235.1 Acceptable Levels of Vibration•Each part or system in a dynamic setting is required to pass “vibration” musters.•Military standards, ISO, KS, SAE, ASTM, etc provide regulations and standards.•Individual companies provide their own standards or design specifications.• Usually stated in terms of amplitude•Usually stated in terms of amplitude, frequency, and duration of test.4Table 5.1 Ranges of frequency and displacement of vibrationFrequency Displacement(Hz)(m)Atomic Vibration101210-10Human PerceptionMachines & Buildings10 – 10010-5– 10-3Swaying of Tall Bldg.1 – 510-2- 1
356Ex. 5.1.2 Comparison between a stereo turntable and a carm=1000 kgk=400,000 N/mm=1 kgk=400 N/mc=8 Ns/m400,000 N/mc=8000 Ns/mcarCD drive400,00020 rad/s40020 rad/s2100080000.22(1000)(20)2010.219.6 rad/snd2180.22(1)(20)2010.219.6 rad/snd
has intentionally blurred sections.
Sign up to view the full version.