ASTM D4728 PDF

ASTM D Standard Test Method for Random Vibration Testing of Shipping Containers has been released. It revises and replaces the. This standard is issued under the fixed designation D ; the number immediately 1 This test method is under the jurisdiction of ASTM Committee D10 on. ASTM D Standard Test Method for Random Vibration Testing of Shipping Containers.

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Typical systems include an analog to digital converter for conditioning feedback signals, a digital to analog converter to produce drive signals, a digital processor with real time analysis capability, random vibration control software programs, a graphics display terminal, printer, and a data storage unit.

Design modification to one or all of these components may be used to achieve d478 performance in the shipping environment.

ASTM-D – Medical Package Testing

If a dummy load is used, an assessment must be made, after the test is completed, as aastm whether or not the actual test item would have passed or failed. Stop the test immediately if a dangerous condition should develop.

However, different test levels may be utilized for each axis depending on the field environment that is to be simulated. For more information visit www. This standard is subject to revision at any time by the responsible technical committee and must astj reviewed every?

ASTM-D4728

Sources of supplementary information are listed in the Reference section 1- Therefore, unrealistic fatigue damage d47728 to resonance buildup is minimized. The controller automatically generates equalized vibration test system drive signals to achieve the desired PSD thus maintaining closed loop control.

This enables the closed loop control system to complete its equalization at lower test levels and provides the operator adequate opportunity to visually verify that the test specimen and? Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Therefore, unrealistic fatigue damage due to resonance buildup is minimized.

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They do not purport to accurately describe a speci?

The vibration table shall be supported by a mechanism capable of producing single axis vibration inputs at controlled levels of continuously variable amplitude throughout the desired range of frequencies. Approximating the actual damage, or lack of damage, experienced in real life may require subjecting the container and its contents to random vibration tests. In terms of a vibration system, it is the ratio of output response to a constant input over a de? NOTE 2—Random vibration systems typically create a drive signal that follows the Gaussian distribution.

When the specimen is not secured to the table, restraining devices should be attached to the vibration table to prevent potential movement of the specimen off the vibration table. In this way, many product and container resonances are simultaneously excited.

It is the responsibility of the user of this standard to ast appropriate safety, health and atsm practices and determine the applicability of regulatory limitations prior to use. When possible, confidence levels may be improved by comparing laboratory test results with actual field shipment effects.

Vibration exposure affects the shipping container, its interior packing, means of closure, and contents. Instrumentation may also be desirable for monitoring the response of the test specimen s. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. Design modification to one or all of these components may be used to achieve optimum performance in the shipping environment.

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Two PSD levels that have a ratio of 0. See Appendix X1 and Appendix X2 for related information. Therefore, control analysis based on monitoring table motion rather than actual package response is recommended. However, different test levels may be utilized for each axis depending on the?

Two PSD levels that have a ratio of 2. Random aztm may be conducted in any axis vertical or horizontal or in any package orientation. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

Current dd4728 approved Oct. Unit loads, stacked columns, or single units should be allowed to vibrate freely unless they will actually be securely fastened during shipment, crates on a?

ASTM D – 17 Standard Test Method for Random Vibration Testing of Shipping Containers

See Appendix X1 and Appendix X2 for related information. When it is necessary to observe the contents during the test, holes may be cut in noncritical areas of the container.

Specific safety hazard statements are given in Section 6.

Such tests may be used to assess the performance of a container with its interior packing and means of closure in terms of its ruggedness and the protection that it provides the contents when subjected to random vibration inputs. Last previous edition approved in as D —