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.

Table 1. Parameters Associated with Rubber
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

Table 2. Parameters Associated with the Fluid Model
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

Table 3. Parameters Associated with Transition from Rubber to Full Hydromount
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