Discussion Forum

I am trying to simulate a cantilever beam and study its eigen frequency. I want to add a block at the free end of cantilever and measure the change in eigen frequency by changing the mass of the block. I created a block and assigned a blank material with poisson ratio, young modulus and density. Since density (rho) is mass divided by the volume, I was able to calculate the different rho value by changing the mass, which in turn gave different value of eigen frequency, without making use of any body load. I used the 'eigen frequency,prestressed' study and assigned the block as body load but the load type under body load was only in terms of force, and I want to measure the change of eigen frequency in terms of mass, not force. Even without applying any load, I was able to measure the change in eigen frequency by changing the rho value under the material for the block.If I want to measure change in the eigen frequency with different mass, is this the right way to do it?(By varying the mass to get different values of rho under the material section, without making use of any body load). If I have to add body load, how do I do it in such a way that I can vary the mass to see its effect on eigen frequency. Because I do not want force as a load. Any suggestions or advice would be truly appreciated. Thanks.