On the high energy forming, the source length becomes important factor to the generated shock pressure characters, as the length of source can not be neglected comparing with the pulse duration of generated pressure.
The shock pressure generated by such identified line source is varied in its waveform (not only peak pressure but also pulse duration) to the radiated direction.
This paper deals with the general directional characteristics of this pressure and especially the effective pulse duration and energy co-factor are defined. From the results, it can be found that the length of pressure source considerably influences to the radiated pressure characteristics and the defined factors give one of the effective index for radiated shock pressure.
