Impact of the ship hull geometry on sinkage - ScienceDirect
2022年12月15日 · The present paper aims to study the effect of ship hull geometry on sinkage by broadening the sinkage data from those internal actions and reports from CEHINAV by using a higher number of models – 12 ship models – and real ship models instead of theoretical models than in prior publications (Pérez-Rojas et al., 2019). 2. Materials and methods
Sinkage and trim of two ships passing each other on parallel …
2009年10月1日 · Bow sinkage reaches a maximum just before the midships cross, while stern sinkage reaches a maximum just after the midships cross. The maximum increase above steady-state values is similar for both bow and stern sinkage, so the point on the ship most likely to ground will normally be that with the largest dynamic draft at steady state (in this ...
Practical evaluation of sinkage and trim effects on the drag of a ...
2017年4月1日 · However, the sinkage and the trim, and their influence on the drag, increase rapidly for 0.25 < F, and are notable for the highest value F = 0.45 of the range 0.1 ≤ F ≤ 0.45 considered here. E.g., at F = 0.45, the Wigley hull and the S60 model are found to experience an increase in drag of about 15%, and the drag of the DTMB5415 model is ...
Tire sinkage measurement and entry angle calculation using stereo ...
Tire sinkage is very important when it comes to terrain-vehicle interaction. The slip-sinkage relationship is an important factor in tractive performance. This paper is part of a larger project that is working on autonomy in conditions with deformable terrain and this paper presents on the methods employed to measure and find important values ...
Integration soil contact model – A flexible pressure-sinkage …
For the pressure-sinkage function p(z) the only limitation is that it has to be defined for all sinkage values z, in an interval [0, z max], where z max is an user defined maximum sinkage. In the case of the external data set, there are no limitations. However, in this case the maximum sinkage is defined by the maximum depth of the input data set.
Sinkage - an overview | ScienceDirect Topics
2010年2月17日 · Beyond the critical sinkage, the resistance to penetration of the muskeg at Site A decreased, as the load was mainly carried by the underlying peat which had a relatively low bearing strength. The pressure–sinkage curves of the muskeg shown in the figures are similar to those obtained in Michigan by Niemi and Bayer and reported by Bekker (1969).
Piecewise model of track sinkage based on underwater cohesive soil
2022年10月1日 · The pressure-sinkage test data was fitted with a piecewise model which can more accurately describe the trend of the pressure-sinkage curve, as shown in Fig. 4. According to the pressure-sinkage test, when the river floor soil is compressed to a certain value, the pressure-sinkage curve conforms to the empirical model.
Finite element simulation of plate sinkage, confined and semi …
2018年6月1日 · The plate sinkage test (PST) is the most used procedure to evaluate the soil compactibility in-situ. In terrain-vehicle mechanics, PST has been used as a first step towards a comprehensive set of soil-vehicle relationships which can handle traction elements (Earl and Alexandrou, 2001a). The compaction behavior of soil under plate sinkage ...
Simulation of plate sinkage in soil using discrete element …
2020年9月1日 · Stress-sinkage relationship as functions of interaction properties i.e. the internal coefficient of friction, coefficient of restitution and coefficient of rolling friction are shown in Fig. 5 c–e, respectively. Increasing the internal coefficient of friction from 0.1 to 0.9 remarkably increased the stress.
Lateral slide sinkage tests for a tire and a track shoe
2010年12月1日 · Slide sinkage started when the lateral displacement was applied. Slide sinkage is the additional sinkage due to the lateral force and displacement. Fig. 10 shows the relationship between lateral force and slide sinkage for the tire. It appears that under the same lateral force, lower normal forces have deeper slide sinkage.