DIGITAL SIMULATION OF RANDOM VIBRATIONS.
FLORIDA UNIV GAINESVILLE DEPT OF ENGINEERING SCIENCE AND MECHANICS
Pagination or Media Count:
A physically realizable stationary, Gaussian, random load is simulated digitally and employed as the forcing function in the equation of motion of a damped, elastic beam whose resistance to deformation is due to bending and stretching. The power residue method for generating pseudo-random numbers is employed in the technique presented for constructing the random function, whose statistical properties correspond closely to those of pressure signals measured in the noise field of a turbulent, subsonic air jet. The nonlinear equation of motion is solved in finite-difference form with a forcing function representing a time-random concentrated load applied transversely at midspan. From numerical solutions, statistical measures of response at midspan and at the quarter points of the beam are computed. Author