垂向冲击下的民机乘员腰椎载荷研究

doi:10.7527/S1000-6893.2023.29108

Abstract

Abstract:

In the certification test of aircraft seat， the occupant’s peak lumbar load can reflect the protective effect of the aircraft seat on occupants， and is also a crucial indicator to judge whether the seat has passed the airworthiness certification test. Based on numerical dummy models and vertical crash test of fuselage section， a one-dimensional lumped parameter model of a seated occupant including the seat is established. Comprehensive evaluation indicators and genetic algorithms are used to complete the identification and verification of the model. Based on the verified model， the effect of peak floor acceleration， loading duration， and loading waveform on the lumbar load of the occupant is also studied. The results indicate that the peak force of the occupant’s lumbar is positively correlated with the overall change in speed， and is not related to the loading waveform. The sensitivity of occupant’s lumbar force peak to loading duration and acceleration peak varies depending on the variation in speed. The study proposes a rapid method for evaluating occupant lumbar load and forms a response envelope of occupant lumbar force peak based on floor acceleration， which can provide support for the design of crashworthiness of transportation civil aircraft.

Key words: crashworthiness, lumped parameter model, occupant protection, floor acceleration, peak lumbar load

CLC Number:

V223.2

Xiaopeng SHI, Xinyan ZHONG, Haolei MOU, Jiang XIE, Zhiyu ZENG, Peiyao LI. Lumbar load of seated occupant under vertical impact[J]. Acta Aeronautica et Astronautica Sinica, 2024, 45(8): 229108-229108.

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假人各部分	质量/kg
骨盆，M₁	16.7
内脏，M₂	1.4
胸部，M₃	33.7
头部，M₄	5.1

i	j	q_ij	w_ij	e_ij	r_ij	t_ij	y_ij
1	2	5.90×10⁵	1.40×10⁶	7.61	1.00×10³	1.10×10³	0.86
1	3	3.80×10⁵	3.80×10⁶	4.33	4.30×10³	4.00×10²	0.11
2	3	2.80×10⁵	3.80×10⁶	0.57	1.10×10²	6.70×10⁵	5.91
3	4	1.60×10⁵	4.32×10²	1.97	1.00×10³	4.49×10²	0.58

加载工况	动力学响应	GPV/%	GPT/%	加载工况	动力学响应	GPV/%	GPT/%
1	头部加速度	18.57	1.47	4	头部加速度	15.37	1.68
	胸部加速度	16.92	7.32		胸部加速度	2.90	3.92
	腰椎载荷	1.40	9.09		腰椎载荷	10.90	7.72
2	头部加速度	15.80	4.98	5	头部加速度	11.19	0.71
	胸部加速度	4.86	4.61		胸部加速度	14.99	0
	腰椎载荷	0.17	8.81		腰椎载荷	2.02	7.55
3	头部加速度	14.99	3.69	6	头部加速度	15.81	5.43
	胸部加速度	5.52	5.86		胸部加速度	4.18	1.27
	腰椎载荷	1.79	9.51		腰椎载荷	1.14	8.73

i	j	q_ij	w_ij	e_ij	r_ij	t_ij	y_ij
f	0	1.00×10⁶	2.00×10⁶	3.00
0	1	7.20×10⁴	1.00×10⁵	0.30	1.00×10³	1.00×10²	0.01

动力学响应	GPV	GPT	S&G
骨盆加速度	14.84	3.97	24.73
头部加速度	24.40	16.09	34.25
腰椎载荷	1.06	0	25.91

Lumbar load of seated occupant under vertical impact

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动力学响应	GPV	GPT	S&G
骨盆加速度	18.07	17.20	22.08
头部加速度	20.83	0.58	37.64
腰椎载荷	11.46	0.59	17.02

加载时间t_load/s	腰椎载荷峰值F_lumbar.max/N	腰椎载荷峰值时刻t_lumbar.max/s
0.10	4 665	0.075 1
0.12	4 839	0.083 5
0.14	4 885	0.090 7
0.16	4 840	0.097 9
0.18	4 728	0.105 5
0.20	4 566	0.113 6

波形	速度变化量 Δv/（m·s^-1）	加载时间 t_load/s	加速度峰值a_peak/（m·s^-2）	腰椎载荷峰值 F_lumbar.max/N	腰椎载荷峰值时刻 t_lumbar.max/s	波形	速度变化量Δv/（m·s^-1）	加载时间 t_load/s	加速度峰值a_peak/（m·s^-2）	腰椎载荷峰值 F_lumbar.max/N	腰椎载荷峰值时刻 t_lumbar.max/s
三角波	10	0.12	166.67	5 367	0.083 3	梯形波	10	0.12	111.11	4 450	0.079 5
		0.14	142.86	4 658	0.090 8			0.14	95.24	3 794	0.082 6
		0.16	125.00	4 056	0.098 3			0.16	83.33	3 295	0.085 6
	15	0.12	250.00	7 985	0.082 6		15	0.12	166.67	6 603	0.078 4
		0.14	214.29	6 915	0.090 0			0.14	142.86	5 630	0.081 4
		0.16	187.50	6 007	0.097 6			0.16	125.00	4 891	0.084 4
	20	0.12	333.33	10 580	0.082 1		20	0.12	222.22	8 730	0.077 5
		0.14	285.71	9 143	0.089 5			0.14	190.48	7 443	0.080 5
		0.16	250.00	7 928	0.097 0			0.16	166.67	6 467	0.083 5
正弦波	10	0.12	130.83	4 882	0.082 5	方波	10	0.12	83.33	3 438	0.064 2
		0.14	112.14	4 156	0.088 6			0.14	71.43	2 956	0.064 7
		0.16	98.13	3 568	0.094 0			0.16	62.50	2 592	0.065 1
	15	0.12	196.25	7 247	0.081 7		15	0.12	125.00	5 115	0.062 9
		0.14	168.21	6 156	0.087 6			0.14	107.14	4 399	0.063 4
		0.16	147.19	5 277	0.092 9			0.16	93.75	3 779	0.063 9
	20	0.12	261.67	9 583	0.081 1		20	0.12	166.67	6 776	0.062 0
		0.14	224.29	8 129	0.086 9			0.14	142.86	5 829	0.062 5
		0.16	196.25	6 959	0.092 1			0.16	125.00	5 115	0.062 9

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