共查询到20条相似文献,搜索用时 46 毫秒
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冲击作用与冲击模拟环境在电磁振动台上的实现 总被引:1,自引:0,他引:1
简要论述了几种典型激励作用下的冲击作用,以及利用小波合成法控制冲击谱在电磁振动台上进行冲击模拟环境的试验方法,对于进行冲击环境的模拟有一定的借鉴之处。 相似文献
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对冲击和碰撞两种不同的环境试验加以区别对比,用比较简捷的方法计算出冲击试验中的主要参数间的相互关系,分析了如何调整冲击试验的脉冲加速度和脉冲宽度以及应该注意的问题。 相似文献
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根据技术规范要求,许多机电新产品及其另部件须进行单次或连续冲击试验。冲击试验的目的有两个,一是模拟产品在实际工作的状态,检查产品在此状态下的参数变化情况,二是检查产品的抗冲击强度。一般情况下,单次冲击属模拟,而连续冲击属抗冲。产品的原设计是基于单次冲... 相似文献
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本文计算和分析了冲击实验装置运行对环境造成的振动干扰,所用数据为实测分析参数,计算结果表明,冲击实验装置在运行期间对周围环境造成的振动影响是可接受的。 相似文献
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采用电动振动台实施冲击试验的若干问题探讨 总被引:1,自引:0,他引:1
采用电动振动台实施冲击试验是计算机引入试验控制在技术上的一次飞跃,它具有试验参数准确,易于控制,使振动台一机多用的特点,本文就电动振动台用于冲击试验的技术基础、试验软件、实施框图,试验对振动台设备参数的要求等作了详细的阐述和分析,对于指导该项技术的实施具有积极的意义。 相似文献
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利用谐振板装置模拟冲击环境 总被引:8,自引:1,他引:8
通过对国外近年来发展起来的一种爆炸冲击模拟装置(即谐振板装置)的研究和分析,在现有条件的基础上设计了一种谐振板装置,并利用该装置进行了一系列的试验研究工作,主要研究了设备参数对冲击响应谱的影响。 相似文献
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本文介绍了凸轮式跌落冲击台的工作原理、表征其主要性能的冲击参数及其调整方法。同时还提出了一种消除凸轮式跌落冲击台次冲击的方法,并说明了使用冲击台及选取加速度计时的注意事项。 相似文献
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Trametes versicolor decolorized 2000 mg L(-1) of the mono-azo substituted naphthalenic dye Amaranth with no dye sorption observed visually. The changes in the toxicity were assessed over a period of 30 d for the dye-treated viable culture, control (no dye added), and a boiled culture treated with dye, using the Microtox Acute Toxicity assay. Before dye addition, the culture filtrate had some toxicity, which increased after the dye addition. The toxicity of the dye-treated culture decreased during the treatment. The loss of toxicity occurred at the same time, with the loss of color suggesting that detoxification is associated with decoloration. The change in pH was due to natural metabolic processes and had a small effect on detoxification. Because the toxicity of the treatment was similar to that of the control at the end of the treatment, the effluent seems to be safe for release into the environment, potentially rendering this treatment suitable for industrial application. 相似文献
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城镇化是推动我国经济社会发展的重要动力,在高速发展的同时,带来大量污染排放,威胁乡村环境质量与可持续发展。在对乡村生态环境问题剖析的基础上,从战略、实施、方式等层面探索解决思路,围绕科学规划、发展方式、基础建设、管理机制、宣传教育等方面分析关键点,加强乡村环境保护,保障城镇化建设健康发展,为促进农村农业持续发展提供持久动力。 相似文献
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泵站树状给水管网流量具有随机性,而这种随机性变化会直接影响管网的建设费用和动力费用.针对这-特点,应用随机规划原理,建立泵站树状给水管网机会约束模型,编写基于随机模拟的遗传算法程序求解该模型.机会约束模型能较客观地反映该管网的实际工况,使优化设计结果更符合实际. 相似文献
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阐释了信息产业专门化街区的内涵,结合对合肥市黄山路信息产业专门化街区构成要素的分类及其邻近度的分析,分别从空间结构演化、景观演化、功能演化三方面阐述了合肥市黄山路由"电子一条街"向"信息产业专门化街区"的总体演化阶段,探讨了信息产业专门化街区的未来发展趋势。 相似文献
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Günay Kocasoy 《Environmental management》1989,13(4):469-475
The increase in the number of tourists visiting a coast is desired by most of the countries for economic reasons. However, this increase in tourism may cause pollution of the sea. This can be only avoided by proper planning and by predicting the carrying capacity of the coast in terms of sea pollution. This is especially important for developing countries where part of the wastewater is discharged without any treatment into the sea.In the present study the beaches were classified according to their use — and consequently the amount of waste discharged into the sea — into four groups: (1) coasts that are used only for swimming and recreational purposes; (2) coasts used simultaneously for dwelling, swimming, and recreational purposes; (3) coasts along which only dwellings exist; and (4) natural and man-made harbors, i.e., coasts used as shelters. During the survey,40,320 observations were made between December 1985 and February 1988 to determine the effect of the number of tourists on seawater quality. The results obtained were analyzed by a multilinear regression program to obtain an empirical equation giving the extent of the sea pollution in terms of coliform concentration as a function of population density and some other environmental factors.The equations derived in this study enable the determination of the carrying capacity of a beach in terms of pollution as well as the expected degree of pollution corresponding to a given population density. Furthermore, it allows the prediction of the extra carrying capacity that can be obtained by improving the waste-disposal conditions. 相似文献
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