Hello, I am mounting a component onto structure and I need to determine the maximum force input into the component. My system can be represented by a base driven two degree of freedom oscillator: http://www.freeimagehosting.net/newuploads/xowmr.png I need to determine the force applied to m2: F = k2*(x2-x1) + c2*(x2-x1) This force needs to be a function of (m1,m2,c1,c2,k1,k2,y) and not of (x1,x2). Basically, for a given input y, what will the be force response on m2. Every time I solve the system of equations, my result is a function of x1 and/or x2. Thank you in advance for your help! p.s. If it is easier, feel free to remove the dampers from the system. An un-damped system will work for my purposes.