Study on production technology of profiled PET DTY;
异形涤纶DTY生产工艺探讨
Study on the production process of profiled POY fiber;
异形截面POY生产工艺探讨
The National Conference Center project has a complicated structure form,varied curvy shape,diversified cylinder columns and special-shaped components.
国家会议中心工程结构形式复杂,立面造型曲面多变,圆柱和异形构件变化多样,使用常规测量手段难以满足精度要求。
Though the calculation of a piece of box culvert with a special-shaped structure the paper compares the difference between the traditional calculation method and solid finite element calculation.
通过对一块异形结构箱涵的计算,比较了传统计算方法与实体有限元计算的差异;分析了箱涵出入口断面与道路路线夹角在不同角度下的箱涵上部结构受力情况,给出了相对合理的最小夹角值;对出入口处有斜交的箱涵结构添加栅格梁进行计算,分析了栅格梁对箱涵结构受力的影响和作用。
In the recent years, steel-reinforced concrete (SRC) structure and special-shaped column structure are being applied more widly than before in buildings in China.
近年来国内型钢混凝土与异形柱结构的应用日渐广泛,大量的研究成果已经证明了这两种结构体系的优点和适用性。
The die swelling of polycarbosilane and the profile degreeof Y-shaped SiC fibers;
聚碳硅烷的挤出胀大与Y型SiC纤维的异形度
The results showed that the profile degree of the nascent PAN fiber was decreased and the sonic velocity and mechanical properties were raised firstly and then dropped while raising the coagu.
结果表明:随着凝固浴浓度的升高,PAN初生纤维的异形度降低,声速和力学性能均先升高后降低;随着凝固浴温度的升高,PAN初生纤维的异形度增大,声速和力学性能均降低;随着喷丝头拉伸比的增加,PAN初生纤维的异形度增加,声速和力学性能也都呈上升趋势,随着后拉伸的进行,三角形PAN纤维的异形度基本保持不变,其力学性能和声速均逐渐升高。
The produced fiber had profile degree above 45% and exhibited qualified properties.
2%, 紧张热定型温度160℃,可生产成品异形度大于45%,各项性能指标合格的产品。
Study on the trial production technology of "H"shaped profiled fiber;
“H”形异形纤维的试生产工艺探讨
Effects of spinning technique and profiles of profiled fibers on their performances;
纺丝工艺及截面形状对异形纤维性能的影响
The explicit dynamic finite element analysis software ANSYS/LS-DYNA was used to simulate the two rollers double-pass roll extrusion process of square shaped tube.
利用显示动力学有限元法模拟了异形管两辊双道次成型过程,结合实验对异形管两辊双道次成型过程中轧制道次与轧制力的关系、轧制力与轧制速度的关系、轧制力与壁厚的关系、轧制力与摩擦系数的关系、轧制力与辊轮大小的关系等方面进行了分析,模拟结果与实验结果相符。