Thank you for ur reply Dave Diehl

1. In Caesar II config file, MISSING MASS ZPA there are two options extracted and spectrum. but if i select extracted or spectrum, the included missing mass results are same. what it means????

2. In spectrum we are entered largest frequency is 10 HZ ( spectrum range shown below) so corresponding acceleration as ZPA and it calculates force It is clear..


* RANGE
* FREQ (Hz)
10.0000
5.0000
3.3333
2.5000
2.0000
1.6667
1.2500
1.0000
0.8333
0.7143
0.6250
0.5556
0.5000
0.4167
0.3571
0.3333

3. but if i select extracted and i keep the cut off freq 33 HZ how Caesar know what is the acceleration value at 33 HZ ???? & in what way Caesar is calcating force then.....