# Hydromount Damping Block

This block stores a set of coefficients for the hydromount formulation. The block name is a concatenation of HYDROMOUNT_DAMPING_ and the force or moment direction. For instance, if the direction block selects the hydromount formulation for the FZ direction, then the property file should contain a [HYDROMOUNT_DAMPING_FZ] block.

The data block contains a scalar value that determines the number of preload sub-blocks. For each preload there must be a corresponding data sub-block defined as: (PRELOAD_N) where N is a number from 1 to M with M being the total number of preloads.

Each Hydromount Damping block in the property file must contain all twenty-two (22) hydromount damping parameters.

The following tables shows the names, type and dimension of the parameters. Abbreviations are: [A] = angle dimension, [F] = force, [L] = length, [T] = time.

Parameter Name | Type | Units FX, FY, FZ |
---|---|---|

R | real | [T^{-1}] |

K0 | real | [F][L^{-1}] |

K1 | real | [F][L^{-1}] |

K2 | real | [F][L^{-1}] |

C0 | real | [F][T][L^{-1}] |

C1 | real | [F][T][L^{-1}] |

C2 | real | [F][T][L^{-1}] |

P0 | real | No-Units |

P1 | real | [L^{-P2}] |

P2 | real | No-Units |

Q0 | real | No-Units |

Q1 | real | [L^{-Q2}][T^{Q2}] |

Q2 | real | No-Units |

Parameter Name | Type | Units FX, FY, FZ |
---|---|---|

MN | real | [M] |

KH | real | [F][L^{-1}] |

CH1 | real | [F][T][L^{-1}] |

CH2 | real | [F][T][L^{-1}] |

J0 | real | No-Units |

J1 | real | [L^{-P2}] |

J2 | real | No-Units |

L0 | real | No-Units |

L1 | real | [[L^{-Q2}][T^{Q2}] |

L2 | real | No-Units |

Parameter Name | Type | Units FX, FY, FZ |
---|---|---|

XR | real | [L] |

XH | real | [L] |

In a property file, a Hydromount Damping block has this form:

```
[HYDROMOUNT_DAMPING_FZ]
SPD_FILE_NAME = 'C:\Users\rajivr\Desktop\input_50289_fz.spd'
NPRELOADS = 1
(PRELOAD_1)
PRELOAD = 0.0
R = 0.001
C0 = 308.74
K0 = 275.345
C1 = 111.554
K1 = 1659.511332
C2 = 0.266419
K2 = 4.01626
P0 = 1.0
P1 = 0.0
P2 = 1.0
Q0 = 1.0
Q1 = 0.0
Q2 = 1.0
Mh = 0.01
Kh = 90.0
Ch1 = 0.10
Ch2 = 0.50
J0 = 1.0
J1 = 0.0
J2 = 1.0
L0 = 1.0
L1 = 0.0
L2 = 1.0
XR = -1.0
XH = 0.0
```