毕业设计（论文）任务书
本科 10 级
机电及自动化 学院 机械设计 专业 设计（论文）题目 学生姓名 学号 起讫日期 2014年3月 9日 设计地点 机电实验大楼 指导教师 职称
2014 年 3 月 7 日
1.毕业设计（论文）的目的：
通过建立不同梯度变化的蜂窝梁有限元模型，经过数值模拟计算，比较不同梯度变化规律对梁抗弯性能的影响，从而得出抗弯性能最好的蜂窝结构的变化规律，应用于汽车的轻量化研究和安全性研究当中。
2.毕业设计（论文）任务的内容和要求：
根据蜂窝结构的特点，展开蜂窝结构的抗弯性能的研究，找出具有良好抗弯性能的最佳的蜂窝结构：选取密度或厚度成梯度变化蜂窝结构，研究出抗弯性能最佳的梯度蜂窝结构。在梁进行抗弯实验时都会发生三层截面的变化：压缩、剪切和拉伸，针对不同截面的变化，采用梯度蜂窝来改善其抗弯性能。梯度蜂窝可以厚度上从上到下的递增、递减或乱序的厚度梯度排布。因此通过比较不同梯度蜂窝的抗弯性能，来找出最佳排布的梯度蜂窝结构，把其应用到汽车等上面。
3.主要参考文献：
[1] 胡安生，冯夏勇. 国际汽车工业的变化趋势. 汽车情报，2004，24(1): 4-9 [2] 王晓，刘星荣，葛如海. 波纹管在汽车碰撞吸能中的正交优化设计. 江苏理 工大学学报，2001，22(3): 29-32
[3] McNay I I, Gene H. Numerical modeling of tube crash with experimental comparison. In: SAE Passenger Car Meeting and Exposition. America: SAE, 1988, 123~134
[4] 杜星文，宋宏伟. 圆柱壳冲击动力学及抗撞性设计.北京：科学出版社，2004 [5] Pugsley A, Macaulay, M. The large scale crumpling of thin cylindrical columns. Quarterly Journal of Mechanics and Applied Mathematics, 1960, 13(1): 1-9 [6] Alexander J M. An approximate analysis of the collapse of thin cylindrical shells under axial load. Quarterly Journal of Mechanics and Applied Mathematics,
1969, 13: 10-15
[7] Al-Hassani S T S, Johnson W, Lowe W T. Characteristics of inversion tubes under axial loading. Journal of Mechanical Engineering Sciences, 1972, 14:370-381
[8] Johnson W, Soden P D, Al-Hassani S T S. Inextensional collapse of thin-walled tubes under axial compression. Journal of Strain Analysis, 1977, 12:317-330
[9] Wierzbicki T, Akerstrom T. Dynamic crushing of strain sensitive box columns. In:Proceedings of 2nd International Conference of Vehicle Structure and Mechanics. Southfield: Michel, 1977, 18-20
[10] Wierzbicki T, Abramowicz. On the crushing mechanics of thin-walled structures.Journal of Applied Mechanics, 1983, 50: 727-734
[11] Wierzbicki T. Crushing analysis of metal honeycombs. International Journal of Impact Engineering, 1983, 1(2): 157-174
[12] Abramowicz W, Jones N. Dynamic axial crushing of circular tubes. International Journal of Impact Engineering, 1984, 2(3): 263-281
[13] Aya N, Takahashi K. Energy absorption characteristics of vehicle body structure.In: Proceedings of Transaction of the Society of Automotive Engineers. Japan:Japanese, 1974, 1-7
[14] Magee C L, Thornton P H. Design consideration in energy absorption by structural collapse. In: Proceedings of Congress of Exposition. Detroit: Mich.,1978, 4-34- 106 -博士学位论文 [15] Mahmood H F, Paluszny A. Design of thin walled columns for crash energy management-their strength and mode of collapse. In: Proceedings of 4
Th Instructural Conference on Vehicle Structural Mechanics. Detroit: Mich., 1981,7-18 [16] Kamal M M. Analysis and simulation of vehicle-to-barrier impact. In: Proceedings of SAE Transportation. Detroit: 1970, 04-14
[17] Herridge J T, Mitchell R K. Development of a computer simulation program for collinar car/car and car/barrier collisions. In: Proceedings of U.S. Department of Transportation. America: American, 1972, 800-64A
[18] Melosh R J, Kamat M P. Computer simulation of a light aircraft crash. Journal of Aircraft, 1977, 14:1009-1014
[19] Ni C M, Song J O. Computer-aided design analysis methods for crashworthiness design. In: Proceedings of Symp Vehicle Crashworthiness Including Impact Biomechanics. Canada: American Society of Mechanical Engineers, 1986,10-20
[20] Belytschko T, Welch R E, Bruce R W. Finite element analysis of automotive structures under crash loadings. In: Proceedings of IIT Research Institute.Chicago: America, 1975, 37-46 [21] Benson D J, Hallquist J O. The application of DYNA3D in large scale crashworthiness calculations. In: Proceedings of ASME International Computers in Engineering Conf. Chicago: American, 1984, 8-12
[22] Jong K Y, Luo S L, Hsieh W L. The application of crashworthiness to the development of vehicle components. In: Proceedings of SAE Transportation.Detroit: 1994, 51-66
华侨大学毕业设计任务书
