- 摘 要
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（內(nèi)蒙古工業(yè)大學(xué)土木工程學(xué)院， 呼和浩特 010051）
［摘要］節(jié)點位移的控制是折疊網(wǎng)架結(jié)構(gòu)正常使用的關(guān)鍵。根據(jù)概率理論和數(shù)理統(tǒng)計原理建立二維連續(xù)型隨機變量位移和荷載的概率預(yù)測模型，基于有限的試驗數(shù)據(jù)，進行不同雪荷載工況下節(jié)點位移的預(yù)測。計算結(jié)果表明：100，120，140mm厚雪荷載作用時，節(jié)點豎向位移和水平位移預(yù)測值與試驗測試值吻合較好，所有節(jié)點平均預(yù)測精度大于或等于97-0%；分析了邊跨節(jié)點和120mm厚雪荷載作用下的節(jié)點位移預(yù)測值與實測值偏差較大的原因；120mm厚雪荷載作用時的節(jié)點位移應(yīng)格外關(guān)注；相鄰兩級荷載的比值大于0-8是模型適用的條件。
［關(guān)鍵詞］折疊網(wǎng)架； 概率模型； 節(jié)點位移； 預(yù)測精度
中圖分類號：TU33文獻標(biāo)識碼：A文章編號：1002-848X(2017)07-0038-05
Stochastic probability forecasting model for deformation-loads on foldable space trusses
Wang Xueqin
(College of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, China)
Abstract:Node displacement control is the key for normal use of foldable space trusses. A stochastic probalility forecasting model of two dimensional continuous random variables on deformation and load was proposed based on probability and mathematical statistics. Node displacement at different snow load level was predicted according to this model by using limited test data. The calculation results show that nodes vertical displacement and horizontal displacement prediction values have good agreement with test results during snow load of 100，120，140mm thickness, the mean prediction accuracy of all nodes displacement is greater than or equal to 97-0%.There is a slight difference between displacement prediction value and test value in the nodes of edge cross and when the load is 120mm snow thickness and the causes of phenomena were analyzed and explained, so it is important to give an extra attention to nodes when the load is120mm snow thickness. The model in condition of adjacent two level loads ratio greater than 0-8 is in common use.
Keywords:foldable space truss; probability model; node displacement; prediction accuracy
作者簡介:王雪琴，碩士，副教授，Email: xueqin1657870236@163.com。
