Generally, vibrations with large amplitudes in the transport and repetition frequencies lower than the natural frequency of the lowest damping of the vehicle, the transmission and the product are called shocks. From the point of view of the total time of the vehicle transportation process, this impact does not occupy an important proportion, and the amount of vibrational acceleration in the effective value is also very small, that is, it does not essentially change the assumption of stability in the transportation process. However, its magnitude is larger and can produce a stress in the vehicle and the products it transports that exceeds its allowable level, causing temporary or permanent damage to the vehicle or product. The most obvious example is the impact of a vehicle passing through a pit on a road, crossing a railroad, or a fall in handling. Measurements have shown that the factors that determine the potential energy for impact damage are impacts of long duration and large amplitude. In other words, the speed of the shock pulse rises to some extent determines the potential energy of the shock damage. Since the vehicle and the product fastened on it constitute a complex vibration system, forced vibration is caused when the vehicle and the road are resonated, and the vehicle or the product also generates high stress, which may exceed the allowable stress of the vehicle or the product under certain conditions and cause damage. This situation should be distinguished from the impact, but the transport process is more continuous and low-overload and stable random vibration. Therefore, the product transportation test is also a kind of random vibration test with low overload for a long time. The damage caused by this is fatigue failure. For the above two environments, the entire transportation process exists at the same time. However, due to the different focus on different requirements of the product, there are different approaches. For civilian products, because of their versatility and breadth, it is always unavoidable that they are subject to transient large overload shocks in the transportation process, and are generally considered to be the main factor causing product damage during the transportation process. Therefore, the impulse response time curve is taken as the original basis for the transport simulation. For military products, due to their special and specific nature, various effective measures must be taken in the transportation process to avoid the occurrence of large overloaded impact environments. It is generally believed that the long-term random vibration of low overload is the main factor causing product damage during the transportation process. Reactive Dyes Printing Thickener
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