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

摘要/Abstract

摘要：

通过对有限元数值仿真软件进行二次开发，实现数值仿真精细化建模并设计所需工况，提供智能压实最优关键参数组合的基础数据，并通过现场试验验证其准确性。在此基础上，通过多元非线性回归的方法，对影响路基压实度参数进行拟合。通过线性搜索的方法，获取能达到最大压实质量对应参数。结果表明：当碾压速度为4 m/s、碾压遍数为2遍时，对应的最终压实度最小，为0.878；当碾压速度为1 m/s、碾压遍数为4遍时，对应的最终压实度最大，为0.955。本文得到如下结论：在常见的压实施工参数范围内，达到最优压实度的施工参数组合如下：碾压速度为1.3 m/s，碾压遍数为4遍。

关键词: 道路工程, 智能压实, 反馈调节机制, 有限元二次开发, 最终压实度, 最优参数组合

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

中图分类号:

U416

马涛,马源,黄晓明. 基于多元非线性回归的智能压实关键参数最优解[J]. 吉林大学学报(工学版), 2023, 53(7): 2067-2077.

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