Study on structural model modification and load identification based on limited measuring points

Jun LI; Zefeng YU; Sangui CHEN; Shuangyuan HE; Hai QIU; Shan TANG

doi:10.19693/j.issn.1673-3185.03082

Chinese Journal of Ship Research, Volume. 18, Issue 5, 57(2023)

Study on structural model modification and load identification based on limited measuring points

Jun LI¹, Zefeng YU^2,3, Sangui CHEN¹, Shuangyuan HE¹, Hai QIU⁴, and Shan TANG^2,3

Author Affiliations

¹China Ship Development and Design Center, Wuhan 430064, China

²Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, China

³State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian 116023, China

⁴Department of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China

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Abstract Get PDF(in Chinese)

Figures & Tables(12)

Fig. 1. Iteration curve of 迭代曲线

Fig. 2. [in Chinese]

Fig. 3. [in Chinese]

Fig. 4. [in Chinese]

Fig. 5. [in Chinese]

Fig. 6. [in Chinese]

Fig. 7. [in Chinese]

Fig. 8. [in Chinese]

Table 1. Comparison of optimization results of rastrigin function between classical PSO algorithm and improved PSO algorithm

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Table 1. Comparison of optimization results of rastrigin function between classical PSO algorithm and improved PSO algorithm

粒子数	F值寻优达到10		经典PSO更接近全局最优解的次数	改进PSO更接近全局最优解的次数
粒子数	经典PSO寻到全局最优解的次数	改进PSO寻到全局最优解的次数	经典PSO更接近全局最优解的次数	改进PSO更接近全局最优解的次数
10	20	48	14	58
20	38	76	9	50
50	74	97	1	24
100	92	100	0	8

Table 2. The strain value was measured when the external load of I-beam was 50, 55 and 60 kN
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Table 2. The strain value was measured when the external load of I-beam was 50, 55 and 60 kN
外载荷/kN 应变值/10⁻⁶
测点1 测点2 测点4
50 211 −224 175
55 232 −247 192
60 252 −269 209

Table 3. Comparison of monitoring point strain between modified model and real model

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Table 3. Comparison of monitoring point strain between modified model and real model

	测点3			测点5
外载荷/kN	50	55	60	50	55	60
试验测量应变值/10⁻⁶	−153	−169	−186	−368	−405	−442
修正模型应变值/10⁻⁶	−154.6	−170	−185.5	−373.3	−410.6	−447.9
误差/%	1.05	0.59	−0.27	1.44	1.38	1.33

Table 4. The inversion load and strain values of monitoring points are compared with experimental results

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Table 4. The inversion load and strain values of monitoring points are compared with experimental results

		测点	载荷工况
		测点	20 kN	25 kN	30 kN	35 kN	40 kN
试验测点应变/10⁻⁶		1	84	108	127	148	169
		2	−90	−115	−135	−158	−180
		4	70	89	105	122	139
载荷反演	反演值/kN		19.88	25.50	29.97	34.99	39.92
载荷反演	误差/%		−0.60	2.00	−0.10	−0.04	−0.21
监测点应变	试验测量值/10⁻⁶	3	−60	−76	−90	−106	−121
	监测计算值/10⁻⁶		−61.45	−78.84	−92.64	−108.15	−123.39
	误差/%		2.42	3.74	2.94	2.03	1.98
	试验测量值/10⁻⁶	5	−148	−189	−222	−258	−295
	监测计算值/10⁻⁶		−148.40	−190.40	−223.72	−261.18	−297.98
	误差/%		0.27	0.74	0.78	1.23	1.01

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Jun LI, Zefeng YU, Sangui CHEN, Shuangyuan HE, Hai QIU, Shan TANG. Study on structural model modification and load identification based on limited measuring points[J]. Chinese Journal of Ship Research, 2023, 18(5): 57

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Paper Information

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Received: Sep. 16, 2022

Accepted: --

Published Online: Mar. 21, 2025

The Author Email:

DOI:10.19693/j.issn.1673-3185.03082

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Comparison of optimization results of rastrigin function between classical PSO algorithm and improved PSO algorithm

Table 1. Comparison of optimization results of rastrigin function between classical PSO algorithm and improved PSO algorithm

Table 2. The strain value was measured when the external load of I-beam was 50, 55 and 60 kN

Table 2. The strain value was measured when the external load of I-beam was 50, 55 and 60 kN

Table 3. Comparison of monitoring point strain between modified model and real model

Table 3. Comparison of monitoring point strain between modified model and real model

Table 4. The inversion load and strain values of monitoring points are compared with experimental results

Table 4. The inversion load and strain values of monitoring points are compared with experimental results