> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ntop.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Parametric FE Model

## About this Block

The **Parametric FE Model** block is used in field optimization to optimize one or more Parametric FE Components. The **Parametric FE Model** works similar to the [Simulation Model](/block-documentation/blocks/structures/model/simulation-model.html) block; however, it requires one or more FE domains to be a Parametric FE Domain.

**Common uses:**

* This block is used as an input to **Field Optimization** block

**Tips:**

* If you want a solid domain that is not optimized during the field optimization process, then a Solid Domain can be placed in the Parametric FE Domains list.
* **Note:** The Solid Domain will not be "optimized" but will act as a solid passive region.
* Each Parametric FE Domain has one FE Mesh and at least one FE Attribute.
* A Parametric FE Model does not need a connector if only one FE Domain exists.
* A **Parametric FE Domain** block can auto convert (called autocast) to a **Parametric FE Model** when it is used as an input that requires a **Parametric FE Model**. This is useful for single domain setups.

***

Combine a list of Parametric FE Domains and corresponding Connectors into a Parametric FE Model. The block performs checks to determine whether all objects are restrained properly.

### Inputs

| Name       | Type                                                                                    | Description                                   |
| ---------- | --------------------------------------------------------------------------------------- | --------------------------------------------- |
| Domains    | [Parametric FE Domain List](../../../../block-documentation/types/parametric-fe-domain) | The Parametric FE Domains in the model.       |
| Connectors | [Connector List](../../../../block-documentation/types/connector)                       | The connectors and interactions in the model. |

### Outputs

| Type                                                                             |
| -------------------------------------------------------------------------------- |
| [Parametric FE Model](../../../../block-documentation/types/parametric-fe-model) |