ASTM D 4728 PDF

ASTM D stands for random vibration testing of shipping containers. Random vibration testing is the most accurate simulation available for simulating vibrations occurring during the actual distribution and transportation. Vibrations are randomly applied to the test load with frequencies and intensities that are representative of actual distribution environments. Using a servo-hydraulic system, we program the power spectral density PSD simulating the vibration profile corresponding to the type of transportation mode you use. The vibration frequencies used range from 0 to Hz.

Author:Malami Araran
Country:Guinea
Language:English (Spanish)
Genre:Automotive
Published (Last):14 November 2014
Pages:362
PDF File Size:2.12 Mb
ePub File Size:17.69 Mb
ISBN:537-3-23374-748-3
Downloads:78324
Price:Free* [*Free Regsitration Required]
Uploader:Shaktigul



Shipping containers are exposed to complex dynamic stresses in the distribution environment. 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 this way, ASTM-D standard test method for random vibration testing of shipping containers simultaneously excite many product and container resonances. Resonance buildups during random vibration tests are less intense than during sinusoidal resonance dwell or sweep tests.

Therefore, unrealistic fatigue damage due to resonance buildup is minimized. Random vibration tests should be based on representative field data. 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. This test allows analysis of the interaction between these components.

Design modification to one or all of these components may be used to achieve optimum performance in the shipping environment. Random vibration tests may be simultaneously performed with transient or periodic data to simulate known stresses of this type, that is, rail joints, pot holes, etc. Random vibration may be conducted in any axis vertical or horizontal or in any package orientation. However, different test levels may be utilized for each axis depending on the field environment that is to be simulated.

Scope 1. 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.

CANCIONERO NAVIDAD CON VASTAGO PDF

ASTM D4728

Active view current version of standard. Other Historical Standards. More D 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. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2SC3320 DATASHEET PDF

ASTM-D4728

Throughout the distribution cycle, containers are subjected to a number of forces that can compromise their protective ability , such as random vibrations. The ASTM D — 17 aims to prevent this problem in order to design effective systems that guarantee the safety of transported loads. To this end, the ASTM D standard outlines the performance of vibration testing on a shipping container with the purpose of testing the way in which it reacts to this force. By applying a random vibration to a container, its internal packaging and sealing, it is possible to evaluate its performance in regard to resistance and protection. By performing random vibration testing standards it is possible to simulate the vibrations that take place during the distribution cycle.

ELEMENTARY COLLEGE GEOMETRY AFRICK PDF

ASTM D4728: everything about it

Creating a Random Vibr Random Vibration. A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. Scope 1.

Related Articles