大学生方程式赛车车架设计与优化

根据大学生方程式汽车大赛规则要求,在考虑车架加工、零部件装配、人员乘坐等情况下,使用高效的车架框架建模软件Rhino完成赛车车架框架布局设计,并在此基础上使用ANSYS APDL对车架框架划分的Beam单元进行有限元分析。基于分析结果对车架应力集中位置等通过采用不同方式,改变或满足大赛方要求的管材口径和材料属性,在满足赛事要求的同时,也得到最优的车架布局方案。

Low-Velocity Impact Response of Stitched Multi-layer Foam Sandwich Composites

Low-velocity impact damage known as“imperceptible”damage usually destroys the structural integrity of the material and seriously affects the service life of the materials.To improve the low-velocity impact resistance of foam sandwich composites,an innovative concept of a stitched multi-layer sandwich structure by organically combining the discrete splitting of foam layer with full thickness stitching was proposed,and its low-velocity impact resistance obtained through drop-hammer impact tests was explored.The results showed that the multi-layer foam sandwich structure acted as a stress disperser and reduced the irreversible impact damage.The depth and area of low-velocity impact damage of multi-layer foam sandwich composites gradually decreased with increasing the number of the layers.The stitched structure would improve the integrity of the foam sandwich composites and inhibit the propagation of cracks.The maximum impact load of the stitched foam sandwich composite increased by approximately 5% compared with that of the non-stitched material.In addition,the low-velocity impact damage depth,damage area and absorbed energy of the stitched three-layer foam sandwich composite were reduced by 37.7%,34.6% and 20.7%,respectively,compared with those of the non-stitched single-layer sandwich material.

关于区域科技创新同科技金融问的协同发展模式分析

就区域科技创新工作而言，其快速推进得力于科技金融的支撑，且科技金融的发展也需要科学技术创新的支撑，二者只有相互发展，互相支撑才能实现科技金融与区域科技创新之间的协调同步发展。本文以区域科技创新和科技金融为主要研究对象，详细分析了科技创新与金融科技之间的联系，并探讨了区域科技创新与金融科技发展之间的协调发展策略。