1、 本科毕业设计 (外文翻译 ) 具有 非光滑特性 的 仿生推土机 刮板 对土壤阻力减 小的 影响 Effects of non-smooth characteristics on bionic bulldozer blades in resistance reduction against soil Effects of non-smooth characteristics on bionic bulldozer blades in resistance reduction against soil Abstract The phenomenon of soil adhesion occurs
2、 widely when terrain machines and construction machines work； this adhesion increases their working resistance. Bionics is one of the most effective methods to reduce resistance against soil. Several non-smooth convex form bulldozer blades were tested to study the effects of non-smooth characteristi
3、cs on resistance reduction against soil. Under the same soil and test conditions, the draft forces of different non-smooth samples were obtained, and were lower than those of smooth samples. The sample with largest convex base diameter had the lowest draft force. The experiments with smooth and non-
4、smooth samples were repeated to observe soil adhesion and test resistance. A minimum amount of soil adhered to the surface of the non-smooth sample, and the draft force varied smoothly. The smooth sample was different in soil adhesion and draft force. Author Keywords: Non-smooth characteristics； Bio
5、nic bulldozer blades； Resistance reduction Article Outline 1. Introduction 2. Experimental details 2.1. The bulldozer blade samples 2.2. The tested soil 2.3. The equipments and conditions 3. Results and discussions 3.1. Effects of the number of the non-smooth convexes 3.2. Effects of the base diamet
6、er of the non-smooth convexes 3.3. Effects of the distribution of the non-smooth convex 3.4. Effects of the height of the non-smooth convexes 3.5. Effects of experimental times on soil adhesion and forces 4. Concluding remarks Acknowledgements References 1. Introduction The phenomenon of soil adhesi
7、on occurs widely when terrain machines and construction machines work； this adhesion increases their working resistance and energy consumption and decreases their qualities. Many methods, such as materials modification, surface shape design, vibration, lubrication, electric-osmosis and magnetization
8、, were adopted to reduce the soil adhesion force between soil and the surface of soil-engaging components. Some research conducted found that polymeric materials and enamel coating had the ability to reduce soil adhesion 6, 12, 13, 14 and 17, but the polymeric materials had poor abrasion resistance
9、against soil. The surface shapes of the soil-engaging components played an important role in reducing soil adhesion and friction. A kind of comet-type passage-holes mouldboard was made to reduce the plowing resistance 19. Ultrasonic vibration and mechanical vibration experiments were conducted, indi
10、cating the reduction of soil adhesion and soil friction resistance due to vibration 16 and 18. Araya and Kawanishi, Schafer and others reported that the air-flow, water and polymer-water solution injected in between soil and the surface of soil-engaging components had a lubrication action and decrea
11、sed the draft forces of soil-engaging equipment 1 and 15. The electro-osmosis method was adopted to reduce soil adhesion and sliding resistance, but a long contacting time for electro-osmosis required a limited application of the electric-osmosis method 2 and 3. Han and Zhang et al, studied the effe
12、ct of the magnetic field on the plowing resistance of plows. They reported that the plowshare with attached permanent magnets on the back had lower plowing resistance and fuel oil consumption of the tractors used for dragging plows than that of the plow without magnetizing 4 and 5. The problem of so
13、il adhesion has been solved in some soil-burrowing animals such as dung beetle, ant, and pangolin. Some research has shown that some parts of their body surfaces were a kind of geometrical non-smooth structure. The non-smooth structure was one of reasons why soil-burrowing animals do not stick soil. Fig. 1 illustrates the
