DLoG DLoG X 10, Руководство пользователя

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Appendix C: Mechanical dynamic loading
132 Manual DLoG X Series
21.2. Using the device without vibration insulation
(tuned to a high frequency)
Selection criteria: stationary, limitedly mobile or fully mobile applications for which
components offering insulation against vibrations cannot be used or are not required.
The DLoG X system can vibrate and should therefore be installed
as rigidly as possible.
With their variable mountings, the DLoG X models form a spring-mass system that can
result in excitation by one or more random vibrations or shocks from its environment.
The system reacts with natural oscillations, the amplitudes of which can be up to 20
times greater than the excitation amplitudes (resonance effects). The goal is therefore to
remove resonance points of this kind or at least to tune the system to such a high
frequency that they fall within the range of low excitation amplitudes.
For an initial assessment, you can test the device by hand. Bring the system to excitation
by gently hitting it with your hand. If the DLoG X device vibrates noticably and for an
extended period, then the natural frequencyis probably too low. In this case, we
recommend reinforcing the fixing points to the maximum bending moment (through the
use of rigid sections, for example).
Practically speaking, natural frequencies above 100 Hz are sufficient. However, natural
frequencies below 50 Hz are likely to lead to damaging amplitudes during resonance. As
a result, fatigue fractures may occur along the outer mounting parts or on the internal
electronic components. It is also possible that connections become unplugged.