Lightning strike simulation apparatus, method thereof, and program

A lightning strike simulation apparatus comprising:

• a storage unit for storing lightning strike data generated based on statistical data of a lightning strike occurred in nature;
• a setting unit for setting in a simulation space a simulation target, at least one or more lightning strike-receiving candidate points, a reference point, a lightning strike start position, and a lightning electric-current peak value;
• a downward leader advancing unit for advancing a downward leader from the lightning strike start position set by the setting unit;
• an upward leader advancing unit for respectively advancing upward leaders from the lightning strike-receiving candidate points set in the simulation space, when a distance between a leading edge of the downward leader and the reference point is within a first threshold value;
• and
• a lightning strike point determining unit for, when a distance between the leading edge of the downward leader and a leading edge of any one of the upward leaders is within a second threshold value, determining that a lightning strike-receiving candidate point corresponding to the any one of the upward leaders is a lightning strike point,
• wherein the downward leader advancing unit and the upward leader advancing unit respectively advance the downward leader and the upward leader based on the lightning strike data stored in the storage unit.