Sine-on-random vibration testing Introduction In nature, purely sinusoidal vibra tion is a rare phenomenon. applicable to standardized tests, such as sine dwell/sweep, random vibration, or shock response. Some examples of SoR vibration are from helicopters, propeller driven airplanes and aircraft rapid gun-fire events. Sine-on-Random (SoR) vibration testing contains sine tones that are superimposed on a low level of broadband random vibration. It attempts to capture the essence of the service vibration environment for a product and reproduce a similar environment in the test lab. on the differences between sinusoidal vibration (sine testing) and random vibration testing. Because random is statistical in nature, these high sigma peaks could have a narrow width or wide width, effectively negating capacitance gains. Random vibration testing as used today is largely unchanged in technique since it was introduced in the early 1950s. These frequency domain definitions may be the only available definition of the actual environment. sine and random vibe don't really go together from my experience. Conservatively, this peak acceleration value should be compared with the armature sine acceleration limits. The simple structure consisted of a lumped mass mounted on the end of a short rectangular beam. A much more common phenomenon is sinusoi dal motion coupled with background random motion having a broadbanded frequency range. The sine tones can be fixed frequency or sweeping. Analysis methods have been developed and are in common use for each of these excitation types. However, sine tests still have an important role in lab BSR testing since they are quite useful for diagnostic work. Random vibration experiments were performed on a simple structure to compare the response to single axis inputs and multiple axis inputs. The experiments were performed on a six degree of freedom (6-DOF) electrodynamic shaker described in a companion paper . Sine vibration is simple and easy to understand (compared to random vibration) but sine vibration is not realistic as compared to the vibration that occurs on the real test track or road surface. The simplest approach is to evaluate the acceleration peaks at the sigma value times the rms acceleration level. Consequently, in vi bration testing, it is becoming increas ingly popular to use a test based on a sinewave superimposed on a random waveform - sine … If they are sweeping, they are normally very narrow frequency bands. Strike a tuning fork and the sound you hear is the result of a single sinusoidal wave produced at a particular frequency as shown in Figure 1. Random vibration testing. if you dont' have that license, drop me a line at firstname.lastname@example.org , we can help you with that analysis. The simplest musical tones are sine waves at particular frequencies. but anthony is right, if you have a dynamic analysis, you need a higher level of solidworks, solidworsk premium. Test specifications can be established from real environment measurements using an ASD envelope or a fatigue damage equivalence criterion (Extreme response spectrum and Fatigue damage spectrum).Random vibration testing is one of the more common types of vibration testing services performed by vibration test labs.