地理学视角下的室内三维场景日照分析模型研究

The traditional sunlight anaysis from the perspective of architecture mainly focuses on the computaion of sunshine duration. Under the traditional computation framework, the scene is dispersed into point, line, polygon and then the calculations and expressions are performed in a 2D mode, which can not truely reflect the spatial distribution and dynamic process of the light cross and light spot of the sun in the 3D indoor scene.This project will resume the cognition of sunlight analysis from the perspective of geography.According to the spatio-temporal relationship between sunlight and the indoor scene, this project will build the data model of the scene driven by sunlight analysis and set up the analysis framework for it. Then, the computation model will be created on the basis of the beam cutting algorithm and occlusion judgment algorithm, etc., to research the spatial morphology, spatial distribution, attributes and spatio-temporal process of the light cross and light spot indoor. Then research will focus on the distribution regulation of the area of light spot, radiation intensity, etc., and the change regulation of the blaze area, dark area and flare area under different time, location and building layout. The resolve of the research contents and key technologies of this project will be helpful to the simulation of the spatio-temporal process of light cross and light spot as well as the luminous effect caused by sunlight, which will make the results of sunlight analysis practically be used by ordinary people, and promote the development of the theory and technology of the simulation and modeling of the buidling for public.

传统建筑学视角下的日照分析以日照时数计算为核心，采用二维点、线、面离散的方式来对室外场景进行分析与表达，不能真实反映室内三维场景中太阳光影、光柱的空间分布与动态过程。本项目在地理学视角下，对日照分析进行重新认识。围绕太阳光线与室内场景的时空关系，构建日照分析驱动的三维场景数据模型与室内日照分析框架。在此基础上，基于光柱切割法、光线遮挡判别法等基本算法，构建计算分析模型，对室内光影、光柱的空间形态、空间分布、属性特征以及时空过程进行研究。进而研究由太阳照射所产生的光影区域面积、辐射强度等指标的空间分布规律以及室内强光、弱光、炫光等区域随时间、地理位置、建筑布局的不同而产生的变化规律。本课题研究内容与关键技术的解决，有助于实现室内三维场景中太阳光影、光柱的时空过程及其照射效果的模拟，使得日照分析结果能够真正为民所用，从而促进面向公众服务的建筑物建模、模拟理论与技术的发展。

本项目在地理学视角下，对日照分析进行重新认识。围绕太阳光线与室内场景的时空关系，构建了日照分析驱动的三维场景数据模型与室内日照分析框架。基于光柱切割法、光线遮挡判别法等基本算法，构建计算分析模型，对室内光影、光柱的空间形态、空间分布、属性特征以及时空过程进行了研究。对太阳照射所产生的光影区域面积、辐射强度等指标的空间分布规律以及室内强光、弱光、炫光等区域随时间、地理位置、建筑布局的不同而产生的变化规律进行了研究。. 本项目最核心的研究成果在数据模型及其建模方法两部分。所构建的建筑物三维模型具有语义、几何、属性、关系等信息，不仅能够满足日照分析的需求，还能够向应急疏散等其他领域进行扩展，进而成为一种通用的建筑物三维模型。该模型的建模方法是基于 CAD的三维建模的扩展，有望为传统的基于 CAD的现有建筑向 BIM模型转换提供一套可行方案。. 依托本项目，共发表研究论文7篇，其中SCI两篇，EI一篇，核心期刊四篇，专著一本，授权专利1个。本项目实现了室内三维场景中太阳光影、光柱的时空过程及其照射效果的模拟，使得日照分析结果能够真正为民所用，从而促进面向公众服务的建筑物建模、模拟理论与技术的发展。.