This article studies on damaged round steel tube members and at the same time both material nonlinearity and geometric nonlinearity are considered in calculation . numerical integration method is planed to be adopted to analyses the ultimate bearing cap acity of damaged round steel tube members 本文研究同时考虑材料非线性和几何非线性的特点，采用数值积分方法，对受损圆钢管轴压杆件的极限承载能力进行分析。
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Abstract : this paper gives a summary of raw material , production cap acity , output , product variety , product quality , main uses , as well as production technology , equipment , inidustrial situation , overseas and domestic markets and development prospects of permanent neodymium ferroboron magnet 文摘:综述了我国烧结钕铁硼的生产原料、生产能力、产量、产品品种、质量及主要用途，生产技术、装备及产业化状况，产品的国内外市场及发展前景。
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At compared with ni - cd battery is better owing to high specific cap - acity , no memory effect , and no cadmium pollutio - n . while it is used on electric vehicle , the complete weight of the vehicle can be reduced , the perform - ance of application is good and servicing life is long . it is an ideal power source for electric vehile 镍氢电池与镍镉电池相比,既相似又超越，比能量高、无记忆效应、无镉公害,应用于电动车上时,使整车重量减轻、使用特性优良、寿命长，是理想的电动车电源。
