BEAM4单元中文说明(2)

化的选项将被忽略（即SSTIF,ON是无效的），另如 SOLCONTROL 被设为ON 且 NLGEOM 也为ON时, KEYOPT(2) 会自动被设为1。

2 --

Turn off consistent tangent stiffness matrix (i.e., a matrix composed of the main tangent stiffness matrix plus the consistent stress stiffness matrix) when SOLCONTROL is ON. Sometimes it is necessary to turn off the consistent tangent stiffness matrix if the element is used to simulate rigid bodies by using a very large real constant number . KEYOPT(2) = 2 is the same as KEYOPT(2) = 0, however, KEYOPT(2) = 0 is controlled by SOLCONTROL, ON or OFF, while KEYOPT(2) = 2 is independent of SOLCONTROL.

SOLCONTROL 被设为ON时,也不用于相容切线刚度矩阵，这在单元用于通过设定一个大的实常数来仿真刚性体时是必要的。其实KEYOPT(2) = 2 与KEYOPT(2) = 0的意义是一样的, 有所区别的是 KEYOPT(2) = 0要受 SOLCONTROL为ON 或 OFF的控制, 而 KEYOPT(2) = 2 则不受 SOLCONTROL的控制。

KEYOPT(6)

Member force and moment output: 控制构件力及弯矩的输出 0 --

No printout of member forces or moments

不输出

1 --

Print out member forces and moments in the element coordinate system

输出单元坐标系下的构件的力与弯矩

KEYOPT(7)

Gyroscopic damping matrix: 控制“回转阻尼矩阵” 0 -- （只能为0，见最后产品说明） No gyroscopic damping matrix

无回转阻尼矩阵

1 --

Compute gyroscopic damping matrix. Real constant SPIN must be greater than zero. IYY must equal IZZ.

计算回转阻尼矩阵，且实常数SPIN必大于0，IYY=IZZ

KEYOPT(9)

Output at intermediate points between ends I and J:

控制I和J点中间的节点输出

N --

Output at N intermediate locations (N = 0, 1, 3, 5, 7, 9)

输出中间的N个位置（N=0，1，3，5，7，9）

KEYOPT(10)

Load location, used in conjunction with the offset values input on the SFBEAM command):

用于控制用SFBEAM指令输入荷载偏移量的输入方法

0 --

Offset is in terms of length units

以长度为单位，直接输入压力相对于I，J节点的偏移量；

1 --

Offset is in terms of a length ratio (0.0 to 1.0)

以偏移量与单元长度的比值为单位（0～1），用相对值形式输入偏移

Table 4.1 BEAM4 Real Constants

BEAM4实常数表

No. 1 2 3 4 5 6 7 8 9 Name AREA IZZ IYY TKZ TKY THETA ISTRN IXX SHEARZ Description Cross-sectional area 横截面积 Area moment of inertia 面积惯性矩 Area moment of inertia 面积惯性矩 Thickness along Z axis 沿Z轴单元厚度 Thickness along Y axis 沿Y轴单元厚度 Orientation about X axis 绕X轴的转角 Initial strain 初始应变 Torsional moment of inertia 扭转惯性矩 Shear deflection constant Z [1] 剪切变形常数Z Shear deflection constant Y [2] 剪切变形常数Y Rotational frequency (required if KEYOPT(7) = 1) 转动频率（当KEYOPT(7)=1时需设定） Added mass/unit length 附加质量/单位长度 10 SHEARY 11 SPIN 12 ADDMAS 1. SHEARZ goes with IZZ; if SHEARZ = 0, there is no shear deflection in the element Y direction.

SHEARZ与IZZ有关联，如果SHWARZ=0则表示忽略单元Y方向的剪切变形；

2. SHEARY goes with IYY; if SHEARY = 0, there is no shear deflection in the element Z direction.

SHEARY与IYY有关联，如果SHWARY=0则表示忽略单元Z方向的剪切变形；

BEAM4 Output Data BEAM4 输出数据

The solution output associated with the element is in two forms:

单元的求解结果总体为以下两部分：

Nodal displacements included in the overall nodal solution ? 节点位移含全部节点解；

?

