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In the automotive and general industries

Update:15 Feb 2019

In the automotive and general industries, rotary mechan […]

In the automotive and general industries, rotary mechanical analysis is the focus of structural improvements, enabling engineers to track gearbox, transfer systems and bearing failures.

Every rotating component in the mechanical device generates vibration, which causes noise, resulting in a broken balance or unsmooth component transmission. In addition, there is also a so-called "blade passage" phenomenon, which is related to the number of fan blades and the pump. In each case, we can correlate the frequency of the vibration with the speed of the machine. For example, a fan-like structure with five blades with equal spatial angular distribution will generate noise at 5 times the rotational speed, sometimes at a higher multiple of the rotational speed, such as 10 times, 15 times, etc., depending on the appropriate The number of fan supports in position. If these supports are close to the blade, the frequency will become the product of the number of blades and the number of supports.

These vibrations act as incentives for mechanical equipment or vehicles. The most severe effect occurs when the excitation frequency produced by the rotating component matches a certain natural frequency of the structure. These "consistent" frequencies are often the goal of the design department to limit these effects, whether they are fatigue, vibration or corresponding noise.

For machines with varying speeds, the challenge is greater in order to reduce the acceptable magnitude of vibration noise. Rotating components typically deliver more power (or energy), and unfortunately, even small amounts of power (or function) can be converted into vibrational noise, which can cause adverse reactions.