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 # RASpringDashpotMoment

 Last update: 17.07.2025 

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### *class* RASpringDashpotMoment

Rocky PrePost Scripting wrapper representing a Spring-Dashpot Moment motion.

Retrieve this specific wrapper after setting the correct motion type on a [`RAMotion`](RAMotion.md#generated.RAMotion). For example:

```python
motions = motion_frame.GetMotions()
motion_1 = motions.New()
motion_1.SetType('Spring-Dashpot Moment')
spring_moment = motion_1.GetTypeObject()

```

**Methods:**

NameDescription[`GetDashpotCoefficient`](#generated.RASpringDashpotMoment.GetDashpotCoefficient)(\[unit\])Get the value of "Dashpot Coefficient".[`GetDirection`](#generated.RASpringDashpotMoment.GetDirection)()Get "Direction" as a string.[`GetSpringCoefficient`](#generated.RASpringDashpotMoment.GetSpringCoefficient)(\[unit\])Get the value of "Spring Coefficient".[`GetValidDirectionValues`](#generated.RASpringDashpotMoment.GetValidDirectionValues)()Get a list of all possible values for "Direction".[`SetDashpotCoefficient`](#generated.RASpringDashpotMoment.SetDashpotCoefficient)(value\[, unit\])Set the value of "Dashpot Coefficient".[`SetDirection`](#generated.RASpringDashpotMoment.SetDirection)(value)Set the value of "Direction".[`SetSpringCoefficient`](#generated.RASpringDashpotMoment.SetSpringCoefficient)(value\[, unit\])Set the value of "Spring Coefficient".<a id="generated.RASpringDashpotMoment.GetDashpotCoefficient"></a>

#### GetDashpotCoefficient(unit: Optional\[str\] = None)

Get the value of “Dashpot Coefficient”.

- **Parameters:****unit** – The unit for the returned value. If no unit is provided, the returned value will be in “Nms/rad”.

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#### GetDirection()

Get “Direction” as a string.

- **Returns:**The returned value will be one of \[‘none’, ‘x’, ‘y’, ‘xy’, ‘z’, ‘xz’, ‘yz’, ‘xyz’\].

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#### GetSpringCoefficient(unit: Optional\[str\] = None)

Get the value of “Spring Coefficient”.

- **Parameters:****unit** – The unit for the returned value. If no unit is provided, the returned value will be in “Nm/rad”.

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#### GetValidDirectionValues()

Get a list of all possible values for “Direction”.

- **Returns:**The returned list is \[‘none’, ‘x’, ‘y’, ‘xy’, ‘z’, ‘xz’, ‘yz’, ‘xyz’\].

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#### SetDashpotCoefficient(value: Union\[str, float\], unit: Optional\[str\] = None)

Set the value of “Dashpot Coefficient”.

- **Parameters:**
    - **value** – The value to set. This value can be an expression with input variables or float type.
    - **unit** – The unit for value. If no unit is provided, value is assumed to be in “Nms/rad”.

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#### SetDirection(value: str)

Set the value of “Direction”.

- **Parameters:****value** – The value to set. Must be one of \[‘none’, ‘x’, ‘y’, ‘xy’, ‘z’, ‘xz’, ‘yz’, ‘xyz’\].
- **Raises:****RockyApiError** – If value is not a valid “Direction” option.

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#### SetSpringCoefficient(value: Union\[str, float\], unit: Optional\[str\] = None)

Set the value of “Spring Coefficient”.

- **Parameters:**
    - **value** – The value to set. This value can be an expression with input variables or float type.
    - **unit** – The unit for value. If no unit is provided, value is assumed to be in “Nm/rad”.