{
  "engine": "Project Chrono / PyChrono elastic FEA and dynamics",
  "engine_version": "9.0.1",
  "mesher": "Gmsh",
  "mesher_version": "4.14.1",
  "experiment": "Tool-tip lag from STEP lateral stiffness under base acceleration",
  "young_modulus_Pa": 2000000000.0,
  "poisson_ratio": 0.3,
  "material_density_kg_m3": 1200.0,
  "lateral_test_force_N": 10.0,
  "mesh_sizes_mm": [3.0, 2.5],
  "tool_mass_kg": 0.5,
  "modal_arm_mass_fraction": 0.23,
  "damping_ratio": 0.04,
  "base_acceleration_amplitude_m_s2": 20.0,
  "acceleration_frequencies_Hz": [10.0, 20.0],
  "duration_s": 0.5,
  "time_step_s": 0.0002,
  "required_relative_tracking_error_reduction": 0.18,
  "maximum_candidate_tracking_error_m": 0.001,
  "maximum_relative_mesh_tracking_error_change": 0.1,
  "maximum_relative_mass_change": 0.000001,
  "maximum_end_pad_missing_mm3": 0.0001,
  "maximum_end_pad_excess_mm3": 0.0001,
  "maximum_envelope_excess_mm3": 0.0001
}