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Using Fatigue to Compare Sine and Random Environments

Unit 35. Using Fatigue to Compare Sine and Random Environments. Comparing Different Environments in Terms of Damage Potential. Base Input is Navmat P9492 PSD, 60 sec Duration SDOF Response fn=300 Hz, Q=10 Assume fatigue exponent of 6.4 (Steinberg's value for electronic equipment)

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1940 Tacoma Narrows Bridge Collapse (see enm.bris.ac.uk/research/nonlinear/tacoma/tacoma.html)

1940 Tacoma Narrows Bridge Collapse (see www.enm.bris.ac.uk/research/nonlinear/tacoma/tacoma.html). This is a linear 2nd-order ODE, which can be rearranged as. w n (= ) is the natural frequency , which equals for a RLC circuit and for a spring-mass-damper

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Using Fatigue to Compare Sine and Random Environments

1940 Tacoma Narrows Bridge Collapse (see enm.bris.ac.uk/research/nonlinear/tacoma/tacoma.html)