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1、......大學(xué)畢業(yè)論文題目：土壤的物理機(jī)械性質(zhì)及其對(duì)車輛行駛性能的影響作者：學(xué)號(hào)：學(xué)院(系)：專業(yè)：指導(dǎo)教師：評(píng)閱人：學(xué)習(xí)好幫手......土壤的物理機(jī)械性質(zhì)及其對(duì)車輛行駛性能的影響中文摘要關(guān)鍵詞：土壤的物理機(jī)械性質(zhì)，車輪與地面相對(duì)滑動(dòng)，輪式車輛的牽引力土壤是工程機(jī)械的作業(yè)對(duì)象，又是其支承基礎(chǔ)。土壤的物理機(jī)械性質(zhì)直接影響工程機(jī)械的作業(yè)阻力、運(yùn)行阻力，牽引性能及運(yùn)行通過性。實(shí)際土壤是不同粒度土粒的混合物。不同粒度土粒的相對(duì)含量直接影響土壤的性質(zhì)。在車輪向前滾動(dòng)的過程中，除了直觀的向前運(yùn)行的滾動(dòng)之外，在車輪與地面的接觸區(qū)內(nèi)的各個(gè)接觸點(diǎn)還存在著不同程度的相對(duì)滑動(dòng)。通過輪與地
2、接觸面的摩擦產(chǎn)生驅(qū)動(dòng)力，以及車輪在各接觸點(diǎn)的徑向變形的差異是產(chǎn)生車輪與地面相對(duì)滑動(dòng)的基本原因。車輪與地面之間的相對(duì)滑動(dòng)不僅影響車輪的運(yùn)行速度，而且影響輪胎的磨損、能量消耗及整機(jī)的作業(yè)效率。驅(qū)動(dòng)輪滾動(dòng)過程中，即使＝1，即從驅(qū)動(dòng)輪整體而言，它作純滾動(dòng)，則輪一地接觸區(qū)內(nèi)其余各點(diǎn)，輪與地之間仍存在著相對(duì)滑動(dòng)，存在滑動(dòng)摩擦。輪一地接觸區(qū)內(nèi)各單元面積的滑動(dòng)摩擦力之總和就構(gòu)成了牽引力。學(xué)習(xí)好幫手......PhysicalandmechanicalpropertiesofthesoilanditseffectonvehicleperformanceAbstractKeyWords:P
3、hysicalandmechanicalpropertiesofthesoil，Relativeslidingwheelandtheground,WheeledvehicletractionSoilistheobjectofconstructionmachineryoperations,butalsothesupportingbase.Physicalandmechanicalpropertiesofthesoildirectlyaffectstheoperationofconstructionmachineryresistance,runningresistance,
4、tractionperformanceandrunthroughsex.Actualsoilisamixtureofdifferentsizesoilparticles.Therelativecontentofdifferentsizesoilparticlesdirectlyaffectthenatureofthesoil.Intheprocessofrollingthewheelforward,inadditiontointuitiveoperationofrollingforward,thewheelcontactwiththegroundineachregion
5、thereisstillapointofcontactvaryingdegreesofrelativesliding.Accessthroughthewheelandthedrivingforceofthefrictionsurface,andthewheelsatallcontactpointsbetweentheradialdeformationofthewheelandthegroundistoproducethebasicreasonfortherelativesliding.Wheelsandthegroundnotonlyaffecttherelatives
6、lidebetweenthewheelspeed,butalsoaffecttirewear,energyconsumptionandthemachine'soperatingefficiency.Wheelrollingprocess,evenif=1,fromthewheelthewhole,itisforpurerolling,thewheelofapointofcontactwiththerestoftheregion,betweenthewheelandtheground,therearestillsliding,thereisslidingfriction.
7、Roundaccesstotheregionofaunitareaoftheslidingfrictionofthetotalityoftraction.學(xué)習(xí)好幫手......目錄中文摘要IABSTRACTII1.土壤的物理機(jī)械性質(zhì)31.1.土壤的粒度組成31.2.土壤的含水量與塑性31.3.土壤的密度與重度....................................................................................................................4
