Downloaded from https://www.everyspec.com ./ METHOD 513.3 ACCELERATION I-1 -1-2 SECTION I PURPOSE . . . . . . . . . . . . . ENVIRONMENTAL EFFECTS . . . . . . GUIDELINES FOR DETERMINING TEST I a a2 . . . . . 513.3-1 . . . . .,513.3-1 I-3 PROCEDURES AND TEST CONDITIONS SPECIAL CONSIDERATIONS . . . REFERENCES . . . . . ... . . . ., SECTION II . . . . . 513.3-2 . . . . . 513.3-9 . . . . . 513.3-10 . I-4 I-5 II-1 II-2 II-3 II-4 APPARATUS . . . . . . . . . . . . PREPARATION FOR TEST . . . . . . PROCEDURES . . . . . . . . . . . INFORMATION TO BE RECORDED . . . . . . . . 513.3-11 . . . . . 513.3-11 . . . . . 513.3-13 . . . . . 513.3-13 SECTION I I-1 ~.
The acceleration test ia performed to assure that equipment can structurally withstand the g foroes that are expected to be induced by acceler- ation in the service environment, and function without degradation during and following exposure to these forces. 1-2 ~. Acceleration generally increases the forces acting on equipment and the hardware used to mount the equipment. An exception 18 acceleration that induces foroes in opposition to gravitation forces, in which case the equipment can approach or attain a atate of weightlessness and become reverse loaded in excess of the opposing gravitational forces. The forces induced by acceleration can cause: a.
Structural deflections that interfere wittiequipment operation. b. Permanent deformations and fracturea that disable or deetroy the equipment. ,. c. Broken faateners and mounting hardware that cause equipment to become loose projectiles. d. Electronic circuit boards to short out and circuits to open up. . e. Inductances and capacitances to change values. f. Relays to open or close. g. Actuators and other mechanisms to bind. h. Seals .toleak. i. Pressure and flow regulator to change value. METHOD 513.3 513.3-1 19 July 1983