电动汽车动力总成悬置系统的多输出灵敏度分析

doi:10.19562/j.chinasae.qcgc.2025.04.015

Abstract

Abstract:

There are many investigated parameters in the powertrain mounting system （PMS） of electric vehicles， and it involves multi-performance design. For the problem that the traditional single-output sensitivity analysis is difficult to accurately evaluate the influence of system parameters on the system comprehensive performance， the multi-output response sensitivity analysis of the PMS of electric vehicle is carried out by considering the uncertainty of system parameters. Firstly， a 13-degree-of-freedom analysis model of PMS is established， and the uncertain parameters of system are described by the random variables. Then， based on the summation of covariance decomposition， the first order index and the global sensitivity index of the multi-output response of system are derived. Next， a method of calculating the sensitivity indexes of multi-output response is proposed based on Monte Carlo analysis. Finally， the effectiveness of the proposed method is verified by the numerical example of the PMS of an electric vehicle. The analysis results show that the single output sensitivity analysis may not be able to accurately evaluate the comprehensive influence of parameters on the system response， and it may produce contradictory results. The proposed multi-output sensitivity analysis method can effectively evaluate the comprehensive influence of system parameters on the system response， and it can obtain more accurate sensitivity ranking for system parameters.

Key words: electric vehicle, powertrain mounting system, uncertainty, sensitivity analysis, multi-output response

Xiaoting Huang,Haibiao Zhang,Changyu Li,Hui Lü,Wenbin Shangguan. Multi-output Sensitivity Analysis for the Powertrain Mounting System of Electric Vehicles[J].Automotive Engineering, 2025, 47(4): 746-754.

Figures/Tables 11

响应	对响应影响大的参数	独立作用对响应影响大的参数	交互作用对响应影响大的参数
$f X$	k_u₁、k_v₁、k_w₁、k_u₂、k_v₂、k_u₃、k_v₃	k_v₁、k_w₁、k_u₂、k_u₃	k_u₁、k_v₁、k_w₁、k_u₂、k_v₂、k_u₃、k_v₃
$d X$	k_u₁、k_v₁、k_w₁、k_u₂、k_v₂、k_u₃、k_v₃	k_u₁、k_v₁、k_w₁、k_v₂、k_u₃、k_v₃	k_u₁、k_v₁、k_w₁、k_u₂、k_v₂、k_u₃、k_v₃
$f Z$	k_w₁、k_w₃	k_w₁、k_w₃
$d Z$	k_f、k_w、k_w₁、k_w₂、k_w₃	k_w、k_w₃	k_f、k_w、k_w₁、k_w₂、k_w₃
$f θ Y$	I_yy 、k_w₃	I_yy 、k_w₃
$d θ Y$	I_yy 、I_zz 、k_u₁、k_v₁、k_w₁、k_u₂、k_w₂、k_u₃、k_v₃、k_w₃	k_w₁、k_u₂	I_yy 、I_zz 、k_u₁、k_v₁、k_w₁、k_u₂、k_w₂、k_u₃、k_v₃、k_w₃

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部件	转动惯量			惯性积
部件	I_xx	I_yy	I_zz	I_xy	I_yz	I_zy
电驱动总成	0.59	1.49	1.60	-0.02	-0.01	-0.02
车身	450	1 280		1.80

项目	X₀	Y₀	Z₀
电驱动总成质心	22.80	5.30	-10.50
悬置1	-150.80	-88.30	68.50
悬置2	-22.80	346.70	44.50
悬置3	280.20	-88.30	68.50

项目	X₀	Y₀	Z₀
车身质心	1 317.34	-63.60	230.97
左前悬架	0.00	-775.00	278.21
右前悬架	0.00	775.00	278.21
左后悬架	2 700.00	-810.00	278.21
右后悬架	2 700.00	810.00	278.21

悬置	静刚度			动刚度
悬置	u	v	w	u	v	w
悬置1	118.0	75.0	118.0	141.6	90.0	141.6
悬置2	78.0	93.0	150.0	93.6	111.6	180.0
悬置3	95.0	63.0	188.0	114.0	75.6	225.6

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Multi-output Sensitivity Analysis for the Powertrain Mounting System of Electric Vehicles

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