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极端温度条件典型引信电参数变化规律和失效机理
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作者 李波 张宏翔 +1 位作者 李世中 张亚 《装备环境工程》 CAS 2022年第11期34-40,共7页
目的研究某电子时间引信在‒60~140℃下电参数的变化规律和失效机理。方法利用高低温试验机开展步进应力强化试验,增加和细化引信检测参数,在被试引信工作状态下全程记录电参数的变化,开展失效机理分析。结果得到了引信基准频率、电能损... 目的研究某电子时间引信在‒60~140℃下电参数的变化规律和失效机理。方法利用高低温试验机开展步进应力强化试验,增加和细化引信检测参数,在被试引信工作状态下全程记录电参数的变化,开展失效机理分析。结果得到了引信基准频率、电能损耗率等电参数的温度特性规律和参数变化范围,发现了‒60℃低温掉电、130℃高温短路等故障模式和机理,并提出改进建议。结论验证了极端温度应力叠加电应力的强化试验方法,获得了引信电性能参数变化规律,发现了极端温度条件下新的失效模式和失效机理。 展开更多
关键词 极端温度条件 典型引信 电参数 失效机理 低温掉电 高温短路 导线破损
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Adaptive Thermal Comfort for Occupants of Low-Cost Dwellings in a Hot Dry Climate
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作者 Irene Marincic J. Manuel Ochoa +1 位作者 M. Guadalupe Alpuche Gabriel Gomez-Azpeitia 《Journal of Civil Engineering and Architecture》 2012年第3期356-363,共8页
Adaptive models are based on the observation that there are some actions that people can and actually do take to achieve thermal comfort. Studies regarding thermal comfort conditions in economical dwellings were carri... Adaptive models are based on the observation that there are some actions that people can and actually do take to achieve thermal comfort. Studies regarding thermal comfort conditions in economical dwellings were carried out simultaneously in seven Mexican cities, corresponding to warm dry and warm humid climates. In this article, case studies of low-cost dwellings in the city of Hermosillo (in northwest Mexico), are presented and analyzed. Field surveys were carried out to obtain information about the physical characteristics of the dwellings and their occupants, as well as the indoor thermal environment. Neutral temperature was obtained from the applied survey. The high neutral temperature reveals the effect of inhabitants' adaptation mechanism to extreme climates. Occupant comfort votes as a function of indoor air temperatures were analyzed, and different characteristics such as age, size and gender were evaluated separately. The results show the variability of the neutral temperature and the tolerance to temperature changes, depending on the population's specific characteristics. In many cases where the population does not have access to artificial acclimatization devices, the neutral temperature values for specific climates and people can inform architects when choosing the most suitable thermal strategies for building design. 展开更多
关键词 Adaptive comfort low-cost dwelling hot dry climate.
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