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1·A fornltila for calculating the heading section of arbitrary three-centered arch and circular arch types was derived in this paper.

文中推导出了任意三心拱和圆弧拱巷道断面积计算的公式。

2·The effects of geometrical imperfections, unuhiform loads and support settlements on the in-plane buckling of circular arch are investigated.

研究了几何缺陷、荷载非均匀分布和支座沉陷对圆弧拱面内屈曲的影响。

3·A propeller is arranged at the lower part of cover body in a circular arch shape and is connected with the motive power steering engine in a shaft connection.

有一螺旋桨，置于圆拱形罩体的下方并与动力舵机的轴连接。

4·Through analysis on theory, the author finds the basic regularity in transmitting the supporting force by the arch supporting force of tunnel with circular arch section.

通过细致的理论分析，笔者初步找出了圆拱状断面隧道拱壁支承力传递的基本规律。

5·As indicated by example of computation, energy method is very simple and convenient for computing the stability of circular arch, it is suitable for engineering application.

算例表明，能量法计算圆拱稳定问题十分简便，适合于工程应用。

6·The author, with his practice in his long working time , discover some blemish in the traditional way of analysis on arch supporting force of tunnel with circular arch section.

笔者在长期的工程实践中发现，传统的圆拱状断面隧道承压能力分析方法有一定的缺陷，圆拱状断面隧道拱壁支承力的传递有一定的规律可循。

7·The nonstationary random response of elastic circular arch under horizontal seismic excitation was studied by the method combining the pseudo-excitation algorithm with Galerkin algorithm.

应用虚拟激励法与伽辽金法相结合，分析弹性圆拱在非平稳水平随机地震作用下的随机响应问题。

8·The influencing factors of coal arch camber in planomural coal bin and coal drop pipe with rectangular or circular cross section during coal drop are studied theoretically.

对落煤过程中平壁煤仓及截面形状分别为矩形、圆形的落煤管起拱的影响因素进行理论研究。

9·A wind outlet is punched on the arch circular peripheral surface of the exhaust shelf. At least one cloth hanger is also provided on the surrounding plane of the connection board.

出风栅的拱圆型外周圆面上冲压有出风孔，连接板 周边平面上还设有至少一个挂衣架件；

10·All tunnels have complex cross section with circular, rectangle, arch, ellipse shape, in accordance with the length of the tunnel is divided into short, medium length of the tunnel, long tunnel.

隧道按截面分为圆形、矩形、拱形、椭圆等形状，按照长度分为短隧道、中等长度隧道、长隧道。