Basic Analysis Guide ANSYS phần 3

Chương 2: tải tại tất cả, ANSYS sử dụng giá trị thời gian mặc định: cho bước nạp đầu tiên, và + trước thời gian cho các bước tải khác. Để bắt đầu phân tích của bạn tại thời gian "không", chẳng hạn như trong một phân tích thoáng qua, chỉ định một giá trị rất nhỏ như: Thời gian, 1E-6. | Chapter 2 Loading at all ANSYS uses the default time value for the first load step and previous time for other load steps. To start your analysis at zero time such as in a transient analysis specify a very small value such as TIME 1E-6. . Number of Substeps and Time Step Size For a nonlinear or transient analysis you need to specify the number of substeps to be taken within a load step. This is done as follows Command s DELTIM GUI Main Menu Preprocessor Loads Load Step Opts Time Frequenc Time Time Step Main Menu Solution Load Step Opts Sol n Control Basic Tab Main Menu Solution Load Step Opts Time Frequenc Time Time Step Main Menu Solution Load Step Opts Time Frequenc Time Time Step Command s NSUBST GUI Main Menu Preprocessor Loads Load Step Opts Time Frequenc Freq Substeps or Time and Substps Main Menu Solution Load Step Opts Sol n Control Basic Tab Main Menu Solution Load Step Opts Time Frequenc Freq Substeps or Time and Substps Main Menu Solution Unabridged Menu Time Frequenc Freq Substeps or Time and Substps NSUBST specifies the number of substeps and DELTIM specifies the time step size. By default the ANSYS program uses one substep per load step. . Automatic Time Stepping The AUTOTS command activates automatic time stepping. Its equivalent GUI paths are GUI Main Menu Preprocessor Loads Load Step Opts Time Frequenc Time Time Step or Time and Substps Main Menu Solution Load Step Opts Sol n Control Basic Tab Main Menu Solution Load Step Opts Time Frequenc Time Time Step or Time and Substps Main Menu Solution Load Step Opts Time Frequenc Time Time Step or Time and Substps In automatic time stepping the program calculates an optimum time step at the end of each substep based on the response of the structure or component to the applied loads. When used in a nonlinear static or steady-state analysis AUTOTS determine the size of load increments between substeps. . Stepping or Ramping Loads When specifying multiple substeps within a load .