本文選題：硅油彈簧減振器　切入點(diǎn)：剛度阻尼模型　出處：《中國人民解放軍軍事醫(yī)學(xué)科學(xué)院》2017年博士論文　論文類型：學(xué)位論文

【摘要】：論文以改善第四代輪式陸基通用機(jī)動平臺(以下簡稱四代平臺)臥姿傷病員舒適性為目標(biāo),創(chuàng)新提出并試驗驗證了一種可控剛度阻尼的懸架裝置——硅油彈簧減振器,并將其首次應(yīng)用于四代平臺平順性的優(yōu)化研究中。論文主要的研究工作和成果包括以下幾個方面:1.硅油彈簧減振器的理論模型及試驗研究根據(jù)硅油的壓縮特性和粘滯阻尼特性,提出了可控剛度阻尼的硅油彈簧減振器原理和方案;基于硅油的體積彈性模量以及壓力、含氣量、溫度、管道壁面變形的影響,首次提出并建立了穩(wěn)態(tài)和瞬態(tài)狀態(tài)下硅油的有效體積彈性模量模型;基于彈簧的動靜態(tài)工作特性及硅油的有效體積彈性模量模型,首次研究并建立了硅油彈簧減振器的剛度數(shù)學(xué)模型。運(yùn)用牛頓流體力學(xué)與非牛頓流體力學(xué)原理,建立了不同粘度硅油在層流和紊流下的粘滯阻尼力模型。通過對硅油彈簧減振器多參數(shù)分析,獲得了影響其剛度阻尼特性的主要參數(shù)。分別研制了硅油彈簧減振器的原理樣機(jī)和試驗臺架,通過對硅油彈簧減振器的性能試驗,驗證了理論模型的可靠性,并證明硅油彈簧減振器可以實現(xiàn)剛度和阻尼控制。2.基于硅油彈簧減振器的整車非線性振動系統(tǒng)研究利用頻域法,對基于硅油彈簧減振器的八自由度整車非線性振動系統(tǒng)進(jìn)行了分析,獲得了在隨機(jī)激勵作用下乘員位置處垂直方向振動響應(yīng),并根據(jù)加速度功率譜密度的能量分布,確定了振動響應(yīng)的主要來源與硅油彈簧減振器的剛度和阻尼有關(guān);對影響硅油彈簧剛度和阻尼特性的主要參數(shù)進(jìn)行了基于整車的動力學(xué)響應(yīng)研究,通過參數(shù)靈敏度分析,獲得了對乘員振動響應(yīng)敏感的硅油彈簧減振器主要參數(shù)。3.基于傷員運(yùn)輸舒適性的整車多體動力學(xué)優(yōu)化基于ADAMS/Car和Matlab/Simulink,建立了含有硅油彈簧減振器理論模型的四代平臺虛擬樣機(jī);綜合國際國內(nèi)對振動狀態(tài)下乘員舒適性的評價要求,提出了針對四代平臺傷員運(yùn)輸舒適性的評價方法和評價指標(biāo);對基于硅油彈簧減振器的整車多體動力學(xué)模型進(jìn)行了脈沖激勵試驗仿真和隨機(jī)道路試驗仿真,對仿真結(jié)果依據(jù)傷員運(yùn)輸舒適性的評價指標(biāo)進(jìn)行了分析,提出了優(yōu)化要求。利用ADAMS/Insight軟件,對基于硅油彈簧減振器的參數(shù)化整車模型進(jìn)行了優(yōu)化,優(yōu)化后的結(jié)果表明,四種工況下臥姿乘員總加權(quán)加速度均方根值均明顯小于目標(biāo)值0.315m/s2,人體吸收功率均明顯小于目標(biāo)值0.3W,極大地改善了臥姿乘員的舒適性,達(dá)到了論文研究的目標(biāo)。
[Abstract]:Aiming at improving the comfortableness of the 4th generation wheeled ground based general mobile platform (hereinafter referred to as the four generation platform), a suspension device with controllable stiffness damping, silicone oil spring damper, is proposed and tested in this paper. The main research work and results include the following aspects: 1. The theoretical model and experimental study of silicone oil spring absorber according to the compression characteristics and viscous damping characteristics of silicon oil. The principle and scheme of silicon oil spring damper with controllable stiffness damping are proposed, based on the influence of volume elastic modulus of silicon oil and pressure, gas content, temperature and wall deformation of pipeline. The effective volume elastic modulus model of silicon oil in steady and transient state is proposed and established for the first time, based on the dynamic and static characteristics of spring and the effective volume elastic modulus model of silicon oil. The stiffness mathematical model of silicon oil spring shock absorber is studied and established for the first time. The principles of Newtonian fluid mechanics and non-Newtonian fluid mechanics are used. The viscous damping force model of silicone oil with different viscosity under laminar and turbulent flow is established. The principle prototype and test stand of silicone oil spring damper are developed, and the reliability of the theoretical model is verified by the performance test of silicon oil spring damper. It is proved that the stiffness and damping control of silicon oil spring damper can be realized. 2. The frequency domain method is used to study the nonlinear vibration system of the whole vehicle based on the silicon oil spring damper. The nonlinear vibration system of an eight-degree-of-freedom vehicle based on silicone oil spring damper is analyzed. The vertical vibration response at the occupant's position under random excitation is obtained, and the energy distribution of the acceleration power spectral density is obtained. The main sources of vibration response are determined to be related to the stiffness and damping of silicone oil spring damper, the main parameters affecting the stiffness and damping characteristics of silicone oil spring are studied based on the dynamic response of the whole vehicle, and the sensitivity analysis of the parameters is carried out. The main parameters of silicone oil spring shock absorber sensitive to the occupant's vibration response are obtained. 3. Based on the comfort of the casualty transportation, the multi-body dynamics optimization of the whole vehicle based on ADAMS/Car and Matlab / Simulink is carried out, and a four-generation virtual prototype of the platform containing the theoretical model of the silicone oil spring damper is established. According to the evaluation requirements of passengers' comfort under vibration condition, the evaluation method and evaluation index for the transport comfort of the wounded on the fourth generation platform are put forward. The multi-body dynamic model based on silicone oil spring damper is simulated by pulse excitation test and random road test. The simulation results are analyzed according to the evaluation index of the transport comfort of the wounded. The optimization requirements are put forward. The parameterized vehicle model based on silicone oil spring damper is optimized by using ADAMS/Insight software. The optimized results show that, The root mean square value of the total weighted acceleration of the occupants in the four working conditions is obviously smaller than the target value of 0.315 m / s ~ (2), and the absorption power of the human body is obviously smaller than the target value of 0.3 W, which greatly improves the comfort of the occupants of the lying posture and achieves the purpose of the research in this paper.
【學(xué)位授予單位】：中國人民解放軍軍事醫(yī)學(xué)科學(xué)院
【學(xué)位級別】：博士
【學(xué)位授予年份】：2017
【分類號】：R82

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