例图里，函数图的TIKZ编译

要编译例图里的函数图形，尝试写的代码没准确实现。

\documentclass[1pt]{standalone}
\usepackage{amsmath,amssymb,amsfonts}
\usepackage{euler}
\usepackage{xcolor}
\usepackage{pgfplots}
\usepackage{pgfplotstable}
\usepgfplotslibrary{colormaps}
\usetikzlibrary{
    pgfplots.groupplots,
    matrix
}
\pgfplotsset{width=7cm}
\begin{document}
\begin{tikzpicture}
    \begin{loglogaxis}[
    enlargelimits=false,
    grid=both,
    ymin=5e-6,ymax=1,
    xlabel= undulations per revolution(UPR),
    ylabel=amplitude transmission,
    log basis y=10,
    log basis x=10,
    domain=1e0:1e4,samples=360
    ]
    %    \addplot+[no marks,thick]{1.0*exp(-5*x)};
    \addplot+[no marks,thick]{exp(-3.1415*(0.4697*x/15))};
    \addplot+[no marks,thick]{exp(-3.1415*(0.4697*x/50))};
    \addplot+[no marks,thick]{exp(-3.1415*(0.4697*x/150))};
    \addplot+[no marks,thick]{exp(-3.1415*(0.4697*x/500))};
\end{loglogaxis}
\end{tikzpicture}
\end{document} 

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