 Coupling (
          Type ( Automatic )
          Spring (
                 Stiffness ( 1.2e6N/m 5e6N/m )
                 Damping ( 1.3e6N/m/s 3.8e6N/m/s )
                 Break ( 5.4e7N 5.4e7N )
                 r0 ( 2cm 5cm )
          )
          CouplingHasRigidConnection (1)
          Velocity ( 0.2m/s ) 
 )

 Coupling (
          Type ( Automatic )
          Spring (
                 Stiffness ( 1.2e6N/m 5e6N/m )
                 Damping ( 1.3e6N/m/s 3.8e6N/m/s )
                 Break ( 5.4e7N 5.4e7N )
                 r0 ( 2cm 5cm )
          )
          CouplingHasRigidConnection (1)          
          Velocity ( -0.2m/s ) 
 )

