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- - CD -TIRE LATERAL DAMPING 0 2 4 6 8 101214 LOAD X 10**3 LB K3 TORSIONAL STIFFNESS c aa 0 2 4 6 8101214 NLG STRUT STROKE (INCHES FROM FULLY EXTENDED) KD TIRE LATERAL SPRING RATE o h 0 2 4 6 8101214 NGVHTICAL LOAD X 10-3 LB 700 T CFl FRICTIONAL TORQUE - . . , , , . , . . . , , . 0 1 2 3 4 5 6 7 8 9101112 NLG VERTICAL LOAD XlO"3 LB K4 CROSS COUPLED SPRING RATE .- . 1 3 5 7 9 1 1 1 3 1 5 NLG VERTICAL LOAD XlO'"3 LB KS LATERALSPRING RATE 2-1 1 0 3 c x 2 3 0 q : ; : , 0 2 4 6 8 10 12 14 16 NLG STROKE (INCHES FROM FULLY EXTENDED)
2-12 KT TORSIONALSPRING RATE 8- 0 0- 0 2 -4 6 8 10 12 14 16 6 2000 ' 0 NLG STRUT STROKE (INCHES FROM FULLY EXTE N DE D ) MUT TIRE MOMENT COEFFICIENT 0 2 4 6 8 101214 NLG VERTICAL LOAD X 10**3 LB TAXI SPEED - LOAD CURVE c I \ i I 0 40 80 120 160 GROUND SPEED (KNOTS) n 5 a U RR TIRE ROLLING RADIUS T\ 8.5 I . 2 4 6 8 10 12 14 16 18 NLG VERTICAL LOAD XlO"3 LES 40 35 9 30 25 b x' 20 2 5 10 5 0 0 2 4 6 8 10 12 14 16 NLQ STROKE (INCHES FROM FULLY EX1 END ED) 1-12 I SHIMMY ONSET \ 7 STRONG SHIMM'I I --DYNAMIC ANALYSI STATIC ANALYSIS I 0 02 0.4 0.6 0.8 1 12 TORSIONAL FREEPLAY (DEG)
Page 1: 336853 AQARD-U-800 A\ T ADVISORY GR
Page 4 and 5: The Mission of AGARD According to i
Page 6 and 7: L’etude, l’homologation et la m
Page 8 and 9: Preface Fully reliable procedures f
Page 10 and 11: INTRODUCTION Landing gear is an inv
Page 12 and 13: accordtng to the explanauon given i
Page 14 and 15: - SUMMARY The differences in requir
Page 16 and 17: Once preliminary stroke values are
Page 18 and 19: increased inflation pressures and l
Page 20 and 21: Figure 1. Stroke Requirements as a
Page 22 and 23: Maximum Weight ~ Landing Weight Lan
Page 24 and 25: SPACER \ METERING PIN UPPER BEARING
Page 26 and 27: .!2 w 2 1.2e+5 1.0~5 8.0e+4 o 6.0~4
Page 28: 400 350 i 300 P 250 d 200 $ W f 150
Page 31 and 32: 2-2 K,, - Torsional Spring Rate of
Page 33 and 34: 2-4 Q - Tire Roll Rotation about th
Page 35 and 36: 2-6 landing gear shimmy analysis da
Page 37 and 38: : 1 .I FIGURE 7 FIGURE 8 I - + I Y
Page 39: 2-10 these models uses the Moreland
Page 43 and 44: 3-2 therefore based on the requirem
Page 45 and 46: 3-4 pistons within fractions of a s
Page 47 and 48: 3-6 deceleration during brake initi
Page 49 and 50: 3-8 Through interference of aerodyn
Page 51 and 52: 3-10 STA 144.40 Fig. 2-1 Advanced T
Page 53 and 54: 3-12 ............... X 1 Fig. 2 - 5
Page 55 and 56: 200. 100. 0 W. 0.5 Fig. 3-5 Histogr
Page 58 and 59: ANALYSIS AND CONTROL OF THE FLEXIBL
Page 60 and 61: ~ - . govern the dynamic generation
Page 62 and 63: tyre model Is .en orooosed I . in I
Page 64 and 65: nm.1.1 Fig. 5.3-2 Transient respons
Page 66 and 67: 0.012 0.014 0.01s Time ($1 Fig. 5.3
Page 68 and 69: 1.2 I f ltlt I 1 .,( ~ ............
Page 70: - - .. H.Tsukinoki, Antilock Brake
Page 73 and 74: 5-2 NAsTRAN \ 7 1 A CAD I I I I Pro
Page 75 and 76: 5-4 tion time actuator. The possibl
Page 77 and 78: 5-6 Fed with this data, the BEAM pr
Page 79 and 80: 5-8 given used for the excitation o
Page 81 and 82: 5-10 5.2 Quasistochastic Excitation
Page 83 and 84: 5-12 whole frequency range of inter
Page 85 and 86: 6-2 The associated lateral spring c
Page 87 and 88: The expansion of this gives: 2.1 Th
Page 89 and 90: 6-6 where MR represents the frictio
Page 91 and 92:
6-8 The reaction force coming from
Page 93 and 94:
6-10 Although the solution of the M
Page 95 and 96:
6-12 brake force and self aligning
Page 97 and 98:
6-14 For simulation respectively pr
Page 99 and 100:
6-16 10 1 LMPLITUDE (l/degree) 0.1
Page 101 and 102:
6-18 Massfactor MR [Nms2/degr.] 0,0
Page 103 and 104:
6-20 5 Numerical method of investig
Page 105 and 106:
6-22 numerical procedure, however,
Page 107 and 108:
6-24 [Will871 [ W ill8 91 (Will951
Page 109 and 110:
1-2 These examples occurred over IO
Page 111 and 112:
5. DASH 8 MAIN LANDING GEAR SHIMMY
Page 113 and 114:
develop the equations of motion. Th
Page 115 and 116:
E 9
Page 117 and 118:
7-10 .
Page 119 and 120:
7-12 I 1% 6 !I i 3 > t a a 5? Y
Page 121 and 122:
8-2 For larger deformations as they
Page 123 and 124:
8-4 6. COMPUTATION OF THE LANDING I
Page 125 and 126:
8-6 total tire loads at the centre
Page 127 and 128:
8-8 E 30 s - 10 g 20 0 unstable . .
Page 130 and 131:
- INFLUENCE OF NONLINEARITY ON THE
Page 132 and 133:
- The solution is of the form : X =
Page 134 and 135:
Frequency responses ofwtion model f
Page 136 and 137:
(% These 4 integdons can be compute
Page 138 and 139:
5.1.2 Structural description of lan
Page 140:
o.O(r . 1 J/! ,....... ' ..........
Page 143 and 144:
10-2 MSD = steering damper exponent
Page 145 and 146:
10-4 TABLE 1 - Degrees of Freedom S
Page 147 and 148:
10-6 A total of three degrees of fr
Page 149 and 150:
10-8 3.1.3. Translational Kinematic
Page 151 and 152:
10-10 FIXED ADAPTER Fig. 7. Steerin
Page 153 and 154:
10-12 0 - o.5oot+oo 0.000E+00 . 0 -
Page 157 and 158:
a@- NATO @ OTAN 7 RUE ANCELLE 92200
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