Abstract
Ground pressure is a significant parameter for the mobility, tractive performance, and soil compaction. In this study, an analytical model for predicting ground pressure distribution under a rigid-flexible tracked vehicle on soft ground was developed. The model considered the primary design parameters of the tracked vehicle, soil characteristics, and soil shear. The ground pressure was not uniform, and its maximum values under the roadwheels were 90.20, 103.57, and 150.14 kPa. The ground pressure was inversely proportional to the ratio of the lengths of the flexible track and rigid grouser. An experiment was conducted to verify the analytical model. The maximum error between the measured and simulated results was smaller than 8%, thereby verifying the analytical model.
Highlights
Tracked vehicles have become increasingly popular in various complex terrain and special ground conditions, such as snow land, desert, swamps, jungles, mountains, and lakes, because of their high mobility
Measurements of Ground Pressure e analytical model was verified through the ground pressure test, which was conducted at the test site of Harbin First Machinery Building Group Ltd. e test vehicle with a total weight of 148.90 kN was driven at the speed of 10 km/h
To measure the ground pressure distribution below the roadwheels, two stress sensors were buried in the e calculation error between the simulation and measure was smaller than 10 kPa, and the maximum error was smaller than 8%
Summary
Tracked vehicles have become increasingly popular in various complex terrain and special ground conditions, such as snow land, desert, swamps, jungles, mountains, and lakes, because of their high mobility. Garber and Wong [9, 10] developed an analytical method for predicting ground pressure under a tracked vehicle in a static condition by considering the vehicle parameters and soil characteristics. Park et al [11] introduced a mathematical model for predicting soil normal and shear stresses under a flexible tracked vehicle by considering the vehicle parameters and soil characteristics and the repetitive loading. (i) To develop a mathematical model for predicting ground pressure along the longitudinal direction by using the primary design parameters of the tracked vehicle, as well as the soil characteristics and soil shear, and assuming a uniform ground pressure along the lateral direction (ii) To conduct an experiment that verifies and validates the theoretical model (iii) To analyze the influence of the lengths of the flexible track and rigid grouser on the ground pressure
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