经过四个半月的翻新工作,汉堡FürKunst und Gewerbe博物馆(MK&G)全新的接待大厅终于落成。该接待厅由本土工作室Besau Marguerre设计完成,为游客打造清晰的寻路系统与快速的空间定位是设计理念中的核心,而全新的配色方案与改...经过四个半月的翻新工作,汉堡FürKunst und Gewerbe博物馆(MK&G)全新的接待大厅终于落成。该接待厅由本土工作室Besau Marguerre设计完成,为游客打造清晰的寻路系统与快速的空间定位是设计理念中的核心,而全新的配色方案与改善后的音响效果,更为空间创造了宜人的氛围。项目的落成为提升博物馆的游客体验和安全做出了巨大的贡献,同时也使博物馆的服务达到了一个新的水平。展开更多
大坝的位移趋势对其安全运行十分重要,而在非常规条件下快速得到大坝的预测模型的研究则相对较少。为使管理人员可以高效地掌握大坝位移的变化性态,基于多核支持向量机(Multiple-kernels support vector machine,MK-SVM)算法构建了一种...大坝的位移趋势对其安全运行十分重要,而在非常规条件下快速得到大坝的预测模型的研究则相对较少。为使管理人员可以高效地掌握大坝位移的变化性态,基于多核支持向量机(Multiple-kernels support vector machine,MK-SVM)算法构建了一种快速实现大坝位移预测的模型,并讨论该模型参数的范围,利用相关评价指标计算度量模型的精度。由工程案例可知,该模型预测大坝变形的变化趋势与实测变形基本一致,模型预测精度可以满足工程运行需要。结论可为大坝管理人员提供有益借鉴。展开更多
A modified MK model combined with ductile fracture criterion（DFC-MK model） is proposed to compute the forming limit diagrams（FLDs） of 5A06-O aluminum alloy sheet at different temperatures.The material constant（C...A modified MK model combined with ductile fracture criterion（DFC-MK model） is proposed to compute the forming limit diagrams（FLDs） of 5A06-O aluminum alloy sheet at different temperatures.The material constant（C） of ductile fracture criterion and initial thickness imperfection parameter（f0） at various temperatures are determined by using a new computing method based on wide sheet bending test.The FLDs at 20 and 200 °C are calculated through the DFC-MK model.The DFC-MK model,which includes the influence of through-thickness normal stress,is written into the subroutine VUMAT embedded in Abaqus/ Explicit.The cylindrical cup hydroforming tests are carried out to verify the model.The results show that compared with experimental observations,the predicted FLDs based on DFC-MK model are more accurate than the conventional MK model;the errors between the simulations and experiments in warm hydroforming are 8.23% at 20 °C and 9.24% at 200 °C,which verify the effectiveness of the proposed model.展开更多
文摘经过四个半月的翻新工作,汉堡FürKunst und Gewerbe博物馆(MK&G)全新的接待大厅终于落成。该接待厅由本土工作室Besau Marguerre设计完成,为游客打造清晰的寻路系统与快速的空间定位是设计理念中的核心,而全新的配色方案与改善后的音响效果,更为空间创造了宜人的氛围。项目的落成为提升博物馆的游客体验和安全做出了巨大的贡献,同时也使博物馆的服务达到了一个新的水平。
文摘大坝的位移趋势对其安全运行十分重要,而在非常规条件下快速得到大坝的预测模型的研究则相对较少。为使管理人员可以高效地掌握大坝位移的变化性态,基于多核支持向量机(Multiple-kernels support vector machine,MK-SVM)算法构建了一种快速实现大坝位移预测的模型,并讨论该模型参数的范围,利用相关评价指标计算度量模型的精度。由工程案例可知,该模型预测大坝变形的变化趋势与实测变形基本一致,模型预测精度可以满足工程运行需要。结论可为大坝管理人员提供有益借鉴。
基金supported by the National Natural Science Foundation of China (30700260)National Key Technolo-gies R&D Program in the 10th 5-year-plan of China (2004BA720A22)
基金Project(51175024)supported by the National Natural Science Foundation of China
文摘A modified MK model combined with ductile fracture criterion（DFC-MK model） is proposed to compute the forming limit diagrams（FLDs） of 5A06-O aluminum alloy sheet at different temperatures.The material constant（C） of ductile fracture criterion and initial thickness imperfection parameter（f0） at various temperatures are determined by using a new computing method based on wide sheet bending test.The FLDs at 20 and 200 °C are calculated through the DFC-MK model.The DFC-MK model,which includes the influence of through-thickness normal stress,is written into the subroutine VUMAT embedded in Abaqus/ Explicit.The cylindrical cup hydroforming tests are carried out to verify the model.The results show that compared with experimental observations,the predicted FLDs based on DFC-MK model are more accurate than the conventional MK model;the errors between the simulations and experiments in warm hydroforming are 8.23% at 20 °C and 9.24% at 200 °C,which verify the effectiveness of the proposed model.
