本文選題：工程車輛 + 垂直振動��； 參考：《吉林大學》2017年碩士論文

【摘要】：工程車輛作為礦山、水利、道路橋梁和城市現(xiàn)代化建設(shè)中主要的裝備,在國民經(jīng)濟發(fā)展中占有至關(guān)重要地位。工程車輛屬于非道路車輛,其工作環(huán)境較為惡劣,地面狀況復(fù)雜,駕駛?cè)藛T在工作中受到車輛傳遞的載荷沖擊大,振動劇烈。而工程車輛垂向振動作為一種主要的振動來源,不僅會對駕駛員造成生理和心理上不適,影響工作效率和安全,而且對長期駕駛工程車輛的人員會造成身體脊椎等部位的危害,嚴重影響駕駛員的身體健康。論文結(jié)合國家自然科學基金項目“工程機械座椅系統(tǒng)多維非線性隔振技術(shù)研究”,對工程車輛座椅垂直振動及其對人體影響進行理論和試驗研究。根據(jù)國際標準ISO2631中關(guān)于人體承受全身振動研究成果及評價,以及工程車輛實際工況,建立工程車輛工作環(huán)境下,人體振動評價體系及人體損傷標準。根據(jù)評價振動座椅國際標準ISO 7096:2000《土方機械司機座椅振動的試驗室評價》以及我國標準化委員會頒發(fā)的GB/T 8419-2007和GB/T 18707.1-2002/ISO 10326:1992《機械振動評價車輛座椅振動的試驗室方法》等相關(guān)標準,設(shè)計制造可以實現(xiàn)工程車輛座椅在試驗室環(huán)境中進行試驗的振動試驗平臺。建立了坐姿人體兩自由度、三自由度和四自由度動力學模型,結(jié)合假人模型和振動試驗方法,推導(dǎo)了不同自由度模型的視在質(zhì)量、驅(qū)動點機械阻抗以及頭部-座椅傳遞函數(shù),結(jié)合限寬白噪聲激勵下假人垂直振動試驗,可以求解得到假人垂直振動模型中的參數(shù)。利用座椅振動試驗平臺對假人進行模擬工程車輛實際工況垂直振動試驗。根據(jù)國際標準ISO 7096:2000和國家標準GB/T 8419-2007關(guān)于各類工程車輛座椅輸入振動分類及規(guī)定,對座椅施加不同譜類垂直方向激勵信號模擬履帶式推土機、裝載機以及鏟運機等工況,通過安裝于假人頭部和腰部的加速度傳感器,以及座椅面?zhèn)鞲衅鳈z測人體模型各部位響應(yīng),得到了工程車輛典型工況下人體振動情況,并對舒適性進行了評價。本文對工程車輛座椅垂直振動及其對人體影響的試驗研究工作,為工程車輛舒適性設(shè)計和評價提供了參考。
[Abstract]:As the main equipment of mine, water conservancy, road bridge and city modernization, engineering vehicle plays an important role in the development of national economy. Engineering vehicle belongs to non-road vehicle, its working environment is relatively bad, the ground condition is complex, the driver is greatly impacted by the load transmitted by the vehicle in the work, and the vibration is violent. As a main source of vibration, the vertical vibration of engineering vehicles will not only cause physical and psychological discomfort to the driver, affect the efficiency and safety of work, but also cause harm to the person driving the engineering vehicle for a long time, such as the body, spine, etc. The driver's health is seriously affected. Based on the project of National Natural Science Foundation of China "Multi-dimensional nonlinear Vibration isolation Technology of Construction Machinery seat system", this paper makes theoretical and experimental research on vertical vibration of seat and its influence on human body of engineering vehicle. According to the research results and evaluation of human body bearing whole body vibration in international standard ISO2631, and the actual working condition of engineering vehicle, the evaluation system of human body vibration and the standard of human body damage under the working environment of engineering vehicle are established. According to ISO 7096: 2000, "Laboratory Evaluation of seat Vibration of Earth-moving Machinery drivers" and GB/T 8419-2007 and GB/T 18707.1-2002/ISO 10326: 1992 issued by China's Standardization Committee, relevant standards such as "Laboratory methods for evaluating vehicle seat Vibration by Mechanical Vibration", etc. The design and manufacture of vibration test platform for engineering vehicle seats can be carried out in laboratory environment. The dynamic models of two degrees of freedom, three degrees of freedom and four degrees of freedom of human body in sitting posture are established. Combined with dummy model and vibration test method, the apparent mass, mechanical impedance of driving point and head-seat transfer function of different degree of freedom models are derived. The parameters of the vertical vibration model of dummy can be obtained by combining with the vertical vibration test of the dummy under the excitation of limited white noise. The vertical vibration test of simulated engineering vehicle was carried out by using seat vibration test platform. According to the international standard ISO 7096: 2000 and the national standard GB/T 8419-2007 on the classification and regulation of seat input vibration of various kinds of engineering vehicles, different spectrum vertical excitation signals are applied to the seats to simulate the working conditions such as crawler bulldozer, loader and scraper, etc. Through the acceleration sensors installed in the head and waist of the dummy, and the seat surface sensor, the response of various parts of the human body model is measured, and the vibration of the human body under typical working conditions of the construction vehicle is obtained, and the comfort of the vehicle is evaluated. In this paper, the vertical vibration of construction vehicle seat and its influence on human body are studied, which provides a reference for the design and evaluation of vehicle comfort.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU603

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本文編號：1967041