PKSC 4400 Lecture Notes - Lecture 9: Astm International, Unit Load, Statistical Significance
10 Mar 2020
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3: amax = aw2, w = frequency rad/3, a = altitude of displacement (inches, a = 0. 5 in, amax = 1g = 386. 1 in/s2, rotary vs. vertical motion, dynamics are different just think of the motions. Time : test time) ratio: field overall grms level must be uncompressed data, theory is based on ductile failure, stress-life diagram (sn, types of vibration tables, mechanical (won"t do random vibration, servo-hydraulic (electro-hydraulic) 7: average psd limitations, assumption steady state vibration [constant vibration intensity level, i. e. rms (root mean. Square) value: reality: fluctuations in road roughness (profile) and vehicle speed, result: high amplitude events are unrepresented in the psd simulation which could impact product damage, proposed vibration simulation techniques, time history, one trip no statistical significance. How do you select the one: we don"t know if it was a good day or a bad day.
