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ANSYS Coupled-Field Analysis Guide phần 8

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Bạn có thể sử dụng lệnh EMTGEN để tạo ra một thiết lập phân phối của TRANS126 các yếu tố giữa các bề mặt của một cấu trúc chuyển động và một mặt phẳng (tức là mặt đất). Sự sắp xếp này cho phép kết đầy đủ mô phỏng | Section 7.8 Electromechanical Analysis Figure 7.2 Reduced Order Model Voltage Source C0MBIN14 or COMBIN39 You can use the EMTGEN command to generate a distributed set of TRANS126 elements between the surface of a moving structure and a plane i.e. ground plane . This arrangement allows for fully coupled electrostatic-structural simulations for cases where the gap is small compared to the overall area of the structure. Typical applications include accelerometers switches and micromirror devices. See the ANSYS Commands Reference for more information on the EMTGEN command. The TRANS126 element supports motion in the nodal X Y and Z directions. You can combine multiple elements to represent a full 3-D translational response of a device. Accordingly you can model an electrostatic-driven structure by a reduced order element that fully characterizes the coupled electromechanical response. You can link the transducer element into 2-D or 3-D finite element structural models to perform complex simulations for large signal static and transient analysis as well as small signal harmonic and modal analysis. See Section 7.15 Sample Electromechanical Analysis Batch or Command Method for a sample electromechanical analysis using the TRANS126 transducer element. 7.8.I.3. Static Analysis For a static analysis an applied voltage to a transducer will produce a force which acts on the structure. For example voltages applied V1 V2 to the electromechanical transducer elements TRANS126 will produce an electrostatic force to rotate the torsional beam shown in Figure 7.3 Micromirror Model . Figure 7.3 Micromirror Model The static equilibrium of an electrostatic transducer may be unstable. With increasing voltage the attraction force between the capacitor plates increases and the gap decreases. For a gap distance d the spring restoring ANSYS Coupled-Field Analysis Guide. ANSYS Release 10.0.002184. S.4S IP Inc. 7-17 Chapter 7 Direct Coupled-Field Analysis force is proportional to 1 d and the .