Both engine noise reduction and light engine weight are required from viewpoint of environmental regulation and economic efficiency.
However, countermeasures relying on use of sound-absorbing and insulation materials have limitations from the viewpoints of cost and weight.
"Property-based optimization" rapidly optimize engine dynamic characteristics by mass and elasticity allocation, and enable the study of engine structure countermeasure for radiated-noise.
Extremely fast simulation of engine operational vibration
ESTECH develops a proprietary computational principle (patented) that enables hundreds of times faster than conventional engine operational vibration simulations.
"ESTECH.PS-X" is vibration analysis software, implemented above principle, makes vibration analysis easier and faster. By using ESTECH.PS-X, substantial number of parameter studies and parametric optimizations become possible.
Operating engine dynamic characteristics
Using the Modal Differential Structure (MDS) method, the structural finite element engine block model divides and transformed into arbitral sub structures that have modal parameters corresponding to material elasticity and mass density.
The assembled dynamic characteristics of whole structure can be predicted in a short time while varying stiffness and mass of each sub structure.
By combining PS-X and MDS, the evaluation of about thousands of engine dynamic-characteristic combinations can be performed in several days, and obtain optimized engine fundamental Structure with desired engine NV performance within a realistic time duration.
