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- Theory of Thin Wall Structures 薄壁结构理论
- Based on the theory of Vlasov, this paper proposed the method of spline Ritz to analyse the restrained torsion of thin walled bar with open section, combining the traditional Ritz method and spline function method. 提出了一类新的样条坐标矩阵。 同时在符拉索夫理论的基础上,结合传统的里兹法,利用样条函数提出了开口薄壁杆件约束扭转计算的样条里兹法。
- THE WHOLE STABILITY OPTIMAL DESIGN TO THE SINGLE AXIS SYMMETRICAL SECTION OF THIN WALL STRUCTURAL STEEL LOADED AXIALLY IN COMPRESSION 轴心受压冷弯薄壁单轴对称截面的整体稳定优化设计
- In this paper a set of tension formulas for composite winding outside thin wall cylinder are established according to theory of cylinder shell. 本文按圆柱壳理论建立了一套在薄壁圆筒外缠绕复合材料的张力公式。
- The Deformation of thin wall tube in the process of multitool machining is analyzed by using ANSYS software. 应用有限元软件ANSYS对薄壁筒件多刀切削加工进行了变形分析,并从提高工艺刚度的角度出发,提出了相应的工艺措施。
- Energy absorption characteristic of thin walled beam type structures is of vital importance to the crashworthiness of vehicles. 车辆的抗撞性能主要取决于车辆结构中薄壁梁部件的吸能特性。
- The improved compacting tool is practical as it allows density of thin wall to increase and ensures even density over PM part. 经过改进的成形模结构,不仅提高零件薄壁段的密度,而且保证了各部位密度的均匀,具有实用价值。
- By use of the thin wall structure FEM, the system can successfully analyze the space structure and simulate the operation state of miter gates. 数据库应用将设计模块和图形绘制模块相分离;提高了系统的可靠性和编程效率;同时也有利于设计资料的保存.
- This paper analyses die casting process for shell part of thin wall,and a die-casting mould a-dopt pusher mechanism to solve the deforming problem of thin wall die-casting. 分析了薄壁壳体零件压铸的工艺性,采用顶板推出机构,解决了薄壁压铸件成型推出变形问题。
- Based on the theory of extremum method, a simple optic system was used to make on-line monitor of the growing status of thin films deposited at the end faces of optical fibers. 二、在极值法监控理论的基础上,利用简单的光纤光路系统,对光纤端面上组装的薄膜生长情况实现在线监测。
- Einstein put forward his new theory of relativity. 爱因斯坦提出了相对论的新学说。
- A number of thin cracks appeared in the wall. 墙上出现了许多细裂缝。
- Einstein's theory of relativity. 爱因斯坦的相对论。
- Investment, precision, castings, which are used in aircraft military, mail, transfer and medical machine. Systems etc. They are of thin wall complex precision stronger are smooth. Surface of minimum copper. 航空、航天、军事、通信、医疗器械等行业薄壁、复杂、精密、高强、光洁的铝合金、铜合金、不锈钢、合金钢等各类材质熔模精铸件。
- Do you agree to the wave theory of light? 你同意光的波动理论吗?
- This paper introduces a kind of thin wall part made of two kinds material by copper brazing,a pressure cutting and nobbing technology method of the manufacting high precision interal hole on the press machine. 介绍 2种材料由铜钎焊而形成的一种薄壁类零件 ,在压床上采用压削挤压加工较高精度内孔的一种工艺方法
- He cavalierly dismisses the theory of both Freud and Jung. 他傲慢武断地斥贬佛洛依德和杨格二人的理论。
- Forming of thin wall spherical parts is always a difficult point of sheet metal working technology.This paper presentsa new method for the large extra thin wall spherical parts forming technology. 薄板球面体成形一直是板料成形工艺中的难点,本文对薄壁球壳的制造提出了一种整体高能成形的新技术。
- Darwin put forth the theory of evolution,. 达尔文提出了进化论。
- The paper reviews state of the art ground pressure theory of thin slab in coal mining such as scientific concepts, foundation argumentation, theoretical development and the field application. 文章阐述了采场薄板矿压理论建模的基本思想、立论依据、理论成果及其在煤层的普通开采和放顶煤开采中的实际应用情况;