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full_syntax [2018/05/08 11:21]
marijn.nijenhuis [5. Optional] |
full_syntax [2019/10/10 13:47]
marijn.nijenhuis |
| | ''displ_initial_z'' | double | Prescribed initial<sup>*</sup> displacement (in unit m) in ''z''-direction. Value is the target ''z''-coordinate of the node position (in global frame). | | | ''displ_initial_z'' | double | Prescribed initial<sup>*</sup> displacement (in unit m) in ''z''-direction. Value is the target ''z''-coordinate of the node position (in global frame). | |
| |
| | **Prescribed rotation:** |
| | ^ Field ^ Value ^ Description ^ |
| | | ''rot'' | 1x4 vector | Prescribed rotation. Values represent the target orientation of the node in 3-D space, according to the [[https://en.wikipedia.org/wiki/Rotation_formalisms_in_three_dimensions#Euler_axis_and_angle_.28rotation_vector.29|axis-angle notation]]. The first value represents the rotation angle (in radians) and the second to fourth values the normalized axis of rotation, all with respect to the global frame. Note that this input complete defines and constrains the orientation of the node, i.e. no other simultaneous rotations of the node are possible. | |
| | | ''rot_initial'' | 1x4 vector | Prescribed initial<sup>*</sup> rotation. Values represent the target orientation of the node in 3-D space, according to the [[https://en.wikipedia.org/wiki/Rotation_formalisms_in_three_dimensions#Euler_axis_and_angle_.28rotation_vector.29|axis-angle notation]]. The first value represents the rotation angle (in radians) and the second to fourth values the normalized axis of rotation, all with respect to the global frame. Note that this input complete defines and constrains the orientation of the node, i.e. no other simultaneous rotations of the node are possible. | |
| |
| **Applied loads:** | **Applied loads:** |
| - the last load step is due to both the full initial and full standard load. | - the last load step is due to both the full initial and full standard load. |
| |
| The same holds for prescribing //standard// displacement (''displ_{x,y,z}'') and //initial// displacement (''displ_initial_{x,y,z}''). | The same holds for prescribing //standard// displacement (''displ_{x,y,z}''), //initial// displacement (''displ_initial_{x,y,z}''), //standard// rotation (''rot'') and //initial// rotation (''rot_initial''). |
| ==== 4. Element properties ==== | ==== 4. Element properties ==== |
| |
| | ''silent'' | ''true'' | Activation of 'silent' mode of SPACAR Light. In the silent mode, the input arguments (''nodes'', ''elements'', ''nprops'', ''eprops'', ''rls'') are not validated and not checked for errors (improving speed). Also, visualization after simulation is turned off. This feature can be useful when e.g. running a lot of SPACAR Light simulations in an optimization or iteration loop. | | | ''silent'' | ''true'' | Activation of 'silent' mode of SPACAR Light. In the silent mode, the input arguments (''nodes'', ''elements'', ''nprops'', ''eprops'', ''rls'') are not validated and not checked for errors (improving speed). Also, visualization after simulation is turned off. This feature can be useful when e.g. running a lot of SPACAR Light simulations in an optimization or iteration loop. | |
| | ''calcbuck'' | ''true'' | Calculation of buckling loads. Multipliers with respect to the combined applied load are returned. Input displacements cannot be used with this option. It is recommended to only apply a single force or moment to the system. Note that the loads ''nprops(i).force'' and ''nprops(i).moment'' are applied in (linearly increasing) steps: they only reach the user-specified value at the last step. The multipliers are calculated with respect to the current load at each of these steps. | | | ''calcbuck'' | ''true'' | Calculation of buckling loads. Multipliers with respect to the combined applied load are returned. Input displacements cannot be used with this option. It is recommended to only apply a single force or moment to the system. Note that the loads ''nprops(i).force'' and ''nprops(i).moment'' are applied in (linearly increasing) steps: they only reach the user-specified value at the last step. The multipliers are calculated with respect to the current load at each of these steps. | |
| | ''calccompl'' | ''true'' | Calculation of compliance matrices of the nodes.| | | ''calccompl'' | ''false'' | Disable calculation of compliance matrices of the nodes.| |
| | ''gravity'' | 1x3 vector | Loads due to gravity. Values represent the components of the gravitational acceleration in ''x''-, ''y''-, and ''z''-direction (in unit m/s<sup>2</sup>). For example: ''[0 0 -9.81]''. | | | ''gravity'' | 1x3 vector | Loads due to gravity. Values represent the components of the gravitational acceleration in ''x''-, ''y''-, and ''z''-direction (in unit m/s<sup>2</sup>). For example: ''[0 0 -9.81]''. | |
| | ''loadsteps'' | integer | Number of load steps used in the simulation and visualization. If not specified, the default number of 10 load steps is used. For creating smooth plots and visualizations, you may want to increase this number. For optimization purposes, you may want to reduce this number to increase computational speed. For well-conditioned problems, a single load step is still feasible. For ill-conditioned problems (involving large loads, large prescribed displacements, or buckling ), a larger number of load steps is required for the simulation to converge. | | | ''loadsteps'' | integer | Number of load steps used in the simulation and visualization. If not specified, the default number of 10 load steps is used. For creating smooth plots and visualizations, you may want to increase this number. For optimization purposes, you may want to reduce this number to increase computational speed. For well-conditioned problems, a single load step is still feasible. For ill-conditioned problems (involving large loads, large prescribed displacements, or buckling ), a larger number of load steps is required for the simulation to converge. | |
