*** WARNING # 312 In static load case 1, the compliance is negative or large 4.04523e+010. Optimization/buckling analysis cannot be performed. due to possible rigid body mode. (Running minimum-core solution)

Altair Forum User

Hi guys

 

I have the following assembly and I want to do a linear static analysis. I have used both RBE2 and Freeze contact to connect the components in the assembly

<?xml version="1.0" encoding="UTF-8"?>

 

The following pics shows my RBE2 connections and I have defined FREEZE contact every other places where components touching each other

<?xml version="1.0" encoding="UTF-8"?>

 

<?xml version="1.0" encoding="UTF-8"?>

 

 

 

I can not get proper result the components fly in Hyperview. Here is the warning I have in my .out file

*** WARNING # 312
 In static load case 1, the compliance is negative or large 4.04523e+010.
 Optimization/buckling analysis cannot be performed.
 due to possible rigid body mode.
(Running minimum-core solution)

 

 

I don't know where my mistake is

I appreciate your help

Rahul Rajan_21763

for such assembly i would recommend you to run free free run or modal analysis. which would help to know about connectivity. 

I believe we have many post in forum with error 312.just search with error 312 or compliance is negative.. you would get similar topic on forum. please refer same and try.