The main results show that : ( 1 ) the mechanism of laser bending is very different from that in bending with hard tools . ( 2 ) the bending angle is varied along scanning direction , and there is a deformation wave in the process . ( 3 ) the effects of sheet length on bending can be neglected while the length is more than 10 times of thickness . ( 4 ) the sheet width has much higher influence on the bending process 分析发现：激光弯曲成形时板料的应力状态与机械折弯时有根本不同；当激光束沿直线单向扫描时，板料两端的弯曲角度不同；板料的长度大于10倍板厚或5倍光斑尺寸时，板长对弯曲角度的影响不再显著；沿扫描方向，距离光斑中心3倍光斑尺寸以外的区域，仍然对弯曲变形量产生影响。
There is one other alternative - one that takes both skilled and courage : forgoing any cradling action , grasp the cone more firmly between thumb and forefinger and extend the other fingers so that they are out of the way of the dripping from the bottom , then increase the waist - bend angle from twenty - five to thirty - five degrees , and then eat the cone , allowing it to drip out of the bottom onto the ground in front of you 还有另一种选择,但那既需要技巧也需要勇气,即:在进行任何补救措施之前,以拇指和食指牢牢夹住蛋筒,并翘起其他手指以免粘上蛋筒底端的冰激凌,然后上身倾度由25度变为35度,再吃蛋筒,随它在你跟前漏洒到地上
There ' s one other alternative - one that takes both skilled and courage : forgoing any cradling action , grasp the cone more firmly between thumb and forefinger and extend the other fingers so that they are out of the way of the dripping from the bottom , then increase the waist - bend angle from twenty - five to thirty - five degrees , and then eat the cone , allowing it to drip out of the bottom onto the ground in front of you 还有另一种选择,但那既需要技巧也需要勇气,即:在进行任何补救措施之前,以拇指和食指牢牢夹住蛋筒,并翘起其他手指以免粘上蛋筒底端的冰漠淋,然后上身倾度由25度变为35度,再吃蛋筒,随它在你跟前漏洒到地上
Along with the progress of drilling technology , many new types of bha such as steering motor assembly , dropping assembly with eccentric bend sub , dropping assembly with flexible connection are developed based on common building , dropping and holding assemblies . for using these bha , a new mathematical model is put forward for 3d static analysis of these types of bha under small deflection . and its weighted residual solution is given . the mathematical model includes ( 1 ) differential equations ; ( 2 ) boundary conditions at drill bit , stabilizer , bend angle , diameter change , tangential point and borehole wall ; ( 3 ) lateral forces and deflection angles of bit . the software based upon this method runs well 为了更好地应用各种新钻具，建立了适用于对普通下部钻具、导向钻具、带偏心弯接头和柔性接头的下部钻具进行三维小挠度静力学分析的数学模型，包括( 1 )微分方程； ( 2 )钻头、稳定器、弯角、变截面、切点和井壁的边界条件； ( 3 )钻头的侧向力和钻头转角.给出了该模型的加权余量解.用该方法编写的软件应用效果良好
