![模态形状 圆板](https://linux22.com/image/384240/%E6%A8%A1%E6%80%81%E5%BD%A2%E7%8A%B6%20%E5%9C%86%E6%9D%BF.png)
答案1
这是仅针对网格的提议。蓝色曲线也可以做,但更复杂。
\documentclass[tikz,border=3.14mm]{standalone}
\usetikzlibrary{math}
\usepackage{pgfplots}
\pgfplotsset{compat=1.16}
\begin{document}
\begin{tikzpicture}
\begin{axis}[view={60}{20},unit vector ratio=1 1 0.5]
\addplot3[mesh,color=black,%surf,shader=flat,
samples=31,trig format=rad,
domain=0:2, y domain=0:2*pi,
z buffer=sort]
({x*cos(y)},
{x*sin(y)},{cos(x*pi)/(1+x*x)});
\end{axis}
\end{tikzpicture}
\end{document}