The Naval Surface Warfare Center, Dahlgren Division has a high-impact shock test machine known as WOX-7B. The WOX-7B should be of tremendous interest to anyone who has a need for shock testing of "heavy" items. The shock tester simulates the inertial effects of underwater explosion shocks encountered by surface ships. The principal use of this machine has been the developmental testing of weapon systems. The WOX-7B is an A-frame from which a pendulum is hung. The end of the pendulum is the 11,000-pound, 16-inch gun liner. It is raised to a prescribed height by the hydraulic lift and released. The machine delivers a hammer blow to a platform, which supports the test item. In this regard, this is similar to the medium-weight shock machine as outlined in the military specification MIL-S-901D [1]. The differences are in the weight of the hammers, platform design, and its angle relative to vertical. Much larger and heavier items can be tested on the WOX-7B machine than can be tested on the medium-weight shock test machine.
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