tailieunhanh - Multibody Analysis Guide ANSYS phần 6

. bên ngoài bán kính của các Rinner xi lanh = Nội bán kính của bán kính xi lanh hoặc bên ngoài của pin Leff = Chiều dài có hiệu quả là độ dài mà các xi lanh và pin được tiếp xúc với nhau Những đóng góp đến thời điểm bình thường trong một x-trục revolute doanh như sau: | Chapter 5 Using Component Mode Synthesis Superelements in a Multibody Analysis Before proceeding prepare the full multibody model as described in Steps 1 through 4 in Overview of the ANSYS Multibody Analysis Process p. 2 . Verify that the bodies are connected to the joints as described in Connecting Bodies to Joints p. 28 . The multiple passes used in substructuring require that the files created and used in the process are handled appropriately. To aid in file management when performing a substructured multibody simulation use the FILNAME command to modify the current jobname as needed. . Step 1 Prepare the Full Model for a Substructured Multibody Analysis Prepare the full model for a substructured multibody analysis as follows Step Action Comments Command s Specify the full jobname. Example FILNAME FULL FILNAME Resume or build the full model. See Overview of the ANSYS Multibody Analysis Process and Connecting Bodies to Joints. RESUME Make components of the flexible body. Repeat for each flexible body. Create an element component of the elements of the body including any contact elements used to connect the body to a joint. Do not include the joint elements. ESEL CM Ename ELEM Select the entire model. --- ALLSEL Save the model. --- SAVE . Step 2 Create the Substructures Generation Pass Perform the generation pass to create the CMS substructure in the matrix .SUB file characterizing the dynamic flexibility of the body. You must decide how many modes to include in the CMS substructure. The number you determine depends on several factors including The driving frequency. The frequencies to be excited such as flexural axial torsional etc. . Whether displacements are of primary interest or whether stresses strains or fatigue are of primary interest. The latter require more modes to accurately capture their response. Whether impact contact is included. Impact tends to excite higher frequencies. Whether acoustic frequencies are desired. For .