and density of 7860 kg/m^3. P=P0*sinΩ*t applied at point xi,wherei=1,2,3,4,5(five nodes) and respectively(P0=100 ,Ω=30 and t=10(s), t is time,P is force). the problem by commercial code such as matlab. I have a matlab code(Euler–Bernoulli beam),This is the matlab code(Euler-Bernoulli beam). http://www.mathworks.com/matlabcent...of-the-cantilever-beam-with-a-force-in-free-e You can see it there,and try to run in matlab.how can i modify it and transform to Cantilever beam with end load. If you interested this question,we can discuss it. My english is poor,i hope you understand the question which i asked.Nice to meet you.