Dynamic mechanism of tracked soil of deep-sea mining vehicle based on dis-crete element method
In order to solve the problem that the deep-sea mining vehicle was difficult to drive on soft soil,the simulated bottom soil was prepared for direct shear test,and the discrete element soil simulation compression and shear test was established.The reliability of discrete element simulation of bottom soil was verified.The crawler-soil interaction system was constructed to analyze the influ-ence of the length-width ratio of the crawler grounding and the number of supporting wheels on the grounding pressure and soil set-tlement under the center of gravity offset of the mining vehicle.The results showed that with the increase of the length-width ratio of the track grounding under the center of gravity offset,the eccentricity effect was more significant,the initial grounding pressure dis-tribution of the track was uneven,and the overall settlement of the track increased,but it had no obvious effect on the trapezoidal uneven settlement form of the track.When the number of supporting wheels n≤3,increasing the number of supporting wheels could appropriately reduce the eccentricity effect,and the uneven distribution of the initial grounding pressure of the track was obvious,which reduced the overall settlement of the track.When n＞3,the change of the number of supporting wheels had little effect on the eccentricity effect,and the initial grounding pressure distribution of the track was gradually uniform,but it had no obvious effect on the overall settlement of the track.The relationship between the length-width ratio of different track grounding and the number of supporting wheels approximately conformed to the Bekker formula.
deep-sea crawler harvestertrack grounding pressuresoil settlementpressure subsidence relationshipBekker collapsi-ble model
NETL
NSTL
万方数据
