Dynamic properties of screw-bolts connections of sowing machine

Threaded connections (TC) are extensively used in the transport industry. They are easy to implement, cost effective. Accidents caused by weakening of threaded joints are typical. For example, the collapse of the car body can be caused by the weakening of the bolts. A vehicle is a complicated system under the infl uence of vibration caused by an inequality of the road surface, variable speed, unbalance of the rotating elements. These vibrations are distributed through the vehicle and also affect the connection. Under their action, these compounds gradually begin to weaken. This can lead to serious accidents. The main factors infl uencing the relaxation of TC are the amplitude, frequency and gradient of vibration. For their determination it is necessary to clarify the picture of the propagation of vibration in the vehicle, especially the process of its transmission from the wheels to the sensitive element – the connection.