# TKPH rating calculation

1. Dec 2, 2009

### knightza

I've just started a research on the tyre of mining trucks and am a bit unsure on how to calculate the TKPH ratings.

Say for this set of data from VIMS,

GMW = 390 tons
Total cycle time = 15:29 minutes
Total cycle distance = 6.8 km

And that is one shift.

So, mean tyre load = 390 + 245.1/2 = 512.55 tons
AWSS = (6.8*1)/(15.5/60)

TKPH rating = mean tyre load * AWSS > 13000 ton-kilometer per hour which is REALLY big.

Can anyone see what I did wrong?

2. Aug 15, 2011

### omarspark

Then you have to obtain your vehicle information about weight disturibtion and number of wheels to get each tire load.
Like for example--2 front tires and 4 rear tires with distribution......
Front% 55% 35%
Rear% 45% 65%
front 39.87 53.63 ---mean tire load .....46.75
rear 16.31 63.37 ---mean tire load .....39.84

AWSS=6.8/(15.5/60)=26.3226
TKPH=MTL*AWSS
front =46.75*26.3226 = 1230
rear =39.84*26.3226 = 1048
THATS TOO some high as distance=6.8 km and low time 15.5 for the whole cycle,and sure big payload 245.
GOOD LUCK

3. May 8, 2012

### CBC1969

THE BELOW PASTED TREAD, NEED CLARFICATION.
EG ( 390*65%)/4= 63.37 BUT ON THE FRONT
(390*35%)/2=68.25,( IT HAS BEEN MENTIONED AS 53.63) HOW IT SI ARRIVED
PLEASE CLARFY AS I HAVE TO WORK ON CERTAIN TKPH CALUALTION.

CBC

Then you have to obtain your vehicle information about weight disturibtion and number of wheels to get each tire load.
Like for example--2 front tires and 4 rear tires with distribution......
Front% 55% 35%
Rear% 45% 65%
front 39.87 53.63 ---mean tire load .....46.75
rear 16.31 63.37 ---mean tire load .....39.84

AWSS=6.8/(15.5/60)=26.3226
TKPH=MTL*AWSS
front =46.75*26.3226 = 1230

4. May 8, 2012

### omarspark

it is mistake, use the weight distribution% mentioned