"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c

:link(lws,http://lammps.sandia.gov)
:link(ld,Manual.html)
:link(lc,Section_commands.html#comm)

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dihedral_style nharmonic command :h3

[Syntax:]

dihedral_style nharmonic :pre

[Examples:]

dihedral_style nharmonic
dihedral_coeff 3 10.0 20.0 30.0 :pre

[Description:]

The {nharmonic} dihedral style uses the potential:

:c,image(Eqs/dihedral_nharmonic.jpg)

The following coefficients must be defined for each dihedral type via the
"dihedral_coeff"_dihedral_coeff.html command as in the example above, or in
the data file or restart files read by the "read_data"_read_data.html
or "read_restart"_read_restart.html commands:

n (integer >=1)
A1 (energy)
A2 (energy)
...
An (energy) :ul

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[Restrictions:]

This angle style can only be used if LAMMPS was built with the
USER_MISC package.  See the "Making LAMMPS"_Section_start.html#start_3 
section for more info on packages.

[Related commands:]

"dihedral_coeff"_dihedral_coeff.html

[Default:] none
