METHOD FOR DETERMINING A PARAMETER RELEVANT FOR CAUSING DAMAGE TO A STRUCTURE
First Claim
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1. A method for determining a parameter relevant for causing damage to a structure, the method comprising:
- a) measuring a local stress on at least one point of the structure as a function of time;
b) generating a stress-time function;
c) breaking down of the stress-time function into individual stress cycles;
d) determining a frequency of the stress cycles and at least one additional classification parameter of the stress cycles;
e) assigning the stress cycles to different frequency classes as a function of the frequency of the stress cycles;
f) generating a collective for the stress cycles in each frequency class by carrying out a single-parameter or a multi-parameter classification method;
g) determining a relevance of the collective of each frequency class for causing damage to the structure; and
h) determining the particular frequency class that is most relevant for causing damage to the structure.
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Abstract
A method for determining a parameter relevant for the damage to a structure, such as machines, machine components and individual assemblies that are subject to vibration stresses is disclosed. A method for active or passive vibration damping that makes use of this method, and a structure having a device configured to perform the above methods is also disclosed.
7 Citations
18 Claims
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1. A method for determining a parameter relevant for causing damage to a structure, the method comprising:
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a) measuring a local stress on at least one point of the structure as a function of time; b) generating a stress-time function; c) breaking down of the stress-time function into individual stress cycles; d) determining a frequency of the stress cycles and at least one additional classification parameter of the stress cycles; e) assigning the stress cycles to different frequency classes as a function of the frequency of the stress cycles; f) generating a collective for the stress cycles in each frequency class by carrying out a single-parameter or a multi-parameter classification method; g) determining a relevance of the collective of each frequency class for causing damage to the structure; and h) determining the particular frequency class that is most relevant for causing damage to the structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16)
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15. A method for active or passive vibration damping of a structure, comprising:
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a) measuring a local stress on at least one point of the structure as a function of time; b) generating a stress-time function; c) breaking down of the stress-time function into individual stress cycles; d) determining a frequency of the stress cycles and at least one additional classification parameter of the stress cycles; e) assigning the stress cycles to different frequency classes as a function of the frequency of the stress cycles; f) generating a collective for the stress cycles in each frequency class by carrying out a single-parameter or a multi-parameter classification method; g) determining a relevance of the collective of each frequency class for causing damage to the structure; and h) determining the particular frequency class that is most relevant for causing damage to the structure, and i) intentionally damping at least one frequency located in the frequency class determined in step (g).
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17. A structure, comprising a device configured to execute a method for determining a parameter relevant for causing damage to a structure, the method comprising:
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(a) measuring a local stress on at least one point of the structure as a function of time; (b) generating a stress-time function; (c) breaking down of the stress-time function into individual stress cycles; (d) determining a frequency of the stress cycles and at least one additional classification parameter of the stress cycles; (e) assigning the stress cycles to different frequency classes as a function of the frequency of the stress cycles; (f) generating a collective for the stress cycles in each frequency class by carrying out a single-parameter or a multi-parameter classification method; (g) determining a relevance of the collective of each frequency class for causing damage to the structure; and (h) determining the particular frequency class that is most relevant for causing damage to the structure. - View Dependent Claims (18)
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Specification