Frequency calculation

1) I) Rear sprung mass frequency based on wheel base and speed will be 1.358 Hz, time lag because of wheel base and speed is 0.10 sec.

II) Front sprung mass frequency at design condition 1.131 Hz

III) Front Spring rate 23.853 N/mm

IV) Rear Spring rate 27.711 N/mm

V) Front sprung mass frequency at Curb and GVW are 1.221 Hz and 1.127 Hz respectively.

VI) Rear sprung mass frequency at Curb and GVW are 1.612 Hz and 1.248 Hz respectively.

VII) Front unsprung mass frequency at all three conditions is 8.698 Hz 

VIII) Rear unsprung mass frequency at all three conditions is 10.73 Hz

IX) Rear/Front frequency ratio at Curb, Design and GVW condtions are 1.321.180 and 1.107 Respectively.


Projects by Kartik Suthar

King pin optimization
Kartik Suthar · 2020-03-30 04:39:28

After hardpoint tuning, less amount of camber gain observed, and less amount of toe-change reduced.   We can\'t control all parameters independently.. caster, caster arm length and steer axis offset(longitudinal) are dependend on each-other. and King pin inclin Read more

post processing
Kartik Suthar · 2019-10-16 16:11:29

All screenshots are attached in ZIP file.... Read more

Damping co-efficient
Kartik Suthar · 2019-09-24 06:43:17

I) Front sprung mass critical damping 5947.299 Kg/sec     Rear sprung mass critical damping 6526.046 Kg/sec II) Front unsprung mass critical damping 6971.37 Kg/sec      Rear unsprung mass critical damping 5796.55 Kg/sec III) Front sprung mas Read more

1. Wheel rate differs from spring rate because of motion ratio. motion ration generates because of suspension geometry like arm length and suspension attachment point etc. And Wheel rate = Spring rate * (MR)`square`. 2. Wheel rate measures by wheel center line consider Read more

Side View Geometry
Kartik Suthar · 2019-08-13 15:13:37

1. Castor- 6 degree positive     Mechanical trail- 15 mm     KPI- 10 degree      Scrub radius- 30 mm     Spindle Length- 90 mm 2. Restoring Moment- 50 Nm 3. Suggested Change to change sign of scrub radius     Read more

1. Instant Center location Y= 950 mm (negative)                                      Z= 235 mm   2. Roll center Height = 190 mm (below ground)   zip file attach Read more


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