定义弹簧线性行为/学习并整理

wrj001

*SPRING: Define spring behavior.
Required parameter if the behavior of spring elements is being defined.
ELSET
        Set this parameter equal to the name of the element set containing the spring elements for which this behavior is being defined
Data lines to define linear spring behavior for SPRINGA or ITS elements:
First line:
        1. Enter a blank line.
Second line:
        1. Spring stiffness (force per relative displacement).
        2. Frequency (in cycles per time). Applicable only for *STEADY STATE DYNAMICS, DIRECT; *STEADY STATE DYNAMICS, SUBSPACE PROJECTION; and *STEADY STATE DYNAMICS and *MODAL DYNAMIC analyses that support nondiagonal damping.
        3. Temperature.
        4. First field variable.
        5. Second field variable
        6. Etc., up to five field variables.
Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than five):
        1. Sixth field variable.
        6. Etc., up to eight field variables per line.
Repeat this set of data lines as ofen as necessary to define the spring stiffness as a function of frequency, temperature, and other predefined field variables.
如：
*SPRING, ELSET=SPRING

1E3
*ELEMENT,TYPE=SPRINGA,ELSET=SPRING
101,1,120
102,11,131

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