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    The analysis of theory of "Rheology-Mutation" in building fire
    建筑火灾“流变—突变”分析
    Owing to the viscoelasticity behavior of concrete, it is better to use the theory of rheology.
    混凝土具有粘弹性质,应用流变理论较为适宜。
    Research of the key parts in extrusion die was based on the theory of rheology of the polymer melt and the thermodynamics, the paper established the mathematic models for the design of the key parts in extrusion die.
    本文通过对挤出模头中几个关键部位的结构分析,以聚合物流变学为基础、热力学为基础,并结合材料力学,对挤出模中这些关键部位的设计给出了理论模型。
    In this paper research of functional block structure was based on the theory of rheology of the polymer melt and the basic requirement of extrusion die channel.
    本论文对于功能块的研究,是以聚合物熔体的流变学理论,以及挤出模头流道的基本要求为基础。
    Focusing on above ideas, the author finishes following work:Firstly, the flowing state of the concrete is deeply analyzed by means of the theory of rheology, and a concrete resistant equation is set up in the pipe and the pressure on concrete is figured out;
    1.基于流变力学原理,深入分析了泵送混凝土在输送管内的流动状态,建立了混凝土在输送管中的阻力方程,计算出混凝土泵送压力;
    The following main achievements were yielded:(1) Based on process characteristics of gas-assisted full slip extrusion molding and the theories of rheology and hydrokinetics etc. , under reasonable assumption, full three dimension steady isothermal viscoelastic theoretical model of describing gas-assisted extrusion molding process is established.
    (1) 针对气辅完全滑移挤出成型过程的特点,基于流变学和流体动力学理论,经合理假设,建立了描述气辅完全滑移挤出成型过程的全三维稳态等温粘弹性理论数学模型。
 

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