To begin discussing engine isolation, a little background is needed to properly understand the goals to be met. Vibration isolation is achieved by interrupting the path of disturbing vibrations through the use of a resilient mounting system. The concept can be generalized by looking at a simple single degree of freedom system, shown in the figure 2.1.

The equation of motion for this system is given as:

where F is the disturbing force. (2.1)

If damping is assumed to be negligible, the natural frequency of

What to look for in these results are the levels of isolation at the expected disturbing frequencies, and the amount of coupling in the system. The vertical natural frequency (mode at which vertical motion is greatest) and the roll natural frequency (mode at which roll motion is greatest) are typically the most important to examine. Since the primary goal is to isolate the torsional forces created by piston firing at the firing frequency, the roll natural frequency must be low enough to provide adequate isolation. The degree of isolation can be estimated using the following equation.

Natural Freq. (Hz) Vertical Front-Back Side-Side Yaw Roll Pitch

Some topics in this essay:
, Mount Information, Mounting Locations, Roll Pitch, Vibration Engines, Operating Conditions, Analysis Output, Conclusions Designing, Equipment Information, Required Information, natural frequencies, natural frequency, engine isolation, mounting system, mounting locations, loading conditions, degree freedom, six degree freedom, „h determine, center gravity, system natural, system natural frequencies, natural frequency mode, degree freedom analysis, principal inertial axes,