[offshore112]

1.The X, Y and Z rotational degrees of freedom are restrained by ‘000111’ in columns 55-60. (Because solid elements do not have rotational stiffness, the rotational degrees of freedom for joints connected exclusively to solid elements must be fixed. SACS中的固体单元只有三个位移方向的自由度？)
2.cable element是什么单元？可否在吊装中使用此单元作为吊索？！（之前一直用gap单元模拟吊索）用于确定CABLE刚度的预张力如何确定？
3.关于SHEAR AREA FACTOR FOR TUBULAR MEMEBERS：For tubular members, the factor with which to multiply the cross section area for purposes of shear stress calculations, may be input on the GRUP line in columns 65-69 or on the MEMBER line in columns 60-64. The following specifies a shear area modifier of 0.5 for member 101-501（管子杆件的截面X系数仅仅对剪切应力的计算有影响？是否对拉应力有影响？）


关于K-FACTORS/EFFECTIVE BUCKLING LENGTH：K-factors or effective buckling length, but not both, may be specified for buckling about the local Y and Z axes. K-factors are specified on the pertinent GRUP line in columns 52-59 but may be overridden on the MEMBER line in columns 52-59.
When K-factors are used, the effective buckling length is calculated as the K-factor multiplied by the actual member length. When effective lengths are specified on the MEMBER line, ‘L’ must be input in column 47. The effective buckling length is then determined using the K-factor from the GRUP line multiplied buckling length specified. （如果K在GRUP LINE定义，有效长度在MEMBER LINE定义，最终的屈曲长度=GRUPLINE里的K*MEMBERLINE里的Lb？为什么屈曲长度不是有效长度？欧拉公式里不是已经有K了吗？）
The following defines members 101-201 and 201-301. The effective buckling length for member 101-201 is determined using the K-factors specified for group T01 since no Kfactors are specified on the MEMBER line. The effective length for member 201-301 is determined using the buckling length on the MEMBER line and the K-factors specified for group T01.




关于UNBRACED LENGTH OF COMPRESSION FLANGE：The distance between bracing against twist or lateral displacement of the compression flange for use in calculating bending allowable stresses for non-tubular members, may be input on the GRUP or MEMBER line in columns 60-64. The default is the member length.
The following designates that the unbraced length of the compression flange for member 101-201 is 5.
Note: Values specified on the MEMBER line override values specified on the GRUP line.（定义非管子截面的杆件的面板的弯曲应力的有效长度？区别于屈曲时的有效长度？）

[oceanrig]

基本上是这样的，在abaqus里面也基本如此