摘要
Heat strain experienced by individuals wearing chemical protective clothing(CPC)is severe and dangerous especially in hot-humid environment.The development of material science and interdisciplinary studies including ergonomics,physiology and heat transfer is urgently required for the reduction of heat strain.The aim of this paper was to study the relationship among clothing thermal properties,physiological responses and environmental conditions.Three kinds of CPC were selected.Eight participants wore CPC and walked(4 km/h,two slopes with 5%and 10%)on a treadmill in an environment with(35±0.5)℃ and RH of(60±5)%.Core temperature,mean skin temperature,heart rate,heat storage and tolerance time were recorded and analyzed.Physiological responses were significantly affected by the clothing thermal properties and activity intensity in hot-humid environment.The obtained results can help further development of heat strain model.New materials with lower evaporative resistance and less weight are necessary to release the heat strain in hot-humid environments.
在热湿环境中,人员穿着化学防护服时会产生危险性极高的严重热应激反应。缓解人员热应激需要材料学、人机工效学、生理学和传热学等学科交叉协同发展。本文目的是研究服装、生理反应和环境条件之间的关系。在温度(35±0.5)℃和相对湿度(60±5)%的环境中,8名被试人员穿着三种化学防护服,在跑台上以4 km/h的速度运动(运动坡度分别为5%和10%),记录并分析被试人员体核温度、平均皮肤温度、心率、热蓄积和耐受时间。研究表明,在热湿环境中,服装热性能和运动强度对人体生理反应有显著影响,研究结果可为进一步发展化学防护服及热应激模型提供参考。在热湿环境中为缓解人员热应激,需要具有更低热阻、湿阻和更轻重量的新型材料。
