# Pedestrian Comfort Analysis and Parameterized Optimization Design for Raised Floors
## 3 Results
### Optimized Design
#### 3.3.3 Optimized Results Analysis  
Figure 12 illustrates the relationship between optimization parameters and objectives in the context of thermal performance and pedestrian comfort of raised floors. Optimization parameters are represented by the \(X\)-axis, \(Y\)-axis, and sphere size, while optimization objectives are depicted by the sphere color. The \(Y\)-axis serves a dual role as both an optimization parameter and objective. The color of the spheres in Figure 11 indicates the level of optimization achieved, with bluer colors and lower \(Z\)-axis values signaling more comprehensive optimization. Upon completion of calculations, a correlation analysis of the optimization results can be conducted to qualitatively assess the impact of raised floor dimensions on peak acceleration. As a statistical tool, correlation analysis plays a pivotal role in understanding the nature, strength, direction, and trends in relationships between variables. Figure 13 illustrates a correlation heatmap of optimized parameters for CeramicEPS, with the axes representing distinct parameters. Parameter A denotes the peak acceleration derived from dynamic response analysis, while R signifies the thermal resistance of the raised floor. The variables h\({}_{1}\) and h\({}_{2}\) represent the thicknesses of the EPS and waterproof boards, respectively, while beamSpan, beamIndent, beamWidth, and d are  
dimensions related to the raised floor support structure, further detailed in Table 6. Notably, a higher A value is inversely associated with pedestrian comfort, whereas an elevated R value implies a decline in the thermal performance of the raised floor. The heatmap analysis elucidates that the most significant factor affecting pedestrian comfort is the shape of the support structure. Conversely, the primary factor influencing thermal performance is not the thickness of the EPS, but the thickness of the waterproof board. Therefore, by thoughtfully designing the shape of the support structure, one can substantially enhance the pedestrian comfort of raised floors. Concurrently, within the constraints of waterproofing requirements, reducing the thickness of both the EPS and the waterproof board can effectively improve thermal performance. Due to the fact that this study belongs to multi-objective optimization, a relatively optimal set of solutions was obtained during the solving process. Table 8 shows the Pareto optimal set of this study. The Pareto optimal solution set demonstrates a balanced set of solutions between different objectives, offering decision makers various choices to make the best decisions based on specific needs and preferences. Through optimization, six Pareto optimal solutions were provided, forming a product set of raised floors. These solution sets can achieve a two-way balance between the heat transfer performance and pedestrian  
Figure 12: The relationship between optimization parameters and optimization objectives. Figure 13: The correlation between the dimensional parameters of the ceramicEPS. comfort of raised floors. Factories can choose suitable floor component sizes from the Pareto solution set based on their own production capabilities, engineering area conditions, and user preferences. Table 9 presents a comprehensive analysis of the optimization results for four distinct types of raised floors, with a focus on their natural frequencies, thickness variations (*a), sensitivity coefficients (k) relative to different body weights, and peak accelerations calculated across five unique walking scenarios. Upon comparison with Table 6 and Figure 9, it is evident that the optimized designs have somewhat improved the pedestrian comfort of these four floor types while also diminishing their sensitivity to varying body weights. However, the optimization process was not able to completely eliminate the performance disparities between the different floor architectures. Notably, the SteelFloor model continues to demonstrate superior performance levels.