柱公式

By means of numerical solution method, drillstring's finite element models, and based on mechanical models of bit/rock interaction, the dynamic models for lateral vibration of a cone bit are established. The contact models of bit/wellbore interaction are created on the basis of the experimental data.

为探寻在实际钻井过程中钻头的运动轨迹和与井壁碰撞时撞击力的变化规律，利用有限元方法，建立钻柱横向振动的有限元动力学模型，并在考虑钻头-岩石互作用力学模型的基础上，建立了钻头横向振动动力学仿真模型，通过实验及相关数据得到预测钻头与井壁碰撞时撞击力大小的计算公式。

Based on experimental data from laboratory and field experiments, the relationship between rainfall recharge and groundwater level under farmland drainage is analyzed in this paper.

以室内一维土柱试验和室外水平衡小区观测资料为基础，对农田排水条件下降雨入渗补给与地下水埋深关系进行了分析，根据降雨、蒸发与地下水埋深关系相似的规律，仿照国内外排水计算中较为广泛应用的阿维里扬诺夫经验公式的结构形式，建立起降雨入渗补给与地下水埋深的关系，并采用室内外试验资料对该关系式进行了验证。

This paper presents a practical second-order method of the stability of main frame of the steel arch gate by combining the virtues of calculating length method.

本论文的重点为提出框架柱计算长度系数μ实用计算公式，及考虑剪力影响、不对称性等因素对μ影响的研究；提出弧门主框架弹塑性稳定计算方法；提出弧门主框架弹塑性稳定二阶分析实用计算方法。

Both are simplified as an equivalent frame-shear wall structure with multiple link bars.

文中采用简化为等代框架-剪力墙的多连杆计算图式，给出在顶端集中、均布、倒三角分布的水平荷载作用下内力、位移的计算公式；并对十二层以下的板柱-剪力墙结构，编制出内力位移计算用表。

Topological optimization system of variable density method based on finite element software;2. Interface depths inversion of potential field data with variable density model;3. According to the characteristics of the cold insulation box of Fractionating tower, it is considered that the effect of inner-filling on the construction is related with the variable density, then the relative formulation in the condition of n.

根据分馏塔保冷箱的特点，认为内填料对结构的作用与变密度有关，推导了无水平位移下的相关公式；对此结构在有水平位移下内填料的发育进行仿真分析，并将内填料的作用与结构的楼层柱的旋转角建立联系；最后根据得到的结论对分馏塔保冷箱在风与内填料作用下进行了非线性分析，得到结构的极限承载力。

This paper introduces the basic method of measuring motor-vehicle forward vision field by means of three-coordinate measuring machine and derives the calculating formula of A-pillar obstacle angle of two-eyes visibility and summarizes the procedure of measuring visual field .

介绍用三坐标测量机检测汽车前方视野的基本方法，推导A柱双目障碍角的计算公式，并对视野检测过程进行了综述。

With cylindrical coordination,this paper establishes the contour surface equations and pressure angle formula of the conical grooved cam with translating conical roller follower.

借助柱面坐标，建立了圆锥滚子直动从动件圆锥槽凸轮的廓面方程和压力角公式。

Keywords cold-formed steel;residential building;steel frame;wallboard bracing;wall stud system;elastic springs model;finite element analysis;centric axial loads;full-scale test;effective length factor;simplifi

Article From 同济大学；结构工程博士论文 2006年度冷弯薄壁型钢；低层住宅；钢骨架；墙板支撑；墙柱体系；弹簧模型；有限元分析；轴心荷载；足尺试验；计算长度系数；简化设计公式

The shear mechanisms of steel-high strength concrete short column under different failure patterns were analyzed,and related formulae for calculating shear capacity and limit value of axial compression were put forward.

分析了型钢高强混凝土短柱在不同破坏形态下的抗剪机理，提出了相应的抗剪承载力计算公式和轴压比限值。

These key factors are analysed in this paper using pressure equalization principle, and a formula for calculating process parameters of lost circulation control is deriv...

本文采用压力平衡原理对堵漏钻柱的下入深度、顶替量及顶替排量进行了分析和推导，给出了在失返条件下水泥浆堵漏工艺参数的计算公式。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。