{"id":161036,"date":"2021-08-05T06:38:28","date_gmt":"2021-08-05T06:38:28","guid":{"rendered":"\/forum\/forums\/topic\/why-the-acceleration-time-history-output-from-ansys-using-newmark-method-is-average\/"},"modified":"2023-09-25T10:09:28","modified_gmt":"2023-09-25T10:09:28","slug":"why-the-acceleration-time-history-output-from-ansys-using-newmark-method-is-average","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/why-the-acceleration-time-history-output-from-ansys-using-newmark-method-is-average\/","title":{"rendered":"Why the acceleration time history output from ansys using Newmark method is average?"},"content":{"rendered":"
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I perform the transient analysis of a structure in ANSYS by Newmark method. At the same time, conduct the Newmark integration method in matlab based on the same structure. And then, export the acceleration time history of the same degree of freedom from ansys and matlab. I find that the figure of acceleration time history from matlab can't match with the figure of acceleration time history from ansys. And, the value at the peak of matlab is larger than the value of ansys. Then, the average value of the acceleration values at two adjacent moments of matlab is taken as the acceleration value at that moment to get a new acceleration time history, which is matched well with the results of ansys. So, why? why the acceleration time history out put from ansys is averaged? Can you give me some explanations and tell me how to solve this problem? Thanks.<\/p>\n","protected":false},"template":"","class_list":["post-161036","topic","type-topic","status-closed","hentry","topic-tag-apdl","topic-tag-explicit-dynamics","topic-tag-transient","topic-tag-transient-analysis","topic-tag-transient-structural"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t