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This study seeks to develop a scientific understanding of the effects of dynamic loading history on the low-yield-strength shear panel damper(LYSPD) mechanical properties and fatigue performance.The LYSPD model is supposed as perfect elastic-plastic without strength deterioration.By adjusting the damper strength with the above supposition in the DYMO software,the serial earthquake response waves of the LYSPD under different soil conditions are obtained firstly.Subsequently,several waves,the most prone to damage at each soil condition, are selected as dynamic loading waves to verify the LYSPD dynamic performances experimentally.The test results suggest that the dynamic loading histories have no influence on the LYSPD strength or the supposed model while they affect the fatigue performance.The applicability and accuracy of three fatigue evaluation methods, cumulative plastic shear strain,cumulative energy absorption and Miner rule,are also compared according to the test results. 相似文献
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对于梅赛德斯-奔驰的车迷们来说,S500 AMG意味着什么?经由AMG公司专业改装的奔驰车,动力性能方面都要比原型奔驰车高出不少,价格也相对昂贵,由于数量有限,使AMG型号的奔驰车便具有一定的收藏价值。然而,对于她的内在气质又将如何体现?唯有一套完美的音响系统才能充分渲染出其良好的气质。 相似文献
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本研究开发了空调机用高性能小型空冷热交换器。与传统热交换器相比:在表面积相同时,热流量增大6~8%;而由小宽度肋及制冷剂侧为小直径槽管构成的热交换器,在容积相同时,换热量约提高55%。通过阶梯形百叶窗肋的解析模型,对肋片上霜的形成,作了模拟研究,找孙了减轻霜成长结块的肋片模式。该成果已为二维模型试验所证实。 相似文献
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