| 摘要 |
Aircraft arresting beds constructed of cellular concrete at ends of runways may be subject to damaging effects of jet blast phenomena. Arresting units resistant to such effects are described. A block of compressible material, such as cellular concrete, provides compressive failure characteristics suitable for arresting travel of an aircraft overrunning a runway. A top sheet of relatively thin frangible material positioned above the block provides a stronger, more damage resistant surface, while still readily fracturing in an arresting incident. Intermediate material, such as a foam layer, under the top sheet may be included to provide a protective cushioning effect by mitigating transmission of external phenomena forces to the block. A wrapping, such as polyester net, at least partially enclosing other portions of the arresting unit provides a stable unified composite, without destroying desired compressive failure characteristics of the unit. Arresting units may also include a bottom layer of material stronger than the block of compressible material and a sealant coating with water resistant properties.
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