基于多元非线性回归的智能压实关键参数最优解

doi:10.13229/j.cnki.jdxbgxb.20211010

Abstract

Abstract:

In this paper， through the secondary development of the finite element numerical simulation software， the numerical simulation was refined to model and designed the working conditions， which provide the basic data of the optimal combination of key parameters， and verified its accuracy through field tests. On this basis， the parameters affecting compaction quality were fitted by multiple nonlinear regression method. Then， the construction parameters corresponding to the maximum compaction quality can be obtained by linear search method. The results show that the rolling speed of 4 m/s， rolling passes for 2 times， the corresponding minimum final compaction degree， is 0.878， at the same time， the rolling speed of 1 m/s， rolling passes for 4 times， the corresponding final compaction degree is the largest， 0.955. The conclusions are as follows： the combination of construction parameters to achieve the optimal compaction degree is： rolling speed 1.3 m/s， rolling times 4 times.

Key words: road engineering, intelligent compaction, feedback regulation mechanism, finite element redevelopment, final compaction degree, optimal parameter combination

CLC Number:

U416

Tao MA,Yuan MA,Xiao-ming HUANG. Optimal combination of key parameters of intelligent compaction based on multiple nonlinear regression[J].Journal of Jilin University(Engineering and Technology Edition), 2023, 53(7): 2067-2077.

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实时压实度K	黏聚力c/kPa	内摩擦角φ/（°）
0.80	12.1	27.0
0.85	41.2	28.8
0.90	58.6	31.2
0.93	61.6	30.5
0.94	62.8	32.4
0.96	63.6	34.3
1.00	74.9	36.9

压实度K	黏聚力c/kPa	内摩擦角φ/（°）
0.80	26.4	14.2
0.81	26.9	19.5
0.82	27.3	24.4
0.83	27.8	29.2
0.84	28.3	33.7
0.85	28.7	37.9
0.86	29.2	41.9
0.87	29.7	45.6
0.88	30.1	49.1
0.89	30.6	52.4
0.90	31.1	55.3
0.91	31.5	58.1
0.92	32.0	60.6
0.93	32.5	62.8
0.94	32.9	64.8
0.95	33.4	66.5
0.96	33.9	68.0
0.97	34.3	69.3
0.98	34.8	70.3
0.99	35.3	71.0
1.00	35.7	71.5

层位	密度ρ/（kg·m^-3）	弹性模量E/MPa	黏聚力c/kPa	摩擦角φ/（°）	泊松比
上层松铺	1634	15	11.88	27	0.33
下层地基	1859	30	55.8	31.15	0.35

编号	碾压速度/（m·s^-1）	碾压遍数	编号	碾压速度/（m·s^-1）	碾压遍数
No.1	1.0	2	No.12	2.5	4
No.2	1.0	3	No.13	3.0	2
No.3	1.0	4	No.14	3.0	3
No.4	1.5	2	No.15	3.0	4
No.5	1.5	3	No.16	3.5	2
No.6	1.5	4	No.17	3.5	3
No.7	2.0	2	No.18	3.5	4
No.8	2.0	3	No.19	4.0	2
No.9	2.0	4	No.20	4.0	3
No.10	2.5	2	No.21	4.0	4
No.11	2.5	3

参数	数值	参数	数值
压路机型号	YZ32	前/后轮质量/t	21/11
频率/Hz	28/33	速度/（km·h^-1）	0~8
名义振幅/mm	1.8/1.1	额定转速/（rad·min^-1）	2200
激振力幅值/kN	590/450	振动轮宽度/mm	2000
总质量/t	32	振动轮半径/mm	600

Optimal combination of key parameters of intelligent compaction based on multiple nonlinear regression

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