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<h1 class="mume-header" id="%E5%B8%A6%E6%9C%89gpu%E5%8A%A0%E9%80%9F%E7%9A%84%E5%A3%B0%E5%9C%BAfdtd%E6%96%B9%E6%B3%95">带有GPU加速的声场FDTD方法</h1>
<p>一个利用cuda加速python程序利用fdtd算法进行声场模拟的程序。计算结果用numpy数组格式保存。</p>
<p>基于python3和cuda，仅可在装备有NVIDIA显卡的计算机上使用。</p>
<h2 class="mume-header" id="%E6%96%87%E4%BB%B6%E7%BB%93%E6%9E%84">文件结构</h2>
<pre data-role="codeBlock" data-info="shell" class="language-shell"><span class="token punctuation">..</span>/cuf
├── cufig.ini 主配置文件
├── cuf.py 主程序
├── initdog.py 初始文件生成脚本
├── LICENSE
├── README.md
├── res 计算结果保存位置
├── scr
└── usercode.c 次配置文件
</pre><h2 class="mume-header" id="%E4%BD%BF%E7%94%A8%E6%96%B9%E6%B3%95">使用方法</h2>
<pre data-role="codeBlock" data-info="bash" class="language-bash">./cuf.py -t 【计算模式】【配置文件】
</pre><p>默认配置文件为<code>cufig.ini</code></p>
<p>计算模式目前有且仅有四种，分别为：</p>
<ul>
<li>2d 普通二维模式</li>
<li>2dm 带有mur吸收边界的二维模式</li>
<li>3d 普通三维模式</li>
<li>3dm 带有mur吸收边界的三维模式</li>
</ul>
<h3 class="mume-header" id="%E4%B8%BB%E8%A6%81%E9%85%8D%E7%BD%AE%E6%96%87%E4%BB%B6">主要配置文件</h3>
<pre data-role="codeBlock" data-info="ini" class="language-ini"><span class="token selector">[计算规模]</span>
<span class="token constant">长度</span> <span class="token attr-value"><span class="token punctuation">=</span> 128</span>
<span class="token constant">宽度</span> <span class="token attr-value"><span class="token punctuation">=</span> 128</span>
<span class="token constant">高度</span> <span class="token attr-value"><span class="token punctuation">=</span> 128</span>
；二维模式时此项不填
<span class="token constant">计算时间</span> <span class="token attr-value"><span class="token punctuation">=</span> 10000</span>
；计算的总时间步长
<span class="token selector">[初始值]</span>
<span class="token constant">自动初值</span> <span class="token attr-value"><span class="token punctuation">=</span> 是</span>
；初始值的添加方式，自动初始值则全部清零。提供初始值的则在下面添加路径。
<span class="token constant">p0路径</span> <span class="token attr-value"><span class="token punctuation">=</span> </span>
<span class="token constant">vx路径</span> <span class="token attr-value"><span class="token punctuation">=</span></span>
<span class="token constant">vy路径</span> <span class="token attr-value"><span class="token punctuation">=</span> </span>
<span class="token constant">vz路径</span> <span class="token attr-value"><span class="token punctuation">=</span></span>
<span class="token constant">z0路径</span> <span class="token attr-value"><span class="token punctuation">=</span> dogz.npy</span>
；z0为必填项
<span class="token constant">m</span> <span class="token attr-value"><span class="token punctuation">=</span> 4</span>
<span class="token selector">[中间过程]</span>
<span class="token constant">添加方式</span> <span class="token attr-value"><span class="token punctuation">=</span>./usercode.c</span>
；次配置文件路径
<span class="token selector">[结果输出]</span>
<span class="token constant">输出频率</span> <span class="token attr-value"><span class="token punctuation">=</span> 1000</span>
；输出的时间周期
<span class="token constant">输出路径</span> <span class="token attr-value"><span class="token punctuation">=</span> ./res/</span>
；输出的路径
</pre><h3 class="mume-header" id="%E6%AC%A1%E8%A6%81%E9%85%8D%E7%BD%AE%E6%96%87%E4%BB%B6">次要配置文件</h3>
<p>次要配置文件将在计算的准备阶段编译进计算主程序之中。配置错误将导致程序无法运行。</p>
<p>次要配置文件提供在每一步计算后，通过C语言对数据操作的能力，一般用于添加源或者其余条件。</p>
<p>二维模式下次要配置文件写法。</p>
<pre data-role="codeBlock" data-info="C" class="language-c"><span class="token keyword">void</span> <span class="token function">usercode</span><span class="token punctuation">(</span><span class="token keyword">float</span> <span class="token operator">*</span> p1<span class="token punctuation">,</span><span class="token keyword">float</span> <span class="token operator">*</span> vx1<span class="token punctuation">,</span><span class="token keyword">float</span> <span class="token operator">*</span> vy1<span class="token punctuation">,</span><span class="token keyword">float</span> <span class="token operator">*</span>z0j<span class="token punctuation">,</span><span class="token keyword">int</span> xar<span class="token punctuation">,</span> <span class="token keyword">int</span> yar<span class="token punctuation">,</span><span class="token keyword">float</span> m<span class="token punctuation">,</span><span class="token keyword">int</span> i<span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token comment">// 以下内容可以更改</span>
