変動外部圧力に対する等圧空間内部圧力応答の算定方法 : 等圧原理を応用した外装材の防水設計に関する基礎的研究 : 等圧空間の圧力平衡条件に関する検討(その2)

概要

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In pressure equalizing wall design, it is important to know the degree of pressure drop due to pressure change lag inside the wall cavity against fluctuating wind pressure, especially with cavities having small vent area / cavity volume ratios. In this paper, a method for estimating internal pressure change with time was proposed, in which fluctuating external pressure is replaced by a series of short time stepwise pressure changes, and internal pressure is given by accumulating calculated results for each step for which equations expressing pressure change inside a single vent cavity based on Boyles law are applied. Measured and estimated internal pressure responses obtained for wall cavity models were in good agreement, both under cyclic and random fluctuation of external pressure.
2005-09-30