空间可展开天线支撑结构热致振动与抑制

doi:10.7527/S1000-6893.2025.32798

Abstract

Abstract:

A structural dynamics model was established to address the issue of thermal deformation and structural vibration of large space deployable antenna support structures under cyclic dynamic temperature loads when entering and exiting the Earth’s shadow. Equivalent thermodynamic material parameters of composite material members were provided， and thermal vibration response analysis was conducted. The nonlinear fluid damping model of Passive Nonlinear Viscous Damper （PNVD） is presented， and a spatially deployable antenna support truss structure thermal vibration suppression method based on nonlinear fluid damping is proposed. The experimental results of modal damping of large deployable antenna support structures show that before and after installing dampers， the fundamental frequency of the structure changes by no more than 1%， and the modal damping ratio increases by more than 2%.

Key words: space deployable antenna, thermally induced vibration, nonlinear damping, vibration suppression, spacecraft

CLC Number:

Cheng LUO, Guiping LIN, Min LUO, Yuandong GUO. Thermally induced vibration and suppression of space deployable antenna support structures[J]. Acta Aeronautica et Astronautica Sinica, 2026, 47(14): 232798.

Figures/Tables 15

Fig.1

Fig.2

Table 1

Fig.3

Table 2

Equivalent thermal conductivity parameters for each layer of fibers

铺层角度/（°）	$k x x$ /（W·（m·K）^-1）	$k y y$ /（W·（m·K）^-1）	$k z z$ /（W·（m·K）^-1）
±30	12.74	4.81	0.84
0	16.70	0.84	0.84
90	0.84	16.70	0.84
±45	8.77	8.77	0.84

Table 2

Table 3

Equivalent thermal conductivity parameters for each layer of rods

铺层角度/（°）	$k ¯ x x$ /（W·（m·K）^-1）	$k ¯ y y$ /（W·（m·K）^-1）	$k ¯ z z$ /（W·（m·K）^-1）
±30	7.72	2.96	0.58
0	10.10	0.58	0.58
90	0.58	10.10	0.58
±45	5.34	5.34	0.58

Table 3

Fig.4

Fig.5

Fig.6

Fig.7

Fig.8

Table 4

Fig.9

Fig.10

Table 5

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模态频率/Hz	模态振型	振型描述
1.92		一阶法向弯曲模态
2.76		一阶侧向弯曲模态
7.29		中支撑杆局部模态
11.27		一阶扭转模态
16.72		二阶扭转模态
17.01		二阶法向弯曲模态

模态	布局方案1		布局方案2		布局方案3
模态	频率/Hz	阻尼比/%	频率/Hz	阻尼比/%	频率/Hz	阻尼比/%
1	1.87	2.84	1.90	1.82	1.91	0.70
2	2.64	2.02	2.68	2.19	2.73	1.22
3	7.07	2.12	7.13	1.27	7.21	0.98

工况	模态频率/Hz	模态阻尼比/%
未安装阻尼器	1.89	2.01
安装阻尼器	1.87	4.04

Thermally induced vibration and suppression of space deployable antenna support structures

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