惯容式油气悬架力学建模和试验研究

doi:10.19562/j.chinasae.qcgc.2021.12.011

Abstract

Abstract:

For meeting the requirements of wheeled armored vehicle on high mobility and cross country performance， a technical scheme of integrating ball screw inerter and double cylinder oil-gas spring is proposed to construct an inerter-oil-gas suspension device. By analyzing the generation mechanism of elastic force， damping force and inertia force in that suspension device， the coupling relationship between parameters are revealed， with three independent key structural parameters extracted. By adopting orthogonal experiment method， combined with nonlinear dynamic simulation on inerter-based suspension system， the optimal values of three key structural parameters mentioned above are determined. The results of mechanical characteristics test and 1/4 suspension test show that compared with traditional oil-gas suspension， the vibration acceleration of the vehicle body with inerter-based suspension reduces by 13.89%， greatly enhancing the ride comfort of vehicle.

Key words: inerter, inerter-oil-gas suspension, orthogonal experiment

Fu Du,Yijie Chen,Yiqiang Wan,Wei Nie,Mengyan Xu. Mechanical Modeling and Experimental Study of Inerter-Based Oil-Gas Suspension[J].Automotive Engineering, 2021, 43(12): 1817-1824.

Figures/Tables 21

参数	数值
簧上载荷m/kg	2×10³
悬架杠杆比i	2
主活塞直径D_z/mm	80
浮动活塞直径D_f/mm	80
单向节流孔直径D_d/mm	6
细长管长度l_p/mm	45
细长管直径D_p/mm	8
飞轮内径r_n/mm	20
飞轮厚度h_w/mm	70
滚珠丝杠螺距P/mm	10
螺母转动惯量J_l/（kg·m²）	3.91×10^-4
飞轮材料密度 $ρ w$ /（kg·m^-3）	6.9×10³
油液密度 $ρ$ /（kg·m^-3）	0.8×10³

References 22

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项目	ACC最优	SWS最优	f最优
ACC/（m·s^-2）	6.71	8.74	6.73
SWS/mm	37.20	31.97	36.86
L_gj/mm	119	81	119
D_c/mm	5.35	4.49	5.28
R/mm	54.69	36.80	52.29
惯质系数/kg	724.92	245.68	625.76

元件	车体加速度/（m·s^-2）		悬架动行程/mm
元件	均方根	最大值	均方根	最大值
原车油气悬架	10.51	27.62	87.94	254.26
惯容式油气悬架	9.05	22.32	85.46	236.34
改善率	13.89%	19.19%	2.82%	7.05%

Mechanical Modeling and Experimental Study of Inerter-Based Oil-Gas Suspension

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