TABLE OF CONTENTS Accelerated vibration testing can be used as one of the components (Figure 2.7) of accelerated mechanical testing, which is a unit of accelerated reliability testing, as well as an independent type of accelerated testing. It depends on the goal of testing. This type of testing goes as far back as 1915 [1].
The equipment for vibration accelerated testing must be accurate in order to simulate real life input influences on the actual product. This is one of the basic criteria for the use and development of the above equipment as a component of accelerated reliability testing.
The vibration of a product is an output parameter. The input influences for mobile products shown in Figure 2.34 consist of the features of the road (type of road, profile, density, hardness, moisture, etc.), design and quality of the wheels, coupling of the wheels with the surface of the road, stability of the surface due to weather changes, speed of test subject's movements, speed and direction of the wind, etc. The types of road may be concrete, asphalt, cobblestone, or dirt road, etc. Most of these surface influences have a random character and are related to each other. This influences the stiffness, inertia, elastic, and damper qualities of the product. The result of this interconnection is vibration of a mobile product on a particular surface, under specified conditions. Therefore, the mobile product should be treated as a dynamic system which vibrates as a...
