## Extractor Quick Reference

| Physics | Extractor | Function Call |
|---------|-----------|---------------|
| Reaction forces | extract_spc_forces | `extract_spc_forces(op2_file, subcase)` |
| Reaction forces | extract_total_reaction_force | `extract_total_reaction_force(op2_file, subcase)` |
| Reaction forces | extract_reaction_component | `extract_reaction_component(op2_file, component)` |
| Reaction forces | check_force_equilibrium | `check_force_equilibrium(op2_file, applied_load)` |
| Displacement | extract_part_material | `extract_part_material(prt_file, properties_file)` |
| Displacement | extract_frequencies | `extract_frequencies(f06_file, n_modes)` |
| Mass | extract_part_mass_material | `extract_part_mass_material(prt_file, properties_file)` |
| Mass | extract_part_mass | `extract_part_mass(prt_file, properties_file)` |
| Natural frequency | extract_modal_mass | `extract_modal_mass(f06_file, mode)` |
| Natural frequency | get_first_frequency | `get_first_frequency(f06_file)` |
| Natural frequency | get_modal_mass_ratio | `get_modal_mass_ratio(f06_file, direction)` |
| Zernike WFE | extract_zernike_from_op2 | `extract_zernike_from_op2(op2_file, bdf_file)` |
| Zernike WFE | extract_zernike_filtered_rms | `extract_zernike_filtered_rms(op2_file, bdf_file)` |
| Zernike WFE | extract_zernike_relative_rms | `extract_zernike_relative_rms(op2_file, target_subcase)` |
| Strain energy | extract_strain_energy | `extract_strain_energy(op2_file, subcase)` |
| Strain energy | extract_total_strain_energy | `extract_total_strain_energy(op2_file, subcase)` |
| Strain energy | extract_strain_energy_density | `extract_strain_energy_density(op2_file, subcase)` |
| Von Mises stress | extract_solid_stress | `extract_solid_stress(op2_file, subcase)` |
| Von Mises stress | extract_principal_stress | `extract_principal_stress(op2_file, subcase)` |
| Von Mises stress | extract_max_principal_stress | `extract_max_principal_stress(op2_file, subcase)` |
| Von Mises stress | extract_min_principal_stress | `extract_min_principal_stress(op2_file, subcase)` |
| Temperature | extract_temperature | `extract_temperature(op2_file, subcase)` |
| Temperature | extract_temperature_gradient | `extract_temperature_gradient(op2_file, subcase)` |
| Temperature | extract_heat_flux | `extract_heat_flux(op2_file, subcase)` |
| Temperature | get_max_temperature | `get_max_temperature(op2_file, subcase)` |