Vibration response spectrum calculation method for clamped beam multi-degree-of-freedom system

The invention relates to a vibration response spectrum calculation method for a clamped beam multi-degree-of-freedom system, belongs to the field of structural dynamics, and solves the problem that single-degree-of-freedom system response spectrum calculation in the prior art cannot meet required engineering practice. The method comprises the following steps: selecting a flexible beam test piece with a uniform section, inputting different sinusoidal vibrations at two ends of the test piece, and constructing a clamped beam physical model according to the sinusoidal vibrations; acquiring input excitation of the test piece at different positions; based on the dynamic control differential equation of the clamped beam, obtaining a steady-state response solving equation of the test piece under sinusoidal vibration excitation; based on the input excitation of the test piece and the steady-state response solving equation, obtaining vibration responses of the test piece at different positions, and selecting the vibrat