stiffening rings meaning in English

刚性环
加强圈

Effect of stiffening rings on the characteristics of the vibration and sound field radiated by an axisymmetric shell
环肋对两端带半球帽圆柱壳声振特性的影响
Abstract : mechamical calculation method for jacket vessel with spiral plate , spiral plate setting and strength check were discussed , it shows that spiral plate can be used as stiffening ring
文摘:介绍带螺旋导流板的夹套容器强度计算方法、螺旋导流板的设置及强度校核等，螺旋导流板可起到加强圈的作用。