p1<span class="token punctuation">[</span><span class="token number">4</span><span class="token operator">*</span>xar<span class="token operator">+</span><span class="token number">4</span><span class="token operator">*</span>yar<span class="token punctuation">]</span><span class="token operator">=</span><span class="token function">sin</span><span class="token punctuation">(</span><span class="token number">0.1</span><span class="token operator">*</span>i<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
</pre><p>相关说明：</p>
<p>p1 : 指向计算过程之中的压强场指针</p>
<p>vx1 : 指向计算过程之中的x方向速度分量场<br>
指针<br>
vy1 : 指向计算过程之中的y方向速度分量场指针</p>
<p>z0j : 指向计算过程之中介质参数场指针</p>
<p>xar yar : 坐标索引。例：调用压强场的(a,b)点数据：p1[a*xar+b*yar]</p>
<p>m : m参数值</p>
<p>i : 时间，表示已经计算到第i步</p>
<p>三维模式下次要配置文件写法。</p>
<pre data-role="codeBlock" data-info="C" class="language-c"><span class="token keyword">void</span> <span class="token function">usercode</span><span class="token punctuation">(</span><span class="token keyword">float</span> <span class="token operator">*</span> p1<span class="token punctuation">,</span><span class="token keyword">float</span> <span class="token operator">*</span> vx<span class="token punctuation">,</span><span class="token keyword">float</span> <span class="token operator">*</span> vy<span class="token punctuation">,</span><span class="token keyword">float</span> <span class="token operator">*</span> vz<span class="token punctuation">,</span><span class="token keyword">float</span> <span class="token operator">*</span>z0<span class="token punctuation">,</span><span class="token keyword">int</span> xar<span class="token punctuation">,</span> <span class="token keyword">int</span> yar<span class="token punctuation">,</span><span class="token keyword">int</span> zar<span class="token punctuation">,</span><span class="token keyword">float</span> m<span class="token punctuation">,</span><span class="token keyword">int</span> i<span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token comment">// 以下内容可以更改</span>
p1<span class="token punctuation">[</span><span class="token number">64</span><span class="token operator">*</span>xar<span class="token operator">+</span><span class="token number">64</span><span class="token operator">*</span>yar<span class="token operator">+</span><span class="token number">64</span><span class="token operator">*</span>zar<span class="token punctuation">]</span><span class="token operator">=</span><span class="token function">sin</span><span class="token punctuation">(</span><span class="token number">0.1</span><span class="token operator">*</span>i<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
</pre><p>p1 : 指向计算过程之中的压强场指针</p>
<p>vx : 指向计算过程之中的x方向速度分量场指针</p>
<p>vy : 指向计算过程之中的y方向速度分量场指针</p>
<p>vz : 指向计算过程之中的z方向速度分量场指针</p>
<p>z0j : 指向计算过程之中介质参数场指针</p>
<p>xar yar 砸人: 坐标索引。例：调用压强场的(a,b，c)点数据：p1[a*xar+b*yar+c*zar]</p>
<p>m : m参数值</p>
<p>i : 时间，表示已经计算到第i步</p>
<h2 class="mume-header" id="%E6%95%B0%E7%BB%84%E7%94%9F%E6%88%90%E5%99%A8">数组生成器</h2>
<pre data-role="codeBlock" data-info="bash" class="language-bash">$./initdog.py --help
usage: initdog.py <span class="token punctuation">[</span>-h<span class="token punctuation">]</span> <span class="token punctuation">[</span>-2d <span class="token operator">|</span> -3d<span class="token punctuation">]</span> <span class="token punctuation">[</span>-name <span class="token punctuation">[</span>NAME<span class="token punctuation">]</span><span class="token punctuation">]</span> <span class="token punctuation">[</span>-n <span class="token punctuation">[</span>N<span class="token punctuation">]</span><span class="token punctuation">]</span> x y <span class="token punctuation">[</span>z<span class="token punctuation">]</span>
NPY格式数组生成器
默认数值为1
例子：
生成一个2X3的名为“num”二维数组:
./initdog.py -2d -name num 2 3
生成一个2X3X4的数值为5.3的三维数组：
/initdog.py -3d -n 5.3 2 3 4
positional arguments:
x X轴
y Y轴
z Z轴
optional arguments:
-h, --help show this <span class="token function">help</span> message and <span class="token keyword">exit</span>
-2d, --d2 二维
-3d, --d3 三维
-name <span class="token punctuation">[</span>NAME<span class="token punctuation">]</span> 输出文件名
-n <span class="token punctuation">[</span>N<span class="token punctuation">]</span> 数值
</pre><h2 class="mume-header" id="%E7%9B%B8%E5%85%B3%E4%BE%9D%E8%B5%96">相关依赖</h2>
<ul>
<li>make</li>
<li>nvcc</li>
<li>argparse</li>
<li>configparser</li>
<li>numpy</li>
<li>matplotlib</li>
<li>progressbar</li>
</ul>
<h2 class="mume-header" id="%E7%89%88%E6%9C%AC%E6%9B%B4%E6%96%B0">版本更新</h2>
<p>1.0 原始版本</p>
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