Final Exam 5 - Fall Term 2011 MECH 330 Machine Dynamics...

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Fall Term 2011 MECH 330 – Machine Dynamics Page 1 of 9 University of Victoria Department of Mechanical Engineering Final Examination, Dec 14th, 2011 MECH 330: Machine Dynamics CRN: 10829 Instructor: Dr. B. Nadler STUDENT NAME: ________________________________ STUDENT NUMBER: _________________________________ Open TextBook Exam: Only textbook, notes and a non-communicating calculator are permitted. Start time: 19:00 End time: 22:00 There are a total of five (5) questions. Answer all questions. --------- ALL ANSWERS TO BE WRITTEN IN EXAMINATION PAPER ONLY ----------
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Fall Term 2011 MECH 330 – Machine Dynamics Page 2 of 9 Question #1: [20%] Consider the forced vibration of a mass m = 10 - kg connected to a spring of stiffness k = 4000 -N/m and a viscous damper of a coefficient c being driven by a 300-N harmonic force, F(t), at 2-Hz. The steady-state amplitude of vibration is measured to be 0.1-m. a) Calculate the viscous damping coefficient c . b) For what excitation frequency the steady-state amplitude is maximized.
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Fall Term 2011 MECH 330 – Machine Dynamics Page 3 of 9 Question #2: [15%]
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