Stress Analysis and Optimization Research of Cladding Titanium-Steel Tube Sheets in Different Tube Patterns

Cladding titanium-steel plate is often used in design of pressure vessel. Using large finite element software, models of cladding titanium-steel tube sheets of tubular heat exchangers are established, to investigate the effect of different tube patterns, including triangle tube pattern and square tube pattern on cladding titanium-steel tube sheets. What is more, stress distribution characteristics of cladding titanium-steel tube sheets in different tube patterns are obtained under different tube diameters. Results show that the effect of tube patterns on cladding titanium-steel tube sheets mainly concentrated in tube layout area. Compared with triangular tube pattern, square tube pattern could effectively improve the phenomenon of stress concentration of cladding titanium-steel tube sheet at the connection of base layer and cladding layer, and then improve performance of cladding titanium-steel tube sheet. However, increase of tube diameters makes an adverse effect on performance of cladding titanium-steel tube sheets in both tube patterns. Through reasonable decrease of tube diameter could enhance the performance of cladding titanium-steel tube sheet. Results provide references to study and design heat exchanger with cladding steel tube sheet.