Dynamic Analysis and Response Surface Optimization of Pipe Winch Barrel
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摘要: 为提升管绞车筒体的抗振性能,开展了三孔筒体振动特性分析,并基于响应面法对筒体进行动力学优化研究。首先基于三孔筒体有限元模型,通过预应力加载及模态分析和谐响应分析,得出筒体的固有频率、振型以及频率与振幅之间的关系。对比模态分析与谐响应分析结果,发现前两阶固有频率对筒体的影响较大,易引起共振;通过探究开孔数量对筒体的影响,发现两孔筒体固有频率更高。借助灵敏度分析筛选设计变量,并运用面心复合设计获取样本点,构建Kriging响应面模型进行结构和材料参数优化。结果显示:优化后的筒体相比于原三孔筒体,其前两阶固有频率分别提升了189%和359.7%,其质量也降低了39%。Abstract: In order to improve the anti-vibration performance of a pipe winch barrel, the vibration characteristics of the three-hole winch barrel were analyzed, and the dynamic optimization of the winch barrel was studied based on the response surface method. Firstly, based on the finite element model of the three-hole winch barrel, the natural frequency, vibration mode and relationship between frequency of the cylinder and its amplitude were obtained with prestressed loading, modal analysis and harmonic response analysis. The comparison of modal analysis results with harmonic response analysis results finds that the first two natural frequencies have a great influence on the winch barrel and easily cause resonance. The study of the influence of the number of holes on the cylinder shows that the natural frequency of the two-hole cylinder is higher. The design variables were screened with sensitivity analysis, and sample points were obtained with the face-centered composite design. The Kriging response surface model was constructed to optimize the structural and material parameters. The results show that compared with the original three-hole winch barrel, the first two natural frequencies of the optimized winch barrel increase by 189% and 359.7% respectively and that the mass of the optimized winch barrel decreases by 39%.
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表 1 筒体材料的基本性能
Table 1. Basic properties of cylinder material
弹性模量/GPa 密度/(kg·m-3) 泊松比 213 7 900 0.282 表 2 网格尺寸与单元节点的关系
Table 2. The relationship between mesh size and element nodes
网格尺寸/mm 节点数 单元数 20 151 309 78 872 30 95 859 49 243 40 69 712 35 204 50 53 874 26 983 60 48 457 24 088 表 3 筒体前6阶固有频率及变形
Table 3. First six-order natural frequencies and deformations of the cylinder
阶次 固有频率/Hz 各阶最大变形值/mm 1 325.26 6.421 2 380.85 7.085 3 1 220.3 3.897 4 2 094.6 3.858 5 2 916.1 3.381 6 3 043.3 3.641 表 4 两孔和三孔筒体模态频率及变形对比
Table 4. Modal frequency and deformation comparison between two-hole and three-hole cylinders
阶次 两孔筒体 三孔筒体 频率/Hz 最大变形/mm 频率/Hz 最大变形/mm 1 1 137.4 4.163 325.26 6.421 2 1 858.2 4.023 380.85 7.085 3 2 583.9 2.818 1 220.30 3.897 4 2 738.3 3.404 2 094.60 3.858 5 2 990.0 3.411 2 916.10 3.381 6 3 031.9 3.890 3 043.30 3.641 表 5 筒体参数设计表
Table 5. Table for cylinder parameter design
设计变量 下限 原设计值 上限 P2/GPa 191 213 234 P3/(kg·m-3) 7 300 7 900 8 500 P4/mm 378 388 398 P5/mm 270.6 290.6 310.6 表 6 面心复合设计试验数据表
Table 6. Table for the face-centered composite design and experimental data
编号 设计变量 输出变量 P2/GPa P3/(kg·m-3) P4/mm P5/mm M/kg f1/Hz f2/Hz 1 213 7 900 388 290.6 339.7 1138.3 1 858.7 2 191 7 900 388 290.6 339.7 744.0 1 580.0 3 234 7 900 388 290.6 339.7 1 427.4 2 100.6 4 213 7 300 388 290.6 313.9 1 380.4 2 059.6 5 213 8 500 388 290.6 365.5 878.5 1 666.8 6 213 7 900 378 290.6 427.2 1 185.9 1 870.1 7 213 7 900 398 290.6 248.3 1 035.6 1 817.2 8 213 7 900 388 270.6 354.1 1 164.9 1 927.2 9 213 7 900 388 310.6 323.9 1 106.9 1 784.5 10 191 7 300 378 270.6 412.5 1 136.4 1 878.8 11 234 7 300 378 270.6 412.5 472.7 1 708.2 12 191 8 500 378 270.6 480.3 505.9 1 476.4 13 234 8 500 378 270.6 480.3 1 286.5 2 001.1 14 191 7 300 398 270.6 238.6 960.4 1 809.6 15 234 7 300 398 270.6 238.6 122.5 1 582.5 16 191 8 500 398 270.6 277.9 1 390.9 2 260.7 17 234 8 500 398 270.6 277.9 1 129.7 1 935.5 18 191 7 300 378 310.6 375.2 1 056.9 1 716.6 19 234 7 300 378 310.6 375.2 532.7 1 645.1 20 191 8 500 378 310.6 436.8 325.2 1 295.8 21 234 8 500 378 310.6 436.8 1 213.5 1 841.9 22 191 7 300 398 310.6 219.6 918.4 1 683.0 23 234 7 300 398 310.6 219.6 363.9 1 552.2 24 191 8 500 398 310.6 255.7 1 246.7 2 088.7 25 234 8 500 398 310.6 255.7 1 092.5 1 811.7 表 7 Kriging模型合理性评估
Table 7. Rational evaluation of the Kriging model
目标参数 R2 RMSE RMAE 学习点 学习点 验证点 学习点 验证点 M 1 3.37×10-9 0.068 0 0.113 5 f1 1 3.58×10-7 3.416 0 1.028 7 f2 1 4.78×10-8 0.321 0 0.153 4 表 8 3组优化方案
Table 8. Three sets of optimization solutions
方案 P2/GPa P3/(kg·m-3) P4/mm P5/mm 1 211 7385 397.95 310.22 2 196 7335 397.85 307.22 3 209 7330 397.81 308.24 表 9 各方案及原设计频率对比
Table 9. Comparison of each solution to the original design frequency
方案 质量M/mm 频率f1/Hz 频率f2/Hz 1 222.81 835.67 1 727.7 2 223.77 940.08 1 750.7 3 223.34 842.63 1 731 原三孔 368.67 325.26 380.83 表 10 最优方案与原设计振型变形量对比
Table 10. Comparison between the optimal solution and the original design
阶数 优化前变形量/mm 优化后变形量/mm 1 6.421 5.353 2 7.085 5.156 3 3.897 3.622 4 3.858 4.326 5 3.381 4.424 6 3.641 4.618 -
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