基于有限元的单机耐压结构优化设计

针对某单机适应瞬时高压环境使用性的结构设计需求,应用PROE软件进行结构及优化设计、ANSYS有限元软件进行仿真分析、实验验证相结合的方式进行耐高压结构设计,经验证结构符合高压环境使用要求。这种结构及优化设计、有限元仿真分析与实验验证相结合的设计方式可有效保证单机结构强度满足环境适应性,为今后的耐高压结构设计提供了方法与方向。     

Bottom-Up Saliency Estimation Based on Redundancy Reduction and Global Contrast

A new algorithm for bottom-up saliency estimation is proposed. Based on the sparse coding model, a power spectral filter is proposed to eliminate the second-order residual correlation, which suppresses the global repeated items effectively. In addition, aiming at modeling the mechanism of the human retina prior response to high-contrast stimuli, the effect of color context is considered. Experiments on the three publicly available databases and some psychophysical images show that the proposed model is comparable with the state-of-the-art saliency models, which not only highlights the salient objects in a complex environment but also pops up them uniformly.     

航天计算机橡胶减振器的建模技术研究

有限元仿真提高了航天计算机结构设计的效率和准确性,但橡胶减振器的建模已成为航天计算机结构有限元仿真中的难点之一.基于材料现有试验数据或橡胶材料的已知材料参数,本文研究了减振器的两种建模方案:一种是基于橡胶减振器动态特性试验的弹簧-阻尼单元建模法,一种是本构模型建模法.并利用试验的方法验证两种建模方法的可行性,解决了计算...