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国家自然科学基金(U1334208)

作品数:28 被引量:106H指数:6
相关作者:许平姚曙光鲁寨军刘国伟高广军更多>>
相关机构:中南大学广东技术师范学院中车青岛四方机车车辆股份有限公司更多>>
发文基金:国家自然科学基金国家科技支撑计划湖南省自然科学基金更多>>
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28 条 记 录,以下是 1-10
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非接触式铁路货运车辆超偏载检测系统研究被引量:5
2019年
针对现有铁路货运装载站存在的装货效率低,过程反复的问题,提出一种新型铁路货运车辆无线动态称重系统的设计方法,即在被测车辆底部非共线的4个点上垂直于轨面安装测距传感器,得到各测点投射到钢轨表面的位移量,从而得到车辆的超偏载信息。并设计出一种货运车辆超偏载检测装置。详细介绍车辆超偏载检测原理,系统的硬软件设计以及样机模型功能检验。研究结果表明:本系统稳定、测量精度较高、可拓展性强,可实时监测装载的超偏载状态,可达到预期效果。
谭覃高广军张亚妮陈功
关键词:超偏载检测ARM嵌入式ZIGBEE
地铁列车双锥内嵌隔板矩形管的耐撞性优化被引量:2
2021年
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。
尚昱煌许平姜士鸿姚曙光胡正维
关键词:耐撞性
城轨车辆摩擦式吸能结构数值仿真研究被引量:4
2019年
为提高城轨车辆的耐撞击性能、保护乘员安全,基于摩擦吸能原理设计一种新型城轨车辆碰撞吸能结构,利用ABAQUS有限元分析软件建立摩擦式吸能结构的仿真模型,对吸能过程进行热力耦合仿真,进一步分析吸能结构相关参数对吸能特性的影响,研究结果表明:该吸能结构在碰撞过程中摩擦力平稳,且具有初始峰值力小于平均摩擦力的特点;满足城轨车辆车端吸能结构设计要求,摩擦因数μ和中间摩擦板厚度t3增大均造成平均摩擦力、初始峰值力线性上升,同时使摩擦热效应增强;碰撞初速度v的增大将造成初始峰值力明显增大而对平均摩擦力影响很小,同时将加剧摩擦片上的热量聚集效应。
王天骏鲁寨军孙成名王军彦
关键词:城轨车辆吸能结构有限元仿真热力耦合
高速列车串行铝蜂窝吸能结构的轴向冲击动力学响应被引量:12
2016年
研究高速列车串行铝蜂窝吸能结构在高速轴向冲击下的动力学性能。首先通过准静态试验对单块铝蜂窝的力学性能进行测试;然后通过高速冲击试验研究串行铝蜂窝的动力学特性;最后,采用参数辨识模型,得到串行铝蜂窝在高速轴向冲击下的刚度变化,并根据试验结果对串行铝蜂窝在高速轴向冲击下的偏移失稳现象进行分析。研究结果表明:串行铝蜂窝刚度系数的变化与铝蜂窝系统中隔板速度变化有密切关系,铝蜂窝开始变形时其刚度系数迅速变小,当各蜂窝前端隔板速度开始下降时蜂窝刚度系数曲线趋向平缓;串行铝蜂窝具有吸能量大、可实现变形模式可控,能够满足高速列车的冲击吸能量要求。
丁叁叁田爱琴李睿周伟许平
关键词:参数辨识方法
Multi-objective optimisation of a vehicle energy absorption structure based on surrogate model被引量:4
2014年
In order to optimize the crashworthy characteristic of energy-absorbing structures, the surrogate models of specific energy absorption (SEA) and ratio of SEA to initial peak force (REAF) with respect to the design parameters were respectively constructed based on surrogate model optimization methods (polynomial response surface method (PRSM) and Kriging method (KM)). Firstly, the sample data were prepared through the design of experiment (DOE). Then, the test data models were set up based on the theory of surrogate model, and the data samples were trained to obtain the response relationship between the SEA & REAF and design parameters. At last, the structure optimal parameters were obtained by visual analysis and genetic algorithm (GA). The results indicate that the KM, where the local interpolation method is used in Gauss correlation function, has the highest fitting accuracy and the structure optimal parameters are obtained as: the SEA of 29.8558 kJ/kg (corresponding toa=70 mm andt= 3.5 mm) and REAF of 0.2896 (corresponding toa=70 mm andt=1.9615 mm). The basis function of the quartic PRSM with higher order than that of the quadratic PRSM, and the mutual influence of the design variables are considered, so the fitting accuracy of the quartic PRSM is higher than that of the quadratic PRSM.
