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一、在薄壁结构的分析中,扭心(扭转中心),剪心(剪切中心),挠心(挠曲中心或弯曲中心),或主扇性极点等代表不同概念的不同名称都是指杆件截面上同一个点,通过该点作用于杆件的横向力只产生截面的挠曲,而不产生扭转;而围绕该点作用的横向力偶,由于通过该点的横向力的合力为零,故只产生扭转而不产生挠曲。
First, in the analysis of thin-walled structures, different names representing different concepts, such as torsional center (torsional center), shear heart (shear center), flexural center (flexural center or bending center), or main fanial pole Refers to the same point in the cross section of the rod through which the lateral force acting on the rod produces only the flexure of the section without torsion, whereas the lateral force even around this point, due to the resultant of the lateral force passing through this point, is Zero, so only produce torsion without deflection.