地铁列车双锥内嵌隔板矩形管的耐撞性优化

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摘要为设计具有良好耐撞性能的地铁列车吸能结构，将矩形吸能管的一组对称面引入锥度，并在内部嵌入多个隔板。建立该双锥内嵌隔板矩形管和传统矩形管的有限元模型，对两者耐撞性进行对比，通过准静态轴向压缩试验验证有限元分析的准确性。以双锥内嵌隔板矩形管三个部分的厚度为设计变量，进行试验设计并建立代理模型，为最大化比吸能和最小化峰值力，对双锥内嵌隔板矩形管进行多目标优化。结果表明，双锥内嵌隔板矩形管在准静态压缩下呈现稳定而规律的变形，耐撞性能优于传统矩形管；两个优化目标具有一定的互斥性，根据实际工程对各优化目标进行权重分配，能够于帕累托前沿中应用权函数实现最优设计方案的选择。

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	尚昱煌1
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	许平1
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	姜士鸿4
	姚曙光1
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	胡正维1
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关键词 ：耐撞性, 双锥内嵌隔板矩形管, 有限元模型, 准静态轴向压缩, 多目标优化

Abstract：In order to improve the crashworthiness of a rectangular energy-absorbing tube for subway trains, one set of its symmetry faces was set with tapers and the diaphragms were embedded inside the tube. The crashworthiness of this double-tapered rectangular tube with diaphragms (DTRTD) and a traditional rectangular tube was compared through their finite element models which were validated by a quasi-static axial compression test. The thicknesses of three components of DTRTD were set as three design variables. The design of experiment was created and the surrogate model was established. Multi-objective optimization was performed to maximize the specific energy absorption and minimize the peak crushing force. The results showed that the collapse pattern of DTRTD is regular and stable and the crashworthiness of DTRTD is better than the traditional rectangular tube. Two objectives of optimization are paradoxical. After distributing weights to optimization objectives based on practical engineering, the optimal designs from the Pareto front can be selected through the weight function.

Key words： crashworthiness double-tapered rectangular tube with diaphragms finite element model quasi-static axial compression multi-objective optimization

收稿日期: 2019-12-09 出版日期: 2021-03-15

引用本文:

尚昱煌1,2,3，许平1,2,3，姜士鸿4，姚曙光1,2,3，胡正维1,2,3. 地铁列车双锥内嵌隔板矩形管的耐撞性优化[J]. 振动与冲击, 2021, 40(5): 202-210.
SHANG Yuhuang1, 2, 3, XU Ping1,2,3, JIANG Shihong4, YAO Shuguang1, 2, 3, HU Zhengwei1, 2, 3. Crashworthiness optimization of a double-tapered rectangular tube with diaphragms for metro train. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(5): 202-210.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2021/V40/I5/202

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