Frequency Dependent Spring and Damper Property
Description: Defines the frequency or force dependent properties for a generalized spring and damper structural element.
Format:
Example:
| Field | Definition | Type | Default |
|---|---|---|---|
| PID | Property identification number that matches the identification number on a PBUSH entry. | Integer > 0 | Required |
| K | Symbol indicating that the next 1 to 6 fields are stiffness frequency table identification numbers. | Character | |
| TKIDi | Identification number of a TABLEDi entry that defines the stiffness versus frequency relationship. | Integer ≥ 0 | 0 |
| B | Symbol indicating that the next 1 to 6 fields are force per unit velocity frequency table identification numbers. | Character | |
| TBIDi | Identification number of a TABLEDi entry that defines the force per unit velocity damping versus frequency relationship. | Integer ≥ 0 | 0 |
| GE | Symbol indicating that the next field is the structural element damping frequency table identification number. | Character | |
| TGEIDi | Identification number of a TABLEDi entry that defines the structural element damping versus frequency relationship. | Integer ≥ 0 | 0 |
| KN | Symbol indicating that the next 1 to 6 entries are nonlinear force deflection table identification numbers. | Character | |
| TKNIDi | Identification number of a TABLEDi entry that defines the force versus deflection relationship. | Integer ≥ 0 | 0 |
Remarks:
- The K, B, and GE entries are associated with same entries on the PBUSH entry.
- PBUSHT may only be referenced by CBUSH elements.
- The nominal values are used for all analysis types except frequency response and nonlinear analyses. For frequency dependent modal frequency response the system modes are computed using the nominal Ki values. The frequency dependent values are used at every excitation frequency.
- The K, B, GE or KN options may be specified in any order.
- The PBUSHT entry is ignored in all solutions except frequency response and nonlinear analyses.