| 车体设计参数对车体垂向弯曲振动频率的灵敏度分析 |
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| 引用本文： | 王长科,阳光武,朱涛,于金朋.车体设计参数对车体垂向弯曲振动频率的灵敏度分析[J].中国机械工程,2016,27(16):2267. |
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| 作者姓名： | 王长科 阳光武 朱涛 于金朋 |
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| 作者单位： | 1.西南交通大学牵引动力国家重点实验室，成都，610031
2.中车唐山机车车辆有限公司，唐山，064000 |
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| 基金项目： | 国家科技支撑计划资助项目（2015BAG12B01-15）；四川省科技厅应用基础研究资助项目(2014JY0242)；中央高校基本科研业务费专项资金资助项目(2682015CX046) |
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| 摘 要： | 采用基于灵敏度分析的车体垂向弯曲刚度优化方法，对车体结构关键参数进行了灵敏度分析，确定了关键设计变量与系统响应的关系，从而得到了结构设计变量（车体结构关键参数）对目标约束函数（车体一阶垂向弯曲振动频率）影响的变化梯度。首先，由欧拉-伯努利梁垂向振动微分方程，结合初始条件和边界条件，得到了自由梁的一阶垂向弯曲振动频率方程;然后，结合车体结构特征，推导和修正了车体的一阶垂向弯曲振动频率解析方程，并以某地铁车体对解析方程进行了有限元的验证;最后，选取车体的6组设计参数进行了车体一阶垂向弯曲振动频率的灵敏度分析。根据研究结果，给出了车体关键参数对其一阶垂向弯曲振动频率影响程度的排序，为列车车体设计相关工作提供了参考依据。
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| 关 键 词： | 灵敏度分析 垂向弯曲频率 设计参数 系统响应 |
Sensitivity Analysis about Design Parameters for Car-body Vertical Bending Vibration Frequencies |
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| Wang Changke,Yang Guangwu,Zhu Tao,Yu Jinpeng.Sensitivity Analysis about Design Parameters for Car-body Vertical Bending Vibration Frequencies[J].China Mechanical Engineering,2016,27(16):2267. |
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| Authors: | Wang Changke Yang Guangwu Zhu Tao Yu Jinpeng |
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| Affiliation: | 1.State Key Laboratory of Traction Power, Southwest Jiaotong University,Chengdu，610031
2.CRRC Tangshan Co., Ltd., Tangshan,Hebei，064000 |
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| Abstract: | The sensitivity analysis about key parameters of a car-body was carried out with the stiffness optimization method to find the relationship among design variables and system responses, the gradient of the structure variables (key parameters of car-body) for the target functions (first order vertical bending frequency of car-body) was obtained. First, the first order vertical bending frequency equation was built from Euler-Bernoulli theory with initial and boundary conditions. Then, the frequency equation was corrected with car-body characteristics to get an accurate result, and the results were tested by a finite element result of a subway car-body. Finally, sensitivity analysis was done with 6 key parameters for the bending vibration frequency of car-body. The conclusions show the significance sequence of main car-body parameters for first order vertical bending frequency according to the sensitivity, which may give some advices to designers. |
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| Keywords: | sensitivity analysis vertical bending frequency design parameter system response |
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