Optimization and Analysis of Front Telescopic Suspension …
49
10 kmph
15 kmph
20kmph
Improved
suspension
14
13
20
TradiƟonal
suspension
17
17
21
0
5
10
15
20
25
Transmissibility
Bump Size 3cm
Fig. 10 Transmissibility versus bike speed
4.3 Structural Analysis
Due to irregular road profile, various stresses are also induced in the shackle plate and
fork body. For structural analysis and to reduce complexity in calculations, reactions
on front and rear tires are assumed to be 40% for front and 60% for rear wheel.
Hence, total load on front suspension is approximately 100 kg. For analysis, coarse
mesh is selected with following parameters,
• Material for shackle plate: steel.
• Density of the material = 7850 kg/m
3 .
• Yield strength of the material = 0.25 × 10
3 MPa.
• Young’s modulus = 200 GPa.
From ADAMS post-processing module, forces transmitted through tires are
measured. Longitudinal and vertical forces are considered for design of fork body
keeping other material parameter as that of shackle plate analysis. Deformation analysis of shackle plate is carried out by fixing inner face of the bottom slot of shackle
plate. Load of 500 N is applied to inner surfaces of the shackle plate through holes
where suspension forks are mounted and maximum stress in the shackle plate is
found to be 09.38 Mpa as shown in Fig. 11.
Outer face of the fork body is constrained as fixed support. Load of 1000 N is
applied to inner surface of the plate where the eye of secondary fork body is to be
attached and maximum developed stress were found to be under safe stress limit as
shown in Fig. 12.
49
10 kmph
15 kmph
20kmph
Improved
suspension
14
13
20
TradiƟonal
suspension
17
17
21
0
5
10
15
20
25
Transmissibility
Bump Size 3cm
Fig. 10 Transmissibility versus bike speed
4.3 Structural Analysis
Due to irregular road profile, various stresses are also induced in the shackle plate and
fork body. For structural analysis and to reduce complexity in calculations, reactions
on front and rear tires are assumed to be 40% for front and 60% for rear wheel.
Hence, total load on front suspension is approximately 100 kg. For analysis, coarse
mesh is selected with following parameters,
• Material for shackle plate: steel.
• Density of the material = 7850 kg/m
3 .
• Yield strength of the material = 0.25 × 10
3 MPa.
• Young’s modulus = 200 GPa.
From ADAMS post-processing module, forces transmitted through tires are
measured. Longitudinal and vertical forces are considered for design of fork body
keeping other material parameter as that of shackle plate analysis. Deformation analysis of shackle plate is carried out by fixing inner face of the bottom slot of shackle
plate. Load of 500 N is applied to inner surfaces of the shackle plate through holes
where suspension forks are mounted and maximum stress in the shackle plate is
found to be 09.38 Mpa as shown in Fig. 11.
Outer face of the fork body is constrained as fixed support. Load of 1000 N is
applied to inner surface of the plate where the eye of secondary fork body is to be
attached and maximum developed stress were found to be under safe stress limit as
shown in Fig. 12.