AER 403 Lecture 12: AER 403 W12 copy

• School: Ryerson University
• Department: Aerospace
• Course: AER 403
• Professor: Fengfeng Xi

Document Summary

Mechanisms & vibrations: forced vibrations, forced harmonic vibration, rotating unbalance, rotor balancing, static balancing, dynamic balancing. Course outline: forced harmonic vibration, rotating unbalance, rotor balancing, static balancing, dynamic balancing. What is forced vibration: a system vibrates due to external excitation, excitation could be external force or base movement (displacement) Wind blows on panels car drives on a bumpy road 8, Acoustic load during lift off (a source for forced vibration)* *spacecraft load analysis an overview, a calvi, eesa. The soyuz launcher during transport to the launch* Taking the 1st and 2nd derivative of the assumed solution leads to -m. (cid:884) x sin(cid:523) t- (cid:524) + c x cos(cid:523) t- (cid:524) + k xsin(cid:523) t- (cid:524) = fsin t re-arranging. X[(k-m (cid:884)(cid:524)sin(cid:523) t- (cid:524) + c cos (cid:523) t- (cid:524)] = fsin t. If both sides are divided by [(k-m (cid:884)(cid:524)(cid:884) + (cid:523)c (cid:524)(cid:884)](cid:883)/(cid:884), then.