LIGHTNING STRIKE.

Narrative

WHILE DEVIATING AROUND A LINE OF WX DURING THE INITIAL APCH SEGMENT FOR AN ILS RWY 18R AT CVG; WE RECEIVED A LIGHTNING STRIKE. THE STRIKE CAUSED SEVERE ENG VIBRATION. WE IMMEDIATELY RETREATED FROM THE AREA OF WX (TO AN AREA OF LITTLE OR NO PRECIPITATION) AND NOTIFIED ATC OF OUR SIT; ADVISING THEM AN ENG SHUTDOWN MIGHT BE REQUIRED. WHEN THE #1 VIBRATION GAUGE WENT TO THE 'PEG' I PERFORMED THE 'ENG FIRE/SEVERE DAMAGE (INFLT)' MEMORY ITEMS (IE; SHUTDOWN ENG). I NOTIFIED ATC OF THE SHUTDOWN. ATC ADVISED ME THAT DAYTON; OH; (DAY) WAS THE CLOSEST ARPT. SINCE CONTINUING TO CVG WOULD HAVE TAKEN US BACK THROUGH THE WX; I OPTED TO LAND AT DAY. WE DECLARED AN EMER; PERFORMED THE REQUIRED CHKLISTS FOR SINGLE ENG APCH AND LNDG; AND LANDED AT DAYTON WITHOUT FURTHER INCIDENT. IT WAS SUBSEQUENTLY DISCOVERED THAT A 10 INCH SEGMENT OF THE R WINGLET HAD DISINTEGRATED. FO AND I PERFORMED OUR DUTIES TO THE POINT THAT AFTER ENG WAS SHUTDOWN; WE FELT LIKE WE WERE DOING JUST ANOTHER SIMULATOR SCENARIO; AS A NEW CAPT IN THE AIRPLANE; I CAN SAY WITH SOME CONFIDENCE THAT I WAS PROPERLY TRAINED TO THE POINT THAT TURNED INTO AN ALMOST EMOTIONLESS 'BEEN THERE -- DONE THAT' SIT. THAT'S WHAT'S SUPPOSED TO HAPPEN.