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Unformatted text preview: AAE 352 AAE352 Lecture 6 Inertia forces with rotational acceleration AAE 352 Rotational acceleration about the c.g. causes translational acceleration along the structure && r r && z n W AAE 352 Rotational acceleration creates dAlembert forces in addition to those computed using the load factor rotational acceleration inertia forces are added to the load factor effect && mr && z i n w z i n w z i n w z i n w AAE 352 Examplecalculate weight due to rotational acceleration of two tip tanks located 220 inches on either side of the c.g. R=220 in. m=w/g I F mR = && R && 2 1.08 rad / sec = && AAE 352 Tip tank inertia loads tank weighs 2000 lb. R=220 in. m m=2000/g F I = (2000/g)*(220 in/12)*1.08 = 1230 lb. F I = 1230 lb. mR && & & AAE 352 Calculate the applied loads to find the shear force in the connectors for each tank if the aircraft load factor is n z = 1. 1230 lb. & & 1230 lb. 2000 lb. 2000 lb. n z = 1 +z AAE 352 Right wing tank load FBD Load #1= n z *2000 lb. =1*2000 lb. Load #2 =1230 lb. V = 2000+1230 =3230 lb. AAE 352 Left wing tank load FBD Load = n z *2000 lb. =1*2000 lb. 1230 lb. V = 770 lb. =20001230 AAE 352 Rotational acceleration produces an inertia moment c.g....
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This note was uploaded on 01/18/2012 for the course AAE 352 taught by Professor Chen during the Fall '08 term at Purdue UniversityWest Lafayette.
 Fall '08
 Chen

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