229 results about "Blast effects" patented technology

A munition includes a casing, the casing formed at least in part from a material comprising (i) a meltable or phase-changing material, and (ii) an energetic material; an explosive payload contained within the casing; and a fuze arrangement, the fuze arrangement comprising a main fuze configured and arranged to ignite the high explosive, and at least one secondary fuze configured and arranged to cause the casing material to melt or undergo a phase change. A method of selectively altering the mode of operation of a munition includes: forming a casing, the casing comprising a material comprising (i) a meltable or phase-changing material, and (ii) an energetic material; introducing an explosive payload into the casing; providing a fuze arrangement comprising a main fuse and at least one secondary fuze configured and arranged to cause the casing material to melt or undergo a phase change; and selectively activating the main fuze and the at least one secondary fuze in a manner that provided at least a first and a second mode of operation, the first mode of operation comprising blast coupled with fragmentation effects, and the second mode of operation comprising mainly blast effects.

The invention provides an automatic simulated dummy projectile launching system. The problems that in the conventional simulation actual combat training process, the blast effect of blasting ammunition in the close combat is difficultly simulated in a vivid manner, and the death cannot be avoided are solved, and the problem that the non-gunpowder means is adopted to motivate a fuse so that the simulated dummy projectile is launched is solved; according to the technical scheme, the automatic simulated dummy projectile launching system comprises a canister launcher, a canister launcher control device and the simulated dummy projectile used for being loaded in the canister launcher; the simulated dummy projectile comprises a bomb body shell, a bomb core and a fuse structure at the bottom of a projectile body; the side wall of a canister launcher air cylinder is provided with an air guide hole used for communicating an air cylinder inner cavity with a canister launcher inner cavity, the lower portion of the air cylinder is connected with a high-pressure air storage tank through an air guide pipe and a normally-closed electromagnetic valve, through automatic identification of a target, cooperative control over launching of the percussion fuse is achieved, the projectile body is launched, exploding is simulated, in the launching process, the dangerous hidden dangers brought by gunpowder launching are completely avoided, operation is easy, and the system is safe, reliable, simple in structure and suitable for civil production manufacturing.

An improved building structure and method for making steel frame buildings includes a beam-to-column or beams-to-column joint or connection which is most preferably shop fabricated (as opposed to on-site fabrication) and which offers a considerable savings in both steel requirements (i.e., material savings) and labor to make the joint connection. Also, because material utilization is improved in the connection, the new structure is more resistant to damage by seismic events (i.e., earthquake), by severe weather, and to damage from blast effects (i.e., terrorist attack or accident), than was the prior technology. The improved building structure also mitigates against progressive collapse of the building.