排序方式： 共有4条查询结果，搜索用时 125 毫秒
1
1.
2.
Current practice in analysis and design of blast doors subjected to blast loading considers only simple boundary conditions and material properties. The boundary conditions and material properties, in fact, have considerable influence on the response of blast doors subjected to blast loading. In this paper, the dynamic responses of a reinforced concrete arched blast door under blast loading were analyzed by the finite element program ABAQUS, combined with a previously developed elasto-viscoplastic rate-sensitive material model. And the effect of the surrounding rock mass and contact effect of the doorframe were also taken into account in the simulation. It is demonstrated that the strain-rate effect has considerable influence on the response of reinforced concrete blast door subjected to blast loading and must be taken into account in the analysis. 相似文献
3.
4.
清光绪朝,中央政府对云南的控制力愈加式微。一方面,积重难返的内治之困——膨胀的人口、凋敝的经济、频繁的灾荒使得云南社会、经济与政治全面失序而游匪不断。另一方面,随着19世纪末越、缅两邻国被法、英实际控制,中国西南边防局势骤然生变。不断进逼的“外患”使得大量游匪流窜于中越、中缅之间频频衅乱。内外力的双重挤压与拉扯之下,云南各类匪患丛生,其负面影响已经侵入到政治、经济和社会的各个方面,成为光绪朝云南地方社会的恶疾。 相似文献
1