bond_style zero command
bond_style zero nocoeff
bond_style zero bond_style zero nocoeff bond_coeff * bond_coeff * 2.14
Using an bond style of zero means bond forces and energies are not computed, but the geometry of bond pairs is still accessible to other commands.
As an example, the compute bond/local command can be used to compute distances for the list of pairs of bond atoms listed in the data file read by the read_data command. If no bond style is defined, this command cannot be used.
The optional nocoeff flag allows to read data files with a BondCoeff section for any bond style. Similarly, any bond_coeff commands will only be checked for the bond type number and the rest ignored.