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Interpolation problem

Posted 8 mars 2022, 05:38 UTC−5 General 1 Reply

文韬 张
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When I import the table data to form an interpolation function, I expect to get the figure shown in Figure 1, but what I actually get is Figure 2.

1 Reply Last Post 8 mars 2022, 07:42 UTC−5
Mark Harradine
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Posted: 2 years ago 8 mars 2022, 07:42 UTC−5

You function is not monotonic, so may be tricky to implement as you are planning. It looks like you are plotting the reaction force of something as a prescribed displacement is increased then decreased.

You may be better off using the interpolation function with the solve parameter as the argument and making your presribed displacement a function of a monotonic parameter increase.

This can be achived using "if" statements in your prescribed displacement function. See attached Excel file...

You function is not monotonic, so may be tricky to implement as you are planning. It looks like you are plotting the reaction force of something as a prescribed displacement is increased then decreased. You may be better off using the interpolation function with the solve parameter as the argument and making your presribed displacement a function of a monotonic parameter increase. This can be achived using "if" statements in your prescribed displacement function. See attached Excel file...

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