Figure P9.20 shows a simply supported massless beam with a lumped mass at the center subjected to…

Figure P9.20 shows a simply supported massless beam with a lumped mass at the center subjected to motions ug1(t) and ug2(t) at the two supports. Formulate the equation of motion governing the dynamic component of displacement u (= total displacement − quasi-static displacement) of the lumped mass. Express this equation in terms of m, ,

 

 

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