Additional element output as shown in Table 4.2: \Definitions\.

? 单元解，细则见“BEAM4单元输出数据一览表”

?

Several items are illustrated in Figure 4.2: \.

以下是对“Figure 4.2 BEAM4应力计算结果示意图”的一些说明：

The maximum stress is computed as the direct stress plus the absolute values of both bending stresses. The minimum stress is the direct stress minus the absolute value of both bending stresses. A general description of solution output is given in Solution Output. See the ANSYS Basic Analysis Guide for ways to view results.

如图，最大应力是指轴向应力与弯曲应力绝对值之和，最小应力是指轴向应力与弯曲应力绝对值之差。有关求解输出的总体性介绍请见“Solution Output”，而有关结果内容察看的一些方法见“ANSYS Basic Analysis Guide”

Figure 4.2 BEAM4 Stress Output

The Element Output Definitions table uses the following notation: 使用单元输出信息表时应注意：

A colon (:) in the Name column indicates the item can be accessed by the Component Name method [ETABLE, ESOL]. The O column indicates the availability of the items in the file Jobname.OUT. The R column indicates the availability of the items in the results file.

以下“单元输出信息表”中第一列给出了各输出项的名称，用命令ETABLE（POST1）及ESOL（POST26）可定义这些变量用于查询。O列表示某一变量值是否在输出文件中给出，R列某一变量值是否在结果文件中给出。

In either the O or R columns, Y indicates that the item is always available, a number refers to a table footnote that describes when the item is conditionally available, and a - indicates that the item is not available.

无论是O还是R列，“Y”表示可以输出，列中的具体数值则表示在满足特定条件时才输出，而“－”则表示不输出。

Table 4.2 BEAM4 Element Output Definitions

Name EL NODES MAT VOLU: TEMP PRES Element number单元号 Element node number (I and J)单元节点-I，J Material number for the element单元材料号 Element volume单元体积 Temperatures at integration points T1, T2, T3, T4, T5, T6, T7, T8积分点上的温度 T1, T2, T3, T4, T5, T6, T7, T8 Definition O R Y Y Y Y Y Y - Y Y 3XC, YC, ZC Location where results are reported输出结果坐标 Y Y Pressure P1 at nodes I, J; OFFST1 at I, J; P2 at I, J; OFFST2 Y Y at I, J; P3 at I, J; OFFST3 at I, J; P4 at I; P5 at J 压力P1 at nodes I, J; 偏移量1 at I, J; 压力P2 at I, J; 偏移量2 at I, J; 压力P3 at I, J; 偏移量3 at I, J; 压力P4 at I; 压力P5 at J SDIR SBYT SBYB SBZT SBZB SMAX SMIN EPELDIR EPELBYT EPELBYB EPELBZT EPELBZB EPTHDIR Axial direct stress轴向正应力 Bending stress on the element +Y side of the beam 梁内单元+Y面上的弯曲应力 1111Bending stress on the element -Y side of the beam 梁内单元-Y面上的弯曲应力 11Bending stress on the element +Z side of the beam 梁内单元+Z面上的弯曲应力 11Bending stress on the element -Z side of the beam 梁内单元-Z面上的弯曲应力 11Maximum stress (direct stress + bending stress) 最大应力(正应力+弯曲应力) 11Minimum stress (direct stress - bending stress) 最小应力(正应力-弯曲应力) 11Axial elastic strain at the end 端部轴向弹性应变 11Bending elastic strain on the element +Y side of the beam 梁内单元+Y面上的弯曲弹性应变 11Bending elastic strain on the element -Y side of the beam 梁内单元-Y面上的弯曲弹性应变 11Bending elastic strain on the element +Z side of the beam 11梁内单元+Z面上的弯曲弹性应变 Bending elastic strain on the element -Z side of the beam 梁内单元-Z面上的弯曲弹性应变 11Axial thermal strain at the end 11

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