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地面力學參數(shù)綜合測試系統(tǒng)設計與試驗
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國家自然科學基金項目(51575523)和軍內(nèi)科研項目


Design and Experiment of Integrated Test System for Terramechanics Parameters
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    摘要:

    為了改進貝氏儀不依賴大型設備時測試范圍的局限性和地面力學參數(shù)測試手段的分散多樣性,設計了一種室內(nèi)外兩用的地面力學參數(shù)綜合測試系統(tǒng)。測試系統(tǒng)貫入,、扭轉(zhuǎn)過程互不干涉,實現(xiàn)測試及數(shù)據(jù)處理的獨立性,。可選擇電動機驅(qū)動或手動驅(qū)動。借助絲杠升降機傳動,,儀器具有較高的運行控制精度和測試量程,。系統(tǒng)借助拉線位移傳感器和力、扭矩傳感器可實時同步獲取縱深行進動態(tài)信息,、土壤承壓力和土壤抗剪切力等信息,,可實現(xiàn)計算機遠程控制和數(shù)據(jù)采集記錄及處理自動化。實驗室壓實制備濕潤砂土,,通過剪切盤剪切試驗得砂土內(nèi)聚力為3.14kPa,,內(nèi)摩擦角為38.2°;通過壓板試驗得砂土變形指數(shù)為0.963,,粘聚變形模量為178.73kN/mn+1,,摩擦變形模量為11908.40kN/mn+2。試驗表明,,該儀器具有較高的可靠性和實用性,。

    Abstract:

    Soil compressive strength and shear strength are important problems in the field of agricultural engineering, and vehicle subsidence depth and driving resistance are closely related with soil pressure and shear properties. In order to improve the testing range of bevameter independent of large equipment and solve the dispersion and diversity of test methods about terramechanics parameters, a comprehensive tester of soil pressure, shear and adhesion both indoor and outdoor was designed. Penetration test was independent of torsion process and did not impact relatively, realizing the testing and data processing independently. Choosing the drive motor or manually driven by screw lift transmission, the test instrument can obtain high range and accurate operating control. The system with cable displacement sensor and force torque sensor can take real-time dynamic travel information about soil sinkage depth, soil shear strength, and soil resistance of bearing pressure and other information, realizing the automation of computer remote control and data acquisition and processing. Shearing tests of wet compacted sand got results that soil cohesion was 3.14kPa, internal friction angle was 38.2°;the plate loading test of wet compacted got results that the sand deformation index was 0.963, the cohesive deformation modulus was 178.73kN/mn+1 and friction deformation modulus was 11908.40kN/mn+2. The results showed that the comprehensive test instrument provided experimental basis and played a good effect on the research on load subsidence curve and shear stress distribution. Laboratory sand tests showed that the instrument had high reliability and practicability. The instrument met the requirements of test for a large range, multi dimension and unity of terramechanics parameters.

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汪偉,趙家豐,沈晨暉,張曉良.地面力學參數(shù)綜合測試系統(tǒng)設計與試驗[J].農(nóng)業(yè)機械學報,2017,48(5):72-78. WANG Wei, ZHAO Jiafeng, SHEN Chenhui, ZHANG Xiaoliang. Design and Experiment of Integrated Test System for Terramechanics Parameters[J]. Transactions of the Chinese Society for Agricultural Machinery,2017,48(5):72-78.

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  • 收稿日期:2016-09-18
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  • 在線發(fā)布日期: 2017-05-10
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