摩擦热点

对压力和剪力作用下丁羟推进剂（HTPB）和高能推进剂（NEPE）裂纹摩擦热点形成过程进行了数值计算。

The processes of hot-spots formations of cracks friction in solid propellants under normal pressure and shear stress , are analyzed numerically .

固体推进剂裂纹摩擦热点形成细观模型分析

Meso-scale Hot-spot Model of Crack Friction in Solid Propellant

利用断裂力学、热传导、推进剂热分解动力学方法，建立裂纹摩擦热点细观模型。

In view of the fracture mechanics , heat conduction and dynamics of thermal decomposition of solid propellant , the meso-scale hot-spot model of crack friction was established .

对与裂纹摩擦热点形成相关的物理、化学过程进行分析研究，提出了裂纹摩擦热点细观模型，推导建立了热点形成和发展控制方程。

Based on analysis of physical and chemical phenomena related with hot-spots formation of crack friction , the meso-scale hotspot model is put forward , control equations for hot-spot formation and development are derived .

以机械撞击载荷下固体推进剂裂纹摩擦热点细观模型为基础，结合热粘弹理论和动力有限元法，分析计算发动机结构撞击变形及装药内部热点形成，确定产生高温热点撞击临界速度。

Based on meso-scale hot-spot model of solid propellant , with application of thermo-viscoelasticity and hydrodynamic finite elements method , be studied the deformation of SRM and hot-spot formation in the grain , and determined the critical impact velocity for propellant ignition .

发展中国家不断出现摩擦新热点。

New frictions have been triggered in developing countries .

分析机械撞击载荷作用下复合固体推进剂内部裂纹摩擦形成热点过程。

The study was conducted to investigate how the hot-spot formation was caused by crack friction in composite solid propellant under mechanic impact .

反倾销问题是我国同欧共体、美国和其它一些国家贸易摩擦的热点，而且今后还会不断发生。

Anti-dumping is the hotspot to cause trade friction between European Economic Community , America and some other countries , and it will arise ceaselessly .

本文根据固体推进剂细观结构特征及撞击载荷作用下的损伤破坏模式，结合相关理论分析结果，将裂纹摩擦作为推进剂热点形成的关键因素。

According to the meso-scale structural characteristics of composite solid propellants ( CSP ), the damage modes in CSP induced by mechanical impacts , and the conclusions of former research , crack friction is considered to be the key factor for CSP hot-spots .

通过模型数值计算，探讨推进剂裂纹摩擦产生高温热点的过程和条件。分析计算表明裂纹摩擦和扩展可导致推进剂形成高温热点。

By making numerical calculation of the model , the process and condition for hot-spot formation were discussed , from which it is concluded that friction between crack surfaces slip and crack growth can lead to formation of hot-spot in composite solid propellant .

第二章分析了中美贸易摩擦的现状，以及当前中美贸易摩擦的热点问题和新特点。

The second part is mainly analyzed the situation , the hot topics and the new features of Sino-U.S. trade fiction in current days .