## On this page # averaging:force\_summation Last update: 31.07.2026 **Version: 0.0.0** ## Description Computes the sum of elemental forces contribution on a set of nodes in Global Coordinate System. Equivalent to MAPDL FSUM & NFORCE commands. Supports Static, Transient, Modal & Harmonic analysis for thermal and structural degrees of freedom. The moment is computed in the unit system of the data source. ## Inputs This table lists the input pins for this operator. Input pins define the data that the operator requires to perform its operation. Some inputs are required, while others are optional and provide additional configuration. Each parameter is detailed in the sections that follow the table. Pin numberNameStatusExpected type(s)0[time\_scoping](#input_0)[`scoping`](../../core-concepts/dpf-types.md#scoping), [`vector`](../../core-concepts/dpf-types.md#standard-types)**1**[nodal\_scoping](#input_1)[`scoping`](../../core-concepts/dpf-types.md#scoping), [`scopings_container`](../../core-concepts/dpf-types.md#scopings-container)**2**[elemental\_scoping](#input_2)[`scoping`](../../core-concepts/dpf-types.md#scoping), [`scopings_container`](../../core-concepts/dpf-types.md#scopings-container)**3**[streams\_container](#input_3)[`streams_container`](../../core-concepts/dpf-types.md#streams-container)**4**[data\_sources](#input_4)Required[`data_sources`](../../core-concepts/dpf-types.md#data-sources)**5**[force\_type](#input_5)[`int32`](../../core-concepts/dpf-types.md#standard-types)**6**[spoint](#input_6)[`field`](../../core-concepts/dpf-types.md#field), [`fields_container`](../../core-concepts/dpf-types.md#fields-container)**9**[scoping\_filter](#input_9)[`int32`](../../core-concepts/dpf-types.md#standard-types) ### time\_scoping (Pin 0) - **Required:** No - **Expected type(s):** [`scoping`](../../core-concepts/dpf-types.md#scoping), [`vector`](../../core-concepts/dpf-types.md#standard-types) default = all time steps ### nodal\_scoping (Pin 1) - **Required:** No - **Expected type(s):** [`scoping`](../../core-concepts/dpf-types.md#scoping), [`scopings_container`](../../core-concepts/dpf-types.md#scopings-container) Nodal Scoping or Scopings Container with a single label. Set of nodes in which elemental contribution forces will be accumulated (default = all nodes) ### elemental\_scoping (Pin 2) - **Required:** No - **Expected type(s):** [`scoping`](../../core-concepts/dpf-types.md#scoping), [`scopings_container`](../../core-concepts/dpf-types.md#scopings-container) Elemental Scoping or Scopings Container with a single label. Set of elements contributing to the force calculation. (default = all elements) ### streams\_container (Pin 3) - **Required:** No - **Expected type(s):** [`streams_container`](../../core-concepts/dpf-types.md#streams-container) Streams container. Optional if using data sources. ### data\_sources (Pin 4) - **Required:** Yes - **Expected type(s):** [`data_sources`](../../core-concepts/dpf-types.md#data-sources) Data sources. Optional if using a streams container. ### force\_type (Pin 5) - **Required:** No - **Expected type(s):** [`int32`](../../core-concepts/dpf-types.md#standard-types) Type of force to be processed (0: Total forces (static, damping, and inertia)., 1 (default): Static forces, 2: Damping forces, 3: Inertia forces) ### spoint (Pin 6) - **Required:** No - **Expected type(s):** [`field`](../../core-concepts/dpf-types.md#field), [`fields_container`](../../core-concepts/dpf-types.md#fields-container) Field or fields container of the coordinates of the point used for moment summations. Defaults to (0,0,0). If unitless, it is assumed to be in meters. ### scoping\_filter (Pin 9) - **Required:** No - **Expected type(s):** [`int32`](../../core-concepts/dpf-types.md#standard-types) Selected set of nodes. - 0 (default): Sum all nodal forces for all selected nodes, excluding contact elements - 1: Sum all nodal forces for contact nodes only. - 2: Sum all nodal forces for all selected nodes, including contact elements. ## Outputs This table lists the output pins for this operator. Output pins provide the results of the operator's computation and can be connected to inputs of other operators or retrieved for further processing. Each output is detailed in the sections that follow the table. Pin numberNameExpected type(s)0[force\_accumulation](#output_0)[`fields_container`](../../core-concepts/dpf-types.md#fields-container)**1**[moment\_accumulation](#output_1)[`fields_container`](../../core-concepts/dpf-types.md#fields-container)**2**[heat\_accumulation](#output_2)[`fields_container`](../../core-concepts/dpf-types.md#fields-container)**10**[forces\_on\_nodes](#output_10)[`fields_container`](../../core-concepts/dpf-types.md#fields-container)**11**[moments\_on\_nodes](#output_11)[`fields_container`](../../core-concepts/dpf-types.md#fields-container)**12**[heats\_on\_nodes](#output_12)[`fields_container`](../../core-concepts/dpf-types.md#fields-container) ### force\_accumulation (Pin 0) - **Expected type(s):** [`fields_container`](../../core-concepts/dpf-types.md#fields-container) ### moment\_accumulation (Pin 1) - **Expected type(s):** [`fields_container`](../../core-concepts/dpf-types.md#fields-container) ### heat\_accumulation (Pin 2) - **Expected type(s):** [`fields_container`](../../core-concepts/dpf-types.md#fields-container) ### forces\_on\_nodes (Pin 10) - **Expected type(s):** [`fields_container`](../../core-concepts/dpf-types.md#fields-container) ### moments\_on\_nodes (Pin 11) - **Expected type(s):** [`fields_container`](../../core-concepts/dpf-types.md#fields-container) ### heats\_on\_nodes (Pin 12) - **Expected type(s):** [`fields_container`](../../core-concepts/dpf-types.md#fields-container) ## Configurations This operator supports [configuration options](../../core-concepts/operator-configurations.md) that modify its behavior. ### [mutex](../../core-concepts/operator-configurations.md#mutex) - **Expected type(s):** [`bool`](../../core-concepts/dpf-types.md#standard-types) - **Default value:** false If this option is set to true, the shared memory is prevented from being simultaneously accessed by multiple threads. ## Scripting This operator can be accessed through scripting interfaces using these identifiers. **Category**: averaging **Plugin**: core **Scripting name**: force\_summation **Full name**: averaging.force\_summation **Internal name**: force\_summation **License**: any\_dpf\_supported\_increments ## Examples These examples demonstrate how to use this operator in different programming environments. Each example shows how to instantiate the operator, connect the required inputs, and retrieve the output. C++```cpp #include "dpf_api.h" ansys::dpf::Operator op("force_summation"); // operator instantiation op.connect(0, my_time_scoping); op.connect(1, my_nodal_scoping); op.connect(2, my_elemental_scoping); op.connect(3, my_streams_container); op.connect(4, my_data_sources); op.connect(5, my_force_type); op.connect(6, my_spoint); op.connect(9, my_scoping_filter); ansys::dpf::FieldsContainer my_force_accumulation = op.getOutput(0); ansys::dpf::FieldsContainer my_moment_accumulation = op.getOutput(1); ansys::dpf::FieldsContainer my_heat_accumulation = op.getOutput(2); ansys::dpf::FieldsContainer my_forces_on_nodes = op.getOutput(10); ansys::dpf::FieldsContainer my_moments_on_nodes = op.getOutput(11); ansys::dpf::FieldsContainer my_heats_on_nodes = op.getOutput(12); ``` CPython```python import ansys.dpf.core as dpf op = dpf.operators.averaging.force_summation() # operator instantiation op.inputs.time_scoping.connect(my_time_scoping) op.inputs.nodal_scoping.connect(my_nodal_scoping) op.inputs.elemental_scoping.connect(my_elemental_scoping) op.inputs.streams_container.connect(my_streams_container) op.inputs.data_sources.connect(my_data_sources) op.inputs.force_type.connect(my_force_type) op.inputs.spoint.connect(my_spoint) op.inputs.scoping_filter.connect(my_scoping_filter) my_force_accumulation = op.outputs.force_accumulation() my_moment_accumulation = op.outputs.moment_accumulation() my_heat_accumulation = op.outputs.heat_accumulation() my_forces_on_nodes = op.outputs.forces_on_nodes() my_moments_on_nodes = op.outputs.moments_on_nodes() my_heats_on_nodes = op.outputs.heats_on_nodes() ``` IPython```python import mech_dpf import Ans.DataProcessing as dpf op = dpf.operators.averaging.force_summation() # operator instantiation op.inputs.time_scoping.Connect(my_time_scoping) op.inputs.nodal_scoping.Connect(my_nodal_scoping) op.inputs.elemental_scoping.Connect(my_elemental_scoping) op.inputs.streams_container.Connect(my_streams_container) op.inputs.data_sources.Connect(my_data_sources) op.inputs.force_type.Connect(my_force_type) op.inputs.spoint.Connect(my_spoint) op.inputs.scoping_filter.Connect(my_scoping_filter) my_force_accumulation = op.outputs.force_accumulation.GetData() my_moment_accumulation = op.outputs.moment_accumulation.GetData() my_heat_accumulation = op.outputs.heat_accumulation.GetData() my_forces_on_nodes = op.outputs.forces_on_nodes.GetData() my_moments_on_nodes = op.outputs.moments_on_nodes.GetData() my_heats_on_nodes = op.outputs.heats_on_nodes.GetData() ``` ## Changelog - Version 0.0.0: Initial release.