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FEM-Lab-2 Frequency Drop Optimization rev2

# FEM-Lab-2 Frequency Drop Optimization rev2 - MAE162D Lab...

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MAE 162D–Lab FEA: Frequency Test, Drop Test, Optimization & h l Al i El Thermal Analysis Example R. S. Shaefer & Tamer Crosby (TA) Mech. & Aerospace Engineering Dept., UCLA inter 2011 Winter 2011 1 MAE 162D FEA Lab Winter 2011

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Frequency Studies A body disturbed from its rest position tends to vibrate at certain frequencies called natural, or resonant frequencies . The lowest natural frequency is called the fundamental frequency. For each natural frequency, the body takes a certain shape called mode shape . Frequency analysis calculates the natural frequencies and the associated mode shapes. Excessive response occurs if a body is subjected to a dynamic load vibrating at one of its natural frequencies. This phenomenon is called resonance. For example, a car with an out of balance tire shakes violently at a certain speed due to resonance. The shaking decreases or disappears at other speeds. Another example is that a strong sound, like the voice of an opera singer, can cause a glass to break. Frequency analysis can help you avoid failure due to excessive stresses caused by resonance. 2 MAE 162D FEA Lab Winter 2011
Frequency Study Tutorial lease follow the mulation Tutorial ot the SW torial of the class!) Please follow the SW Simulation Tutorial (not the SW Tutorial of the class!) on “Frequency Analysis” and perform a frequency analysis of the “Flywheel” shown here and posted on courseweb. The wheel has a radius of 5 cm and is 1 cm thick The material is 316 SS Find the first 5 natural equencies frequencies.

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FEM-Lab-2 Frequency Drop Optimization rev2 - MAE162D Lab...

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