Vibration isolation analysis of tubular sandwiched structure used for trackless rubber-tyred vehicles
In this article, a kind of tubular sandwiched engine mount (TSEM) was first used in the trackless rubber-tyred vehicles (TRTVs). TRTV have been playing an important role in underground mining. However, during the working of TRTV, the vibrations are always violent and these vibrations are very harmful. Therefore, reducing the vibration of TRTV has become an urgent and important matter. The TSEM was made of three layers, that is, the external layer, the internal layer and the middle layer. The finite element analysis (FEA) was carried out to find out whether the deformation of TSEM could meet the design requirements. To grasp the vibration isolation feature of the TSEM, the tests were performed under two working conditions of TRTVs. The results show that the rear engine mounts could always get good vibration-reducing performance, whereas the performance of the front mounts is sometimes poor in a certain direction, that is, perhaps owing to the vibration energy coupling in different directions. In addition, the vibration of the seat was measured. The test results show that the vertical acceleration is reduced when the vehicle is installed with the TSEM, compared with that of the seat when the vehicle is equipped with the existing old mounts. The results in this article could provide a good reference for the application of the tubular sandwiched structure in different rubber-tyred vehicles.