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OCC开发_变高箱梁全桥建模

news 来源：原创 2024/9/20 12:26:29

概述

上一篇文章《OCC开发_箱梁梁体建模》中详细介绍了箱梁梁体建模的过程。但是，对于实际桥梁，截面可能存在高度、腹板厚度、顶底板厚度变化，全桥的结构中心线存在平曲线和竖曲线。针对实际情况，通过一个截面拉伸来实现全桥建模显然不可能。因此，针对变高箱梁，本文新的思路来实现全桥建模。

思路

上一篇文章通过一个截面拉伸生成几何体的方式行不通，我们可以通过不同面来形成棱柱的方式实现。具体步骤如下：

生成控制数据(控制点位置、转角、梁高、底板厚)；
生成各个截面(含内外轮廓，且偏移旋转到指定位置)；
各个截面各轮廓生成棱柱；
布尔运算，外轮廓棱柱扣减各内轮廓棱柱；
保存.Brep文件；
查看效果。

实际的桥梁中，墩顶存在隔板，梁端存在托梁、槽口，隔板还存在人洞，本文暂不涉及这些构造。

代码实现

本文以某个具体桥梁为例来实现全桥建模，桥梁参数见效果栏。

#include <vector>
#include <tuple>
#include <gp_Pnt.hxx>
#include <gp_Circ.hxx>
#include <TopTools_ListOfShape.hxx>
#include <BRepTools.hxx>
#include <BRep_Tool.hxx>
#include <BRepBuilderAPI_MakeEdge.hxx>
#include <BRepBuilderAPI_MakeWire.hxx>
#include <BRepOffsetAPI_ThruSections.hxx>
#include <BRepPrimAPI_MakeBox.hxx>
#include <BRepPrimAPI_MakePrism.hxx>
#include <BRepBuilderAPI_MakeFace.hxx>
#include <ShapeAnalysis_Edge.hxx>
#include <ShapeAnalysis_WireOrder.hxx>
#include <AIS_Shape.hxx>
#include <BRepAlgoAPI_Cut.hxx>
#pragma comment(lib, "TKernel.lib")
#pragma comment(lib, "TKMath.lib")
#pragma comment(lib, "TKG2d.lib")
#pragma comment(lib, "TKG3d.lib")
#pragma comment(lib, "TKGeomBase.lib")
#pragma comment(lib, "TKGeomAlgo.lib")
#pragma comment(lib, "TKBRep.lib")
#pragma comment(lib, "TKTopAlgo.lib")
#pragma comment(lib, "TKShHealing.lib")#define pi 3.141592653589793  //π值预定义//通过初始数据生成边
std::vector<TopoDS_Edge> GetEdges(std::vector<std::tuple <double, double, double>> tuples)
{std::vector<TopoDS_Edge> anEdges;for (int i = 0; i < tuples.size(); ++i){int i1 = i;int i2 = (i + 1) % tuples.size();BRepBuilderAPI_MakeEdge tempRdge(gp_Pnt(std::get<0>(tuples[i1]), std::get<1>(tuples[i1]), std::get<2>(tuples[i1])),gp_Pnt(std::get<0>(tuples[i2]), std::get<1>(tuples[i2]), std::get<2>(tuples[i2])));anEdges.push_back(tempRdge.Edge());}return anEdges;
}//通过边生成形状
TopTools_ListOfShape GetShape(std::vector<TopoDS_Edge> edges)
{TopTools_ListOfShape aOrderedEdges;for (int e = 0; e < edges.size(); ++e){const TopoDS_Edge& anEdge = edges[e];aOrderedEdges.Append(anEdge);}return aOrderedEdges;
}//通过边生成BRepBuilderAPI_MakeWire
BRepBuilderAPI_MakeWire GetWire(std::vector<TopoDS_Edge> outerEdges)
{TopTools_ListOfShape aOrderedEdges = GetShape(outerEdges);BRepBuilderAPI_MakeWire aWireMaker;aWireMaker.Add(aOrderedEdges);return aWireMaker;
}//生成截面定位点信息，未偏置和旋转
std::vector<std::vector<std::tuple <double, double, double>>> GetBoundaryPoints(double height, double bottomThick)
{double topWidth = 16.00;double bottomWidth = 11.00;double edgeThick = 0.2;double rootThick = 0.80;double charmerWidth = 0.30;double charmerHeight = 0.30;double deckThick = 0.60;double topThick = 0.30;std::vector<std::tuple <double, double, double>> tuples;tuples.push_back(std::make_tuple(-topWidth / 2, 0, 0.0));tuples.push_back(std::make_tuple(topWidth / 2, 0, 0.0));tuples.push_back(std::make_tuple(topWidth / 2, -edgeThick, 0.0));tuples.push_back(std::make_tuple(bottomWidth / 2, -rootThick, 0.0));tuples.push_back(std::make_tuple(bottomWidth / 2, -height, 0.00));tuples.push_back(std::make_tuple(-bottomWidth / 2, -height, 0.0));tuples.push_back(std::make_tuple(-bottomWidth / 2, -rootThick, 0.0));tuples.push_back(std::make_tuple(-topWidth / 2, -edgeThick, 0.0));std::vector<std::vector<std::tuple <double, double, double>>> outerTuples;outerTuples.push_back(tuples);for (int i = 0; i < 2; ++i){std::vector<std::tuple <double, double, double>> outerTuple;double gridWidth = bottomWidth / 2 - deckThick * 1.5;double midX = (i == 0 ? -1 : 1) * (bottomWidth / 4 - deckThick / 4);outerTuple.push_back(std::make_tuple(midX - gridWidth / 2 + charmerWidth, -topThick, 0.0));outerTuple.push_back(std::make_tuple(midX - gridWidth / 2, -topThick - charmerHeight, 0.0));outerTuple.push_back(std::make_tuple(midX - gridWidth / 2, -height + bottomThick + charmerHeight, 0.0));outerTuple.push_back(std::make_tuple(midX - gridWidth / 2 + charmerWidth, -height + bottomThick, 0.0));outerTuple.push_back(std::make_tuple(midX + gridWidth / 2 - charmerWidth, -height + bottomThick, 0.0));outerTuple.push_back(std::make_tuple(midX + gridWidth / 2, -height + bottomThick + charmerHeight, 0.0));outerTuple.push_back(std::make_tuple(midX + gridWidth / 2, -topThick - charmerHeight, 0.0));outerTuple.push_back(std::make_tuple(midX + gridWidth / 2 - charmerWidth, -topThick, 0.0));outerTuples.push_back(outerTuple);}return outerTuples;
}//点偏移和旋转
std::tuple <double, double, double> Transform(std::tuple <double, double, double> inputPoint, std::tuple <double, double, double> centerPoint, double angle)
{double x1 = std::get<0>(centerPoint)+ std::get<0>(inputPoint) * cos(angle);double y1 = std::get<1>(centerPoint)+ std::get<1>(inputPoint);double z1 = std::get<2>(centerPoint) + std::get<0>(inputPoint) * sin(angle);return std::make_tuple(x1, y1, z1);
}//实际位置截面(经过偏移和旋转)
std::vector<std::vector<std::tuple <double, double, double>>> GetBoundaryPoints(std::tuple <double, double, double> centerPoint, double angle, double height, double bottomThick)
{std::vector<std::vector<std::tuple <double, double, double>>> sectionBoundaries = GetBoundaryPoints(height, bottomThick);std::vector<std::vector<std::tuple <double, double, double>>> transformedBoundaries;for (int i = 0; i < sectionBoundaries.size(); ++i){std::vector<std::tuple <double, double, double>> transformedBoundary;for (int j = 0; j < sectionBoundaries[i].size(); ++j){//transformedBoundary.push_back(sectionBoundaries[i][j]);transformedBoundary.push_back(Transform(sectionBoundaries[i][j], centerPoint, angle));}transformedBoundaries.push_back(transformedBoundary);}return transformedBoundaries;
}//输出梁高列表(也可以用于板厚)
std::vector<double> GetHeightList(std::vector<double> canSegmentLengthList, double colTopBeamHeight, double midBeamHeight)
{double detaHeight = colTopBeamHeight - midBeamHeight;double totalLength = 0;for (int i = 0; i < canSegmentLengthList.size(); ++i){totalLength = totalLength + canSegmentLengthList[i];}double factorA = detaHeight / (totalLength * totalLength);std::vector<double> heightList = { midBeamHeight };double detaLength = 0;for (int i = 0; i < canSegmentLengthList.size(); ++i){detaLength = detaLength + canSegmentLengthList[i];double height = factorA * detaLength * detaLength + midBeamHeight;heightList.insert(heightList.begin(), height);}return heightList;
}//输出里程、梁高、板厚列表
std::vector<std::tuple <double, double, double>> GetStaTupleList(std::vector<double> canSegmentLengthList, double midSta, double equalHeightLength, double colTopBeamHeight, double midBeamHeight, double colTopBottomThick, double midBottomThick)
{std::vector<double> heightList = GetHeightList(canSegmentLengthList, colTopBeamHeight, midBeamHeight);//梁高列表std::vector<double> bottomThickList = GetHeightList(canSegmentLengthList, colTopBottomThick, midBottomThick);//梁高列表std::vector<std::tuple <double, double, double>> staTupleList;staTupleList.push_back(std::make_tuple(midSta - equalHeightLength / 2, colTopBeamHeight, colTopBottomThick));staTupleList.push_back(std::make_tuple(midSta + equalHeightLength / 2, colTopBeamHeight, colTopBottomThick));double staStart = midSta - equalHeightLength / 2;double staEnd = midSta + equalHeightLength / 2;for (int i = 0; i < canSegmentLengthList.size(); ++i){staStart = staStart - canSegmentLengthList[i];staEnd = staEnd + canSegmentLengthList[i];staTupleList.push_back(std::make_tuple(staEnd, heightList[i + 1], bottomThickList[i + 1]));staTupleList.insert(staTupleList.begin(), std::make_tuple(staStart, heightList[i + 1], bottomThickList[i + 1]));}return staTupleList;
}//获取位置、角度、梁高、顶板厚列表
//跨径组合65+110+65
//支点梁高6.5，板厚0.8，跨中梁高2.6，板厚0.32
//支点等高段3，变高段52.5，合拢段3，边跨9
//节段划分12+3*3.5+6*4+3*4.5
//起点里程为0，高程为0，终点高程2.4m
//平面在半径1000的圆曲线上
std::vector<std::tuple <std::tuple <double, double, double>, double, double, double>> GetControlMessageList()
{double edgeSpanLength = 65;//边跨长double midSpanLength = 100;//中跨长double colTopBeamHeight = 6.5;//墩顶梁高double midBeamHeight = 2.6;//跨中梁高double colTopBottomThick = 0.8;//墩顶板厚double midBottomThick = 0.32;//跨中板厚double equalHeightLength = 3;//墩顶等高段长double variableHeightLength = 52.5;//变高段长double closedSegmentLength = 2;//合拢段长double edgeSegmentLength = 9;//边跨现浇段长std::vector<double> canSegmentLengthList = { 4.5,3.5,3.5,3.5,4,4,4,4,4,4,4.5,4.5,4.5 };//T构节段长列表std::vector<std::tuple <double, double, double>> staList;//里程，梁高，底板厚//计算两个T构的里程，梁高，底板厚double midSta = edgeSpanLength; //墩顶中心里程std::vector<std::tuple <double, double, double>> list1 = GetStaTupleList(canSegmentLengthList, midSta, equalHeightLength, colTopBeamHeight, midBeamHeight, colTopBottomThick, midBottomThick);staList.insert(staList.end(), list1.begin(), list1.end());midSta = edgeSpanLength + midSpanLength; //墩顶中心里程std::vector<std::tuple <double, double, double>> list2 = GetStaTupleList(canSegmentLengthList, midSta, equalHeightLength, colTopBeamHeight, midBeamHeight, colTopBottomThick, midBottomThick);staList.insert(staList.end(), list2.begin(), list2.end());//计算两侧边跨段的里程，梁高，底板厚double endSta0 = std::get<0>(staList[staList.size() - 1]);double endSta1 = endSta0 + closedSegmentLength;double endSta2 = endSta0 + (closedSegmentLength+ edgeSegmentLength);double startSta0 = std::get<0>(staList[0]);double startSta1 = startSta0 - closedSegmentLength;double startSta2 = startSta0 - (closedSegmentLength + edgeSegmentLength);staList.insert(staList.end(), std::make_tuple(endSta1, midBeamHeight, midBottomThick));staList.insert(staList.end(), std::make_tuple(endSta2, midBeamHeight, midBottomThick));staList.insert(staList.begin(), std::make_tuple(startSta1, midBeamHeight, midBottomThick));staList.insert(staList.begin(), std::make_tuple(startSta2, midBeamHeight, midBottomThick));//计算坐标和角度std::vector<std::tuple <std::tuple <double, double, double>, double, double, double>> pointTuples;for (int i = 0; i < staList.size(); ++i){std::tuple <double, double, double> tuple = staList[i];double detaSta = std::get<0>(tuple);double detaHeight = detaSta * 0.01;//竖向，Ydouble detaSita = detaSta / 1000;double sita = pi / 2 - detaSita;double detaX = 1000 * cos(sita);//纵向double detaY = 1000 - 1000 * sin(sita);//横向double beamHeight = std::get<1>(tuple);double bottomThick = std::get<2>(tuple);std::tuple <double, double, double> point = std::make_tuple(detaY , detaHeight, detaX);pointTuples.push_back(std::make_tuple(point, detaSita, beamHeight, bottomThick));}return pointTuples;
}//生成全桥
void GenerateBridge()
{//生成控制信息std::vector<std::tuple <std::tuple <double, double, double>, double, double, double>> pointTuples = GetControlMessageList();//生成各个截面std::vector<std::vector<std::vector<std::tuple <double, double, double>>>> sections;//所有截面实际定位信息(偏移旋转后)for (int i = 0; i < pointTuples.size(); ++i){std::tuple <std::tuple <double, double, double>, double, double, double> tuple = pointTuples[i];std::tuple <double, double, double> points = std::get<0>(tuple);sections.push_back(GetBoundaryPoints(std::get<0>(tuple), std::get<1>(tuple), std::get<2>(tuple), std::get<3>(tuple)));}//生成截面各轮廓体std::vector<BRepOffsetAPI_ThruSections> generators;for (int i = 0; i < sections[0].size(); ++i){BRepOffsetAPI_ThruSections generator(Standard_True, Standard_False);generators.push_back(generator);}for (int i = 0; i < sections.size(); ++i){std::vector<std::vector<std::tuple <double, double, double>>> section = sections[i];for (int j = 0; j < section.size(); ++j){std::vector<TopoDS_Edge> innerEdges0 = GetEdges(section[j]);TopoDS_Wire wire = GetWire(innerEdges0);generators[j].AddWire(wire);}}std::vector<TopoDS_Shape> shapes;for (int i = 0; i < sections[0].size(); ++i){generators[i].Build();shapes.push_back(generators[i].Shape());}//外轮廓体扣减内轮廓体TopoDS_Shape S1 = BRepAlgoAPI_Cut(shapes[0], shapes[1]);for (int i = 2; i < sections[0].size(); ++i){S1 = BRepAlgoAPI_Cut(S1, shapes[i]);}//输出BRepTools::Write(S1, "d:/wire.brep");//保存文件
}//主函数
int main(int argc, char* argv[])
{GenerateBridge();return 0;
}

效果

桥梁在半径1000m的圆弧平曲线上，竖曲线为1%的纵坡。全桥跨径组合为65+110+65m，墩顶梁高6.5m，跨中梁高2.8m，顶板厚0.3m，底板厚0.32~0.8m，抛物线次数为2.0次，墩顶水平段3m，变高段52.5m，跨中合拢段和边跨合拢段均为2.0m，边跨现浇段9m，T构节段划分为12+33.5+64+3*4.5m。桥梁立面图纸(已经对称处理)如下：
在这里插入图片描述