The basic information required to conduct a vibration test is listed below: Know what structural mode shapes will be present in testing your new item, Know what “G” level amplitude you anticipate measuring, Know what environmental conditions the test will be conducted within, Select the correct sensor technologies to use in your test program, Determine the most useful style of sensor mounting and cable routing to use, Know what methods of data acquisition and data reduction will be used. The test facility for Procedure III requires test surfaces and vehicles that represent transportation. Vibration is most commonly measured using a ceramic piezoelectric sensor or accelerometer. This test will determine reliability of the tested specimen and ensure it will operate as intended in real-world situations. Carrying vehicles include trucks, trailers, or tracked vehicles and is not secured to the carrying vehicle. This procedure is directly from MIL-STD 810H, but is accurate for previous versions including MIL-810G vibration. Beginning Vibration Analysis Connection Technology Center, Inc. 7939 Rae Boulevard Victor, New York 14564 www.ctconline.com There have been several versions of vibration testing procedures in MIL-STD-810 vibration testing. In this test, the cargo is free to bounce, scuff and collide with other cargo, and the sides of the vehicle. Generally, measured vibration data is not used to define this test, but it is often acquired during this test. windowHref += '? Stacking or bundling of sets or groups of material items may affect the vibration transmitted to individual items. The basic information required to conduct a vibration test is listed below: Know what structural mode shapes will be present in testing your new itemKnow what frequency range  you anticipate  measuringKnow what “G” level amplitude you anticipate measuringKnow what environmental conditions the test will be conducted withinSelect the correct sensor technologies to use in your test programDetermine the most useful style of sensor mounting and cable routing to useKnow what methods of data acquisition and data reduction will be usedPrepare your individual measurement system components to be clean, neat, orderly and ready for installation. Get Started Package testing or packaging testing involves the measurement of a characteristic or property involved with packaging.This includes packaging materials, packaging components, primary packages, shipping containers, and unit loads, as well as the associated processes. Octave and fractional octave bands have been used for several decades now in the characterization of acoustic energy in various applications. Acoustic Testing. > -1) { } else { They may also represent service phases of the environmental life cycle. } Ensure the test item configuration includes appropriate numbers and groupings of items. For best results, ensure the package tester is large enough to accommodate the dimensions and weight of specific test items. VIBRATION ANALYSIS PROCEDURE A vibratory system is a dynamic one for which the variables such as the excitations (inputs) and responses (outputs) are time dependent. The test severity is not tailorable, and represents loose cargo transport in military vehicles traversing rough terrain. The Test Procedure and Setup section is divided into eight categories: sensor calibration, preliminary equipment setup, equipment changes, excitation frequency determination, node layout, Maxwell’s Reciprocity Theorem test, final ground vibration test, and I-DEAS procedure. This is commonly done using either impact hammer testing or shaker testing. Shakers are chosen based on the size and mass of test items and fixtures. This procedure assumes no relative motion between the vehicle cargo deck, or cargo compartment and the cargo. document.addEventListener('DOMContentLoaded', function() { Other configuration modifications of the shipment are also considered. The most realistic alternative for truck, trailer, or other ground transportation requires the transportation vehicle and a full cargo load. A structural vibration test on a new design is the premise of the test we are discussing. 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