空气弹簧内部压缩气体热迟滞等效力学模型

doi:10.19562/j.chinasae.qcgc.2024.07.016

Abstract

Abstract:

The heat exchange effect of internal compressed air leads to strong thermal hysteresis and frequency correlation of air springs’ mechanical properties. Therefore， a thermal hysteresis equivalent mechanical model is constructed to describe the energy exchange process of compressed air inside air springs in this paper. Based on the rubber airbag modal， an air spring hysteresis mechanical characteristic model covering both rubber airbag hysteresis and compressed air thermal hysteresis is constructed， and an identification method for the key parameters of the model is provided. The experiments show that the maximum errors of the hysteresis loop and dynamic stiffness are less than 3.3% and 6.7%， respectively， verifying the accuracy of the hysteresis mechanical characteristic model. Finally， the inherent law of the thermal hysteresis of compressed air with frequency varying is revealed. The research results provide theoretical support for identifying the hysteresis nonlinear mechanism of air springs and its effective utilization.

Key words: compressed air, heat exchange effect, hysteresis characteristic, frequency correlation, air springs

Junjie Chen,Jinyuan Xu,Yujie Shen,Lü Hui. Thermal Hysteresis Equivalent Mechanical Model of Compressed Air Inside Air Springs[J].Automotive Engineering, 2024, 46(7): 1294-1301.

Figures/Tables 14

参数

V_e0/

（10^-4m³）

$V e 0'$ /

（10^-3m²）

$V e 0 ″ /$

（10^-2m）

F₀/N

F_fmax（p_e）/N

h₂（p_e）/mm

5×10⁵ Pa

8.61

-7.15

-2.29

3 286.2

123.3

3.5

7×10⁵ Pa

9.71

-8.06

-2.58

5 005.8

146.0

3.5

References 15

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参数	F_fmax（p_e）	x₂（p_e）	h₀/mm	H₀/mm	A_heat/（W·K^-1）
A_Y	1.14×10^-4	0	15	110	1.276
B_Y	66.23	3.5	15	110	1.276

频率/Hz		准静态	0.5	1	2	3	4	5
5×10⁵ Pa	迟滞环	1.76	2.65	2.83	3.20	3.00	3.29	3.07
5×10⁵ Pa	动刚度	-0.35	3.65	2.63	5.45	5.84	6.06	5.72
7×10⁵Pa	迟滞环	-1.83	2.53	2.60	2.76	3.02	3.12	2.75
7×10⁵Pa	动刚度	-0.06	4.70	5.15	6.06	6.54	6.65	5.89

频率/Hz		准静态	0.5	1	2	3	4	5
压缩气体	能量损耗/J	3.25	0.91	0.46	0.23	0.15	0.12	0.09
压缩气体	占比/%	53.48	28.64	15.48	7.88	5.22	3.82	2.91
橡胶气囊	能量损耗/J	2.82	2.27	2.51	2.69	2.78	2.90	3.07
橡胶气囊	占比/%	46.52	71.36	84.52	92.12	94.78	96.18	97.09
空气弹簧	能量损耗/J	6.07	3.18	2.97	2.92	2.93	3.01	3.16

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Thermal Hysteresis Equivalent Mechanical Model of Compressed Air Inside Air Springs

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