摘要
目的研究2种飞行员大覆盖面积囊式抗荷服及其配套装备的热负荷,为确定新型抗荷服囊覆盖下肢体表面积提供生理依据。方法采用暖体假人测定2组装备热阻值(It);6名受试者分别配穿囊覆盖下肢体表面积80%组和60%组装备,在26℃、35℃和40℃3种温度环境中90 min,测量受试者的心率、皮肤温度、核心温度和出汗量,利用综合热应激指数(CIHS)评价受试者的热应激程度,并测量装备蒸发散热指数(im)。结果 80%组和60%组装备热阻值(It)分别为1.815clo和1.740clo。蒸发散热指数(im)分别为0.39±0.04和0.41±0.04,差异无显著性。受试者配穿80%组和60%组服装,在35℃时综合热应激指数(CIHS)分别为4.51±0.51和3.92±0.51,前者为中度热应激,而后者为轻度热应激,差异有显著性(P<0.05);在40℃时,综合热应激指数(CIHS)分别为8.79±0.73和8.14±0.91,均属重度热应激,差异有显著性(P<0.05)。结论当环境温度较高时,人体配穿80%组装备时会遭受更加严重的热负荷。
Objective In order to provide the physiological basis for determining the bladder coverage area of new anti-G suit, we studied the heat load of two extended bladder coverage anti-G suits （EBCAGS） , cover- ing 80% , and 60% of the lower body surface area respectively. Methods Thermal insulation values of equipment in two groups were measured with thermal manikin. Six healthy male volunteers wearing two separate EBCAGS were exposed to 26 ℃, 35 ℃, and 40℃ environment for 90 min respectively. Heart rate, skin temperature, core tempera- ture, and amount of sweat in the volunteers were examined. Heat stress was evaluated according to Combined Index of Heat Stress （CIHS）. Evaporative Heat Loss Index of the equipment was determined too. Results The thermal in- sulation value in 80% group,and 60% group was 1. 815 clo,and 1. 740 clo respectively. The Evaporative Heat Loss Index was 0.39±0.04, and 0.41±0.04, and it was of no statistically significant difference. The CIHS was 4.52±0.54, and 3.92±0.51 respectively in 35 ℃ environment（ P〈0.05 ） , the former belonging to moderate heat stress while the latter belonging to mild heat stress;the CIHS was 8.79±0.73, and 8.14±0.91 respectively in 40 ℃ environ- ment （ P〈0.05 ） , both belonging to severe heat stress. Conclusion When the ambient temperature is high, volunteers wearing 80% anti-G suit will be subjected to more severe heat load.
出处
《解放军预防医学杂志》
CAS
2013年第5期392-395,共4页
Journal of Preventive Medicine of Chinese People's Liberation Army
基金
国家自然科学基金(No.5175012)
关键词
抗荷服
热负荷
热应激
anti-G suit
heat load
heat stress