谢素超周辉
Crushing analysis and multiobjective crashworthiness optimization of bitubular polygonal tubes with internal walls
2016年
In order to reduce casualties and property losses in a collision accident, thin-walled structure has been extensively used as energy absorber in crashworthiness design of train. With the help of energy absorber, collision kinetic energy can be controllably dissipated by the plastic deformation of structures. A new kind of multi-cell thin-walled structure called as bitubular polygonal tubes with internal walls(BPTIW) was constructed. The crashworthiness characteristics of BPTIWs were investigated by LS-DYNA. It can be found that the BPTIW with 12 sides has the most excellent crashworthiness characteristics. Therefore, based on response surface method(RSM) and multiobjective particle optimization(MOPSO) algorithm, the BPTIW with 12 sides was selected to optimize the dimensions of cross-sectional configuration under different constraints of energy absorption(EA) and crushing peak force(CPF). The results show that the optimal designs of BPTIW12 under different constraints present excellent crashworthiness characteristics and can be used in the practical engineering.
李健高广军邹翔关维元
扩展有限单元法在结构抗断裂性能拓扑优化中的应用
裂纹作为一种典型的材料缺陷形式,通常难以避免。由于起裂原因难以量化确定,因此,研究起裂后的裂纹能否继续扩展或者止裂具有十分重要的理论意义和应用前景。本文提出了一种基于扩展有限单元法的结构抗断裂性能拓扑优化方法,利用扩展有...
胡捷姚松熊昱麟甘宁
关键词:拓扑优化多目标孔洞夹杂双材料界面
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动车组密接式车钩动力学性能碰撞试验研究被引量:5
2017年
以某型高速动车组密接式车钩为研究对象进行了碰撞试验,并结合密接式车钩的性能参数,得到动车组密接式车钩能承受的临界碰撞速度,为深入进行车钩动力学仿真提供了参考和依据。
邵恒许平赵士忠林建军
关键词:高速动车组密接式车钩动力学性能
A comparative crashworthiness analysis of multi-cell polygonal tubes under axial and oblique loads
2017年
In order to investigate the energy absorption characteristics of multi-cell polygonal tubes with different cross-sectional configurations,firstly,the theoretical formulae of the mean crushing force under axial load for four multi-cell polygonal tubes were derived by combining the Super Folding Element theory with Zhang’s research results.These formulae can be used to validate the numerical model and quickly evaluate the energy absorption ability of multi-cell polygonal tubes.Furthermore,a comparative study on the energy absorption performance of eight multi-cell polygonal tubes under axial and oblique loads was conducted.The results show that all tubes have a stable mixed deformation mode under axial load.The multi-cell decagon tube has better energy-absorption ability compared with other tubes.Whenθis less than 10°,all the tubes maintain a stable deformation mode,and the multi-cell decagon tube also has the biggest crushing force efficiency and specific energy absorption among these eight tubes;meanwhile compared with the results atθ=0°,the specific energy absorption of all tubes decreases by about 8%-21%,while the crushing force efficiency increases by 20%-56%.However,at large angles 20°and 30°,all of the tubes collapse in bending modes and lose their effectiveness at energy absorption.
邹翔高广军张洁周细赛陈威关维元
Collision performance of bitubular tubes with diaphragms被引量:1
2015年
A numerical study of bitubular tubes with diaphragms compared with single and bitubular tubes subjected to dynamic axial impact force was presented. At first, the energy absorption response of the composite structure under axial loading was analyzed by finite element simulation. The results show that the efficiency of energy absorption can be improved by introducing diaphragms to the double-walled columns. Then, the effect of the amount and location of diaphragms, the shape and the size of the inner tubes, and the thickness of the composite structures were also studied numerically. The collision performance of the composite structure is affected by the deformation of diaphragms, as well as the interaction of outer and inner tube. The non-uniform distribution of diaphragms can improve the energy absorption efficiency of structures for a constant number of diaphragms. The specific energy absorption of the hexagonal inner tube is the highest, followed by the circular, octagonal and square ones.
董海鹏高广军谢素超李健
关键词:DIAPHRAGMCRASHWORTHINESS
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