logarithmic adj. 對(duì)數(shù)的。 logarithmic function 對(duì)數(shù)函數(shù)。 a logarithmic scale 計(jì)算尺。 logarithmic series 對(duì)數(shù)級(jí)數(shù)。 the logarithmic table 對(duì)數(shù)表。 adv. -cally 用對(duì)數(shù)。
spiral adj. 1. 螺旋形的,盤(pán)旋的,盤(pán)旋上升的。 2.【數(shù)學(xué)】螺線(xiàn)的。 Experts watch the spiral development in industry with keen interest. 專(zhuān)家們以很大的興趣觀察工業(yè)的螺旋式的發(fā)展。 n. 1.螺旋形物。 2.螺簧;【物理學(xué)】螺線(xiàn)。 3.【數(shù)學(xué)】螺(旋)線(xiàn)。 4.【航空】盤(pán)旋,盤(pán)旋降落〔又叫 spiral down〕。 5.(足球運(yùn)動(dòng)的)旋球。 6.(物價(jià)等)不斷加劇上升或下降。 a spiral line 螺線(xiàn)。 a spiral spring 螺(旋彈)簧,蜷簧。 a spiral stair 螺旋梯。 an inflationary [a vicious] spiral 惡性通貨膨脹。 vt.,vi. 1.(〔英國(guó)〕 -ll-) 使成螺旋形。 2.【航空】盤(pán)旋降落[上升]。 3.(物價(jià))螺旋上升[跌落]。 adv. -ly
A model is erected for fs with logarithmic spiral sliding surface which can simulate the genuine sliding surface better than others , then the express of fs is deduced based on the upper bound theorem of limit analisis 采用對(duì)實(shí)際滑裂面模擬較好的對(duì)數(shù)螺旋曲線(xiàn)滑裂面,建立了整體穩(wěn)定安全系數(shù)f _ c的模型,從極限分析中的上限理論推導(dǎo)了整體穩(wěn)定安全系數(shù)f _ c的表達(dá)式。
Third , it puts forward the logarithmic spiral failure surface bishop steep reinforced slope limit equilibrium stability analysis method . this method is used to calculate the engineering living example and compared with the calculations of the engineering living example and compared with the calculations of the swedish circle method and proved applicable 第三,本文針對(duì)加筋陡坡潛在破裂面矢徑隨路堤深度而增加的特點(diǎn),提出用對(duì)數(shù)螺旋線(xiàn)作滑動(dòng)面的畢肖普法進(jìn)行穩(wěn)定分析,編制了穩(wěn)定分析程序,并對(duì)工程實(shí)例進(jìn)行了分析計(jì)算,將計(jì)算結(jié)果與瑞典圓弧法分析進(jìn)行比較。
百科解釋
A logarithmic spiral, equiangular spiral or growth spiral is a special kind of spiral curve which often appears in nature. The logarithmic spiral was first described by Descartes and later extensively investigated by Jacob Bernoulli, who called it Spira mirabilis, "the marvelous spiral".