In most of the scenario, pure sinusoidal vibration is a rare phenomenon. In a wide variety of vibrations, some will be in pure form (random vibration/ sinusoidal vibration) and some may be combined. A much more common phenomenon is sinusoidal motion coupled with background random vibration signal by broad banded frequency range. The SoR vibration signals contains sine tones that are superimposed on a low level broadband random vibration. Some practical examples of SoR are vibration generated from helicopters, turbo-propeller airplanes, gas generators, rocket engine and aircraft rapid gun-fire events.

HCLTech CAE team supports various OEM’s in different sectors like Aerospace, Automobile, Industrial where the majority requests are for Finite Element Analysis of vibrational environment.Sine on Random approach in FEA is of utmost importance due to the following reasons:

• SoR loading analysis strategy is a better simulation of in-service environment: In real world scenario, Sine and random vibrations are occurring concurrently and this SoR loading input simulates this simultaneous vibrations action.
• Provides satisfactory results than single input modes: In conventional methodology, each load cases are tested individually and then results are compared/added. There shall be little compromise in results’ accuracy.
• Improve quality of work: SoR loading analysis strategy provides accuracy in results which increases the quality of work.
• Reduce in double design requirement testing: SoR loading analysis is a combined strategy in which testing on sine and random vibrational loads are performed by applying Sine and random vibrations’ load together and individual load testing are not required.

To achieve the aforementioned objectives, HCLTech CAE team performed different load combination methods to meet design requirements with acceptable results. Download whitepaper to know more.