# Home > Measuring-Instruments > Vibration Measurement Instruments

[ pdf ] VIBRATION TESTING

``` Download 117 times Topic under  Vibration Measurement Instruments Source: www.ista.org  File size: 42.51 KB File type: pdf Last download on: Sat Mar 25, 2017 02:55:53 PM Short Desciption: ABSTRACT How many hours of vibration testing equals how many miles (or kilometers) of transport? A simple question, but unfortunately the answer is neither simple nor straightforward. This paper examines the factors involved in attempting to construct such an equivalence, explains the methodology behind an accepted and proven approach, and discusses the issue of accelerated (time-compressed) vibration simulation in detail. Summary: Vibration Tests There are three categories of commonly-used tests in the transport packaging field. First is the “fixed-displacement” test, also known as a repetitive shock or “bounce” test, in accordance with ASTM D999 Method A1 or A21 or similar. In this test, the specimen is placed on the table of a machine which moves with a constant one inch (25 mm) displacement, either linearly or in a circular motion. The test is usually conducted at a frequency (typically around 4.5 Hz.) where the specimen just begins to intermittently leave the table surface, as evidenced by the ability to insert a thin shim under it. Technically this is not vibration at all; the motion causes a small shock or “bounce” each time the package re-contacts the table. This test is not a simulation of actual transport – although there may be “bouncing” of packages in transport vehicles, it is not at a constant frequency and amplitude. Bookmark or share this info on Google+ and leave comment at below : ``` ``` ```

``` ```

``` People who downloaded this also viewed in this sites: ```

Basic Vibration Isolation Theory
The object of the following is to acquaint the user with the principles and I terminology encountered in analyzing basic vibratory systems....

Torsional Vibration of Turbo-Machinery
Torsional Vibration of Turbo-Machinery By Duncan Walker * Publisher: McGraw-Hill Professional * Number Of Pages: 189 *...

Vibration Isolation Terminology
The isolation of machinery to prevent the transmission of vibration and noise has become one of the important phases of modern building engineering....

``` Leave comment :"VIBRATION TESTING" ```

``` Name* Comment ```

``` Related Free Files ```

``` Basic Vibration Isolation Theory... - Download: 109 timesVibration Isolation Terminology... - Download: 63 timesUFC 3-450-01 Noise and Vibration Control... - Download: 240 timesTHEORY OF VIBRATION ISOLATION... - Download: 137 timesTorsional Vibration of Turbo-Machinery ... - Download: 429 times ```

1
at 0 : 23 : 58 ago
Topic: Electronics Systems

2
at 0 : 26 : 34 ago
Topic: PLC (Programmable Logic Controller)

3
at 0 : 42 : 23 ago
Topic: Measurement Engineering

4
at 0 : 48 : 20 ago
Topic: PLC (Programmable Logic Controller)

5
at 0 : 58 : 46 ago
Topic: Hydraulic Systems

6
at 0 : 59 : 2 ago
Topic: Electrical Systems

7
at 0 : 59 : 38 ago
Topic: Machine Control

8
at 1 : 2 : 0 ago
Topic: CNC

9
at 1 : 3 : 1 ago
Topic: Electronics Systems

10
at 1 : 3 : 40 ago
Topic: Process Control

11
at 1 : 6 : 30 ago
Topic: Cables Terminations

12
at 1 : 6 : 36 ago
Topic: Cables Terminations

13
at 1 : 6 : 40 ago
Topic: Cables Terminations

14
at 1 : 6 : 43 ago
Topic: Cables Terminations

15
at 1 : 7 : 14 ago
Topic: Cables Terminations