| 摘要 |
Drop testing is performed by controlling the position of a product to be tested with respect to the drop surface until just before the initial impact and then the product is allowed to impact like a free body. Advantageously, realistic, controllable, and substantially repeatable free drop testing can be achieved. In one embodiment of the invention the product is suspended at an angle from a falling structure, e.g., using at least one string or wire, and the suspending material is effectively released just prior to initial impact. By effectively released it is meant actually released, or the effect of the suspending material is essentially negligible, e.g., where the suspending material produces a very low restitutional force when deformed, such as a weak rubber band. The suspension of the object is arranged in such a way that initial impact occurs at the desired point on the product. To this end, depending on the configuration of the object and the number of suspending elements available, it may be necessary that the point of initial impact remain in contact with a platform, which may be part of the structure, that drops along with the product, such as a conventional drop table. In another embodiment of the invention, the drop surface may be moved with respect to the product rather than the product moving with respect to the surface.
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