光弹

This project is intended to modify circular disk loaded in diametral compression method, from concentric load to distributed load on a small area to reduce error. Firstly, we will establish digital Photoelasticity system, manufacture specimen, design loading frame, and then the experiment will completed.

本计画主要目的在减少误差而修正圆盘试片受上下压力实验法的数学理论依据，负载从集中力改为有限范围的均布力，经过理论推导后，以自行组合之数位光弹仪实验比较两者求出的材料条纹系数值。

In photoelastic stress analysis, the accuracy of analysis can be improved by using fractional isochromatic fringes, so it is very important to study the approach for producing fractional fringes.

在光弹应力分析中，利用分数级条纹可以提高分析精度，于是，产生分数级条纹的方法研究就变得非常重要。

For proving the method which is used to identify isochromatic fringe orders, the experimental model is devised when stress wave is reflected at the free boundary of the hole.

过去研究主要依靠动光弹进行，获得的数据是主应力差的资料，目前其判读是以Durelli〔1〕的研究基础发展而来的，随后朱振海〔2

This paper describes the experimental results of the Tangshan earthquake which are in reasonable agreement with the seismological and geological data of the Tangshan districtt 1,Isopach and isochromatic fringe patterns of the Tangshen structures show three areas of strees c...

唐山等和线和等差线条纹图显示出三个应力集区，与唐山的主震和余震位置一致。2。唐山主应力轨迹线方向为东北方向。这个方向与华北现代构造应力场主压应力方向一致。激光全息光弹实验方法可以用来探讨不同的构造形态在不同边界条件下的应力分布和变化，从而为较大地震预报提供线索。

In the crossed plane polariscope, by rotating the polarizer and the analyser at constant rate in synchronism and recording images by a CCD camera continuously, four phase-shifted images whose intensity are integrated by sensors are obtained.

在正交偏振光场下，按一定速度同步旋转起偏镜和分析镜，CCD摄像机可连续获取四幅相移光弹图像，由CCD像敏单元积分获得其光强值，通过所提出的相移法运算，可以迅速地得出全场等倾角和等差线的相位值。

And by using photoelastic and thermal photoelastic method, the experiment and research is made.

为提高连铸机拉矫辊的使用寿命，提出了新型复合式拉矫辊结构，在对其应力分析的基础上，进行了结构尺寸优化设计，并进行了光弹及热光弹性实验研究。

By now the violent light bullets form the giant crowded light arrow and fly to the hawk on my top of the head.

这时猛烈的光弹形成巨大密集的光箭朝头顶上掠过的飞鹰号飞去。

Night is encircled ring upon ring, which seems to be very mysterious, but i knew violence and happiness of the city are behind the deep forest.i am groping for standing firm in the thick growth of glass.after supporting an old camara and taking a flash-light, i had a strong feeling that i am attacking everything with a rocket gun and luminous grenades not the camara .

夜的帷幕一重重，似乎很神秘，但我知道，在一重重森林的背后，是城市的刀枪剑戟和欢歌笑语。我摸索着在草丛站稳，架上哈苏，手拿闪灯，我感觉自己是架上一门大炮，手拿一枚夜光弹，向这一切轰击，于是——光闪过，一个或一个个无助的生灵裸露在我面前。

I am groping for standing firm in the thick growth of glass.After supporting an old camara and taking a flash-light, I had a strong feeling that I am attacking everything with a rocket gun and luminous grenades not the camara . Shooting star ts.In front of me are various helpless living.

我摸索着在草丛站稳，架上哈苏，手拿闪灯，我感觉自己是架上一门大炮，手拿一枚夜光弹，向这一切轰击，于是——光闪过，一个或一个个无助的生灵裸露在我面前。

I am groping for standing firm in the thick growth of glass.After supporting an old camara and taking a flash-light, I had a strong feeling that I am attacking everything with a rocket gun and luminous grenades not the camara . Shooting starts.In front of me are various helpless living.

我摸索着在草丛站稳，架上哈苏，手拿闪灯，我感觉自己是架上一门大炮，手拿一枚夜光弹，向这一切轰击，于是――光闪过，一个或一个个无助的生灵裸露在我面前。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。