CAJ | 학술논문

为计算随机参数下火灾烟气层温度和厚度的概率分布,该文提出了基于正交试验响应面的可靠度计算方法.通过正交试验表确定分析计算参数组,并借助火灾动力学分析软件计算不同参数组下烟气层的温度和厚度响应,进一步拟合出输入参数和输出参数的响应面函数,在此基础上结合验算点法计算烟气层温度和厚度的概率分布,算例分析表明该方法具有计算精度高、计算量小的特点.
위계산수궤삼수하화재연기층온도화후도적개솔분포,해문제출료기우정교시험향응면적가고도계산방법.통과정교시험표학정분석계산삼수조,병차조화재동역학분석연건계산불동삼수조하연기층적온도화후도향응,진일보의합출수입삼수화수출삼수적향응면함수,재차기출상결합험산점법계산연기층온도화후도적개솔분포,산례분석표명해방법구유계산정도고、계산량소적특점.
An orthogonal test based response surface method is suggested in this paper to determine the probability distribution of smoke layer temperatures and heights in a burning building. The experiment parameter sets are determined by orthogonal test design and for each parameter sets, the temperatures and heights of the smoke layer are calculated by CFAST. Based on the calculations, the response surface function about input parameters and output parameters is determined by linear regression. Then the check point method in reliability theory is introduced to calculate the probability distribution of the smoke temperatures and smoke heights. A case study is carried out and the results show that proposed method can achieve more precise resuits but cost less calculation efforts.