workbench求模态应变能脚本

对于ANSYS Workbench软件，可以通过下面的脚本来计算模态应变能：

! ------------------------------------------------------------------------------
! Script to calculate Modal Strain Energy (MSE) for a given mode
! ------------------------------------------------------------------------------
! Define the mode number for which MSE needs to be calculated
nmode = 1

! Get the displacement data for the selected mode
*get,disp_data,node,all,mode,nmode,u

! Get the element data for the selected mode
*get,elem_data,elem,all,mode,nmode,ep

! Get the number of elements in the model
*get,num_elem,elem,,count

! Get the material properties for the model
*get,mat_data,mat,,all,mat_prop

! Define the variables to store the MSE and the element strain energy
mse = 0
e_se = 0

! Loop through all the elements in the model
do i=1,num_elem

  ! Get the element type and the number of integration points
  *get,elem_type,elem,i,type
  *get,num_ip,elem,i,nint

  ! Loop through all the integration points in the element
  do j=1,num_ip

    ! Get the integration point coordinates and weights
    *get,ip_coord,elem,i,ip,j,loc
    *get,ip_weight,elem,i,ip,j,wgt

    ! Evaluate the strain energy at the integration point
    *get,ip_strain_energy,elem,i,ip,j,strain_energy

    ! Calculate the element strain energy
    e_se = ip_strain_energy * ip_weight

    ! Add the element strain energy to the total MSE for the mode
    mse = mse + e_se

  enddo

enddo

! Output the Modal Strain Energy (MSE) for the selected mode
*cfopen,mse.txt
*vwrite,'Modal Strain Energy for Mode ',nmode,' is ',mse
*cfclose

这个脚本首先定义了要计算的模态号，然后获取了该模态下的节点位移和单元应变能数据。随后，它循环遍历了所有的单元和积分点，计算出每个积分点的应变能，并将其叠加到总的模态应变能中。最后将结果输出到文本文件mse.txt中。需要注意的是，这个脚本中的计算过程假设了单元的材料参数是均匀的，并且单元的形状是规则的。如果模型中存在非均匀材料或者非规则形状的单元，需要修改计算过程以考虑这些因素的影响。