You can submit an Abaqus job for an input file myjob.inp with the following command.
bsub [LSF options] abaqus job=myjob [Abaqus options]
To submit a parallel calculation you would use the form
bsub -n 4 [LSF-parameters] abaqus job=myjob cpus=4 [Abaqus options]
Here you need to replace [LSF options] with LSF parameters for the resource requirements of the job. Please find a documentation about the parameters of bsub on the wiki page about the batch system. You can display all possible command line options for Abaqus, by logging in to the cluster, loading the Abaqus module and running the command
The command line parameters vary for the different Abaqus